UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K


                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): December 20, 2005

                               CALPINE CORPORATION
             (Exact name of registrant as specified in its charter)

                                    Delaware
                 (State or Other Jurisdiction of Incorporation)

                        Commission File Number: 001-12079

                I.R.S. Employer Identification Number: 77-0212977

                           50 West San Fernando Street
                           San Jose, California 95113
                            Telephone: (408) 995-5115
          (Address of principal executive offices and telephone number)

          Check the appropriate  box below if the Form 8-K filing is intended to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))






ITEM 1.01 -- ENTRY INTO A MATERIAL AGREEMENT.

     On December  20,  2005,  the Board of  Directors  (the  "Board") of Calpine
Corporation (the "Company") approved an employment  agreement with Robert P. May
to serve  as the  Company's  Chief  Executive  Officer.  The  agreement  is made
effective as of December 12, 2005,  the date that Mr. May was appointed as Chief
Executive Officer, and includes the following provisions:

     1.   The initial term of the  agreement  is two years  (until  December 31,
          2007) and is  automatically  renewable for  successive  12-month terms
          unless either party provides  written notice to the other at least 180
          days prior to the date of any such renewal of his or its intention not
          to renew.

     2.   Mr. May will  receive a base salary of  $1,500,000  during the initial
          and any subsequent  term. The Board shall review Mr. May's base salary
          at  least  annually,  and may  increase  it at any  time  in its  sole
          discretion.

     3.   Mr. May shall be eligible to receive an annual cash performance  bonus
          so long as he remains  employed  by the Company on the last day of the
          applicable  fiscal year. Mr. May's target bonus will be established by
          the  Board  but the  minimum  target  bonus  will be 100% of his  base
          salary,  and his  actual  bonus may range  from 0% to 200% of his base
          salary as determined  by the Board,  except that Mr. May shall receive
          minimum  bonuses for the fiscal  years ending  December 31, 2006,  and
          December 31, 2007, of $2,250,000 and $1,500,000, respectively. Mr. May
          shall also receive a one time signing  bonus of  $2,000,000,  which is
          payable by  December  27,  2005,  and shall be  eligible  to receive a
          success fee of $12,000,000 if and when a plan of  reorganization  that
          is confirmed by the  bankruptcy  court  becomes  effective  during Mr.
          May's  tenure as Chief  Executive  Officer of the Company or within 12
          months after  termination  of Mr. May's  employment,  but only if such
          termination  is by Mr. May for good reason or by the  Company  without
          cause  except that Mr. May shall not be entitled to the success fee if
          the  Company  terminates  his  employment  for cause,  he resigns  his
          employment  without good reason or his  employment  terminates  due to
          death or  disability  before the effective  date of the plan.  Mr. May
          will also participate in employee benefit programs available to senior
          executives of the Company.

     4.   Mr. May shall  continue  to serve as a member of the Board for as long
          as he continues to be nominated and elected.

     5.   Mr. May is entitled to certain severance  benefits as set forth in the
          agreement  in the event that Mr. May  resigns  for good  reason or the
          Company   terminates  his  employment  without  cause.  The  severance
          benefits  include an amount  equal to the sum of Mr. May's base salary
          and  target  bonus at the time of the  termination  of his  employment
          (except that if the termination were to occur in 2006 or 2007, in lieu
          of the target bonus  amount,  Mr. May would  receive the minimum bonus
          amount for such years) paid over a year.  If Mr. May's  employment  is
          terminated  because of his death or disability,  he or his estate will
          receive a pro rata portion of his then current target bonus.

     6.   The  Company  will  provide  indemnification  to  Mr.  May  under  its
          Certificate  of  Incorporation   and  Bylaws  to  the  fullest  extent
          permitted by law.

     A copy of Mr. May's employment agreement is filed herewith as Exhibit 10.1.


ITEM 5.02 -- DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF
             DIRECTORS; APPOINTMENT OF PRINCIPAL OFFICERS.

     (b) On December 20, 2005, director Peter Cartwright resigned from the Board
of Directors of Calpine Corporation.


ITEM 9.01 -- FINANCIAL STATEMENTS AND EXHIBITS.

     (d) Exhibits.

         10.1  Employment Agreement,  effective as of December 12, 2005, between
               the Company and Robert P. May.





                                   SIGNATURES


Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                  CALPINE CORPORATION

                                  By:  /s/ Charles B. Clark, Jr.
                                       -------------------------------------
                                       Charles B. Clark, Jr.
                                       Senior Vice President, Controller and
                                       Chief Accounting Officer


Date: December 27, 2005





                                  EXHIBIT INDEX




Exhibit                               Description
- -------   --------------------------------------------------------------------
 10.1     Employment Agreement, effective as of December 12, 2005, between the
          Company and Robert P. May.

================================================================================

EXHIBIT 10.1



                              EMPLOYMENT AGREEMENT



        This Employment Agreement (the "Agreement") is entered into effective as
of December 12, 2005, between CALPINE  CORPORATION,  a Delaware corporation (the
"Company"),  and ROBERT P. MAY ("Executive") to provide the terms and conditions
for Executive's employment with the Company and its affiliates from time to time
(together, the "Group").

        The Board of Directors of the Company (the "Board")  named  Executive as
Chief Executive Officer of the Company and a member of the Board on December 12,
2005 (the "Start Date").

        The Company and Executive have agreed that Executive will be employed by
the Company and will serve as the Company's  Chief Executive  Officer,  upon the
terms and conditions set forth below.

        Accordingly, and in consideration of the mutual obligations set forth in
this Agreement, which Executive and the Company agree are sufficient,  Executive
and the Company agree as follows:

     1. Term of  Employment.  Subject to the  provisions  of  paragraph 4 below,
Executive's  term of employment  ("Term of Employment")  consists of the initial
term and any  subsequent  term for which the  Agreement is renewed.  The initial
term of this  Agreement  begins on December 12,  2005,  and ends on December 31,
2007.  Subject to the termination  provisions of paragraph 4 below,  Executive's
employment  by the Company shall be  automatically  renewed for an additional 12
months at the end of the initial term and each annual  anniversary of the end of
the then-current renewal term unless either party provides written notice to the
other  party  no less  than 180  days  prior  to the date of any such  scheduled
renewal of its or his intention not to renew the term of Executive's employment.

     2. Position and Responsibilities.  During the Term of Employment, Executive
shall have the position  and  responsibilities  described  in this  paragraph 2.
Executive shall be employed as the Company's Chief Executive  Officer,  with the
general  executive powers and authority that accompany that position.  Executive
shall   report   directly   to  the  Board  and  shall   have  the   duties  and
responsibilities  that are typically performed by the chief executive officer of
a public company,  as well as any other duties consistent with his position that
are  assigned to  Executive  by the Board.  Unless and until the Board  elects a
President  of the  Company,  Executive  shall also have the  powers,  duties and
responsibilities  that the  Company's  Bylaws  confer  on the  President  of the
Company.  Executive agrees to comply with such lawful policies of the Company as
may be adopted from time to time.  Although  Executive may be required to travel
from time to time for business reasons,  his principal place of employment shall
be the Company's corporate offices in San Jose, California.

          a. Executive shall devote  substantially all of his full business time
     and his best efforts,  skill,  and attention to the Company's  business and
     affairs and to promoting the Company's best interests.

          b.  Executive  shall  serve as a member  of the  Board  for as long as
     Executive continues to be nominated and elected.

          c.  Notwithstanding  the  foregoing,  nothing  herein  shall  preclude
     Executive from (i) serving on the boards of directors of other corporations
     and/or charitable organizations (subject to the approval of the Board, such
     approval not to be  unreasonably  withheld),  (ii)  engaging in  charitable
     activities  and  community   affairs,   and  (iii)  managing  his  personal
     investments  and affairs,  provided that such  activities do not materially
     interfere with the proper  performance  of his duties and  responsibilities
     hereunder.

     3.  Compensation.  For all of his services  during the Term of  Employment,
Executive shall receive the following compensation:

          a. Base Salary.  Executive's  annual base salary shall be  $1,500,000.
     The Board will review the Base Salary at least annually and may increase it
     at any time for any reason, in its sole discretion.

          b. Bonus. In addition to his Base Salary,  Executive shall be eligible
     to receive an annual cash  performance  bonus (the "Bonus") for each fiscal
     year ending during the Term of Employment  if, and to the extent that,  (x)
     except  with  respect to any Bonus  payable as  severance  under  paragraph
     4.b.i.1,  Executive remains employed by the Company on the last day of such
     fiscal  year  and  (y)  individual  or  corporate  performance   objectives
     established  by the Board are  achieved,  as  determined  by the Board or a
     committee  thereof in its sole  discretion.  Payment of the Bonus  shall be
     made at the same time that  other  senior-level  executives  receive  their
     bonuses,  and no later  than  March  15th of the  calendar  year  after the
     calendar  year  in  which  the  Bonus  is  earned.  The  target  level  for
     Executive's Bonus shall be established by the Board in its sole discretion,
     provided  that the minimum  target  level for any year shall be 100% of the
     Base Salary (the "Target Annual  Bonus").  However,  subject to the minimum
     Bonuses for the  Company's  fiscal  years ending  December  31,  2006,  and
     December 31, 2007,  set forth below,  Executive's  actual Bonus in any year
     may range from 0% to 200% of the Target Annual Bonus:

               i. For the  Company's  fiscal  year  ending  December  31,  2006,
          Executive  shall be entitled to receive a minimum Bonus of $2,250,000,
          to be paid no later than March 15, 2007 but no earlier than January 1,
          2007.

               ii. For the  Company's  fiscal year  ending  December  31,  2007,
          Executive  shall be entitled to receive a minimum Bonus of $1,500,000,
          to be paid no later than March 15, 2008 but no earlier than January 1,
          2008.

          c. Benefits. Executive shall be eligible to participate in all Company
     benefit  plans and  programs  as are  generally  available  for its  senior
     executives,  and his benefits shall be based on the terms of the applicable
     plan as  established  by the  Company  from time to time.  Nothing  in this
     Agreement  shall restrict the Company's  ability to change or terminate any
     or all of its employee  benefit plans and programs  from time to time;  nor
     shall  anything in this  Agreement  prevent any such change from  affecting
     Executive.

          d. Signing Bonus. In addition to the Base Salary and Bonus,  Executive
     shall be  entitled  to receive a one-time  payment of  $2,000,000,  payable
     within 15 days of the Start  Date.  If  Executive  resigns  his  employment
     without Good Reason or Executive's  employment is terminated by the Company
     for Cause, Executive shall repay a pro rata portion (based on the number of
     full calendar  months  remaining in the initial 24 month term divided by 24
     months) of the signing bonus (net of any  associated  income and employment
     taxes) within 10 days after such  resignation or termination of employment.
     Within 10 days after the filing of  Executive's  federal  income tax return
     for the year in which such  repayment is made,  Executive  shall pay to the
     Company  the  amount by which  Executive's  federal  and state  income  tax
     liability  for such  year was  reduced  as a result of such  repayment.  If
     Executive  resigns for Good Reason or Executive's  employment is terminated
     by the Company  without  Cause,  Executive  shall be entitled to retain the
     full amount of the signing bonus. The Company  acknowledges and agrees that
     the payment of Executive's  signing bonus is unrelated to any services that
     he performed in the State of California.

          e.  Success  Fee. In the event that the Company  files for  bankruptcy
     protection  under Chapter 11 of the United States  Bankruptcy  Code, if and
     when a plan of  reorganization  that is confirmed by the  bankruptcy  court
     becomes effective (the "Plan Effective Date") during  Executive's tenure as
     Chief  Executive  Officer of the  Company,  Executive  shall be entitled to
     receive a one-time  payment of $12,000,000  (the "Success  Fee"). If at any
     time after the Start  Date,  Executive  resigns  his  employment  with Good
     Reason or Executive's employment is terminated by the Company without Cause
     before the Plan Effective  Date,  Executive shall be entitled to payment of
     the Success Fee if the Plan  Effective  Date occurs  within 12 months after
     the date of termination  of employment.  In any case such Success Fee shall
     be due and  payable  on the Plan  Effective  Date.  Executive  shall not be
     entitled to all or any portion of the Success Fee if the Company terminates
     his employment  for Cause,  Executive  resigns his employment  without Good
     Reason or  Executive's  employment  terminates  due to death or  Disability
     before the Plan Effective Date.

          f.  Relocation.  Executive shall be reimbursed for the following costs
     associated with relocating to the San Jose, California, area:

               i. All reasonable  transaction  costs  (including any real estate
          brokerage  fees  Executive  incurs)  and moving  expenses  incurred by
          Executive,  in  each  case  while  an  employee  of  the  Company,  in
          connection  with moving his household goods from  Executive's  current
          residence  to the San Jose  area,  provided  that  Executive  provides
          appropriate documentation (the "Reimbursement").  Reimbursements under
          this  paragraph  3.f.i  shall be paid on or before  March  15th of the
          calendar year after the calendar year in which the applicable expenses
          were incurred.  In connection  with such payment,  during the calendar
          year after the  calendar  year in which the  applicable  expenses  are
          incurred,  the Company shall pay Executive an additional payment in an
          amount such that after the actual  payment by  Executive of all taxes,
          if any,  imposed  in  connection  with  the  Reimbursement,  Executive
          retains an amount equal to the Reimbursement;

               ii.  Reimbursement of all reasonable temporary housing and living
          expenses incurred by Executive,  in each case while an employee of the
          Company,  for the  shorter of (A) 9 months or (B) the period  from the
          Start Date until Executive moves to a residence of his choosing in the
          San Jose area.  Reimbursements  under this  paragraph  3.f.ii shall be
          paid on or before March 15th of the  calendar  year after the calendar
          year in which the applicable expenses were incurred.

          g. Legal Fees.  On or before  March 15,  2006,  the Company  shall pay
     Executive's  reasonable  legal fees  actually  incurred in an amount not to
     exceed $25,000 and reasonable fees incurred in connection with the services
     of an executive  compensation  consultant (but not to exceed  $25,000),  in
     each case directly  related to negotiation of Executive's  compensation and
     this Agreement.

     4. a. Termination of Employment.

               i.  Termination by the Company for Cause. The Board may terminate
          Executive's  employment  for  Cause at any time  after  (x)  providing
          Executive  with  10  days'  advance  written  notice   explaining  the
          circumstances  that justify the termination (a "Termination  Notice");
          and (y) except in the case of termination  for an event covered by (2)
          below,  providing  Executive with the opportunity to appear before the
          Board prior to any vote to terminate Executive's employment for Cause,
          which  opportunity may occur during the 10-day notice period.  "Cause"
          means any of the following:  (1)  Executive's  material  breach of any
          material term of this Agreement that if capable of being  corrected is
          not corrected within 10 days after delivery of a Termination Notice to
          Executive with respect to such breach; (2) Executive's  commission of,
          or formal charge or indictment  alleging  commission of, a felony, any
          crime involving  fraud, or any crime involving moral turpitude that in
          the case of a crime involving moral turpitude may adversely affect the
          business, standing or reputation of the Company or any other member of
          the Group (other than motor vehicle related);  (3) Executive's  breach
          of fiduciary duty to the Company or any other member of the Group; (4)
          Executive's  misappropriation  of funds or  material  property  of the
          Company or any other  member of the Group;  (5)  Executive's  repeated
          refusal to follow the lawful  directives of the Board; (6) Executive's
          fraud, dishonesty, disloyalty, gross negligence or willful misconduct,
          where  the  dishonesty,   disloyalty,   gross  negligence  or  willful
          misconduct has resulted,  or is likely to result,  in substantial  and
          material  damage to the Company or any other member of the Group,  and
          that if capable of being  corrected  is not  corrected  within 10 days
          after  delivery of a Termination  Notice to Executive  with respect to
          such  breach;  (7)  Executive's  material  violation  of  any  of  the
          Company's  Code of Conduct or  employment  policies that if capable of
          being  corrected is not corrected  within 10 days after  delivery of a
          Termination  Notice to Executive  with respect to such breach;  or (8)
          Executive's  knowing and material  violation of any federal,  state or
          local laws that will result in a direct or indirect  financial loss to
          the Company or any other member of the Group or damage the  reputation
          of the Company or any other member of the Group.

               ii.  Termination by the Company  without  Cause.  The Company may
          terminate  Executive's  employment under this Agreement  without Cause
          upon at least 30 days' prior written notice to Executive.

               iii. Death or Disability.  Executive's  employment by the Company
          will immediately terminate upon Executive's death and at the option of
          either  Executive or the Company,  exercisable  upon written notice to
          the other party,  may terminate upon the Executive's  Disability.  For
          purposes of this Agreement,  "Disability"  will occur if (A) Executive
          becomes  eligible for  benefits  under a long-term  disability  policy
          provided by the Company,  if any, or (B) Executive has become  unable,
          due to  physical or mental  illness or  incapacity,  to  substantially
          perform  the  essential  duties  of  his  employment  with  reasonable
          accommodation  for a  period  of 90 days or an  aggregate  of 180 days
          during  any  consecutive   12-month   period,   as  determined  by  an
          independent physician approved by the Company and Executive.

               iv.  Termination  by  Executive  for Good Reason.  Executive  may
          terminate his  employment  for Good Reason at any time.  "Good Reason"
          shall mean the  occurrence,  during the Term of Employment,  of any of
          the following  actions or failures to act, but in each case only if it
          is not  consented to by Executive in writing:  (A) a material  adverse
          change in Executive's duties,  reporting  responsibilities,  titles or
          elected or appointed  offices  (including the failure to be elected to
          the Company's Board) as in effect  immediately  prior to the effective
          date of such change  (including but not limited to the  appointment of
          any person to an executive position at the Company that is co-equal or
          senior to that of Executive);  (B) a material reduction by the Company
          in Executive's  Base Salary or Bonus or, solely to the extent provided
          in  paragraph  3.b,  bonus   opportunity,   in  each  case  in  effect
          immediately  prior  to the  effective  date  of  such  reduction;  (C)
          Company's  election  not to renew the initial  term or any  subsequent
          renewal term;  (D) the failure of the Company to obtain the assumption
          in  writing  of  its  obligation  to  perform  this  Agreement  by any
          successor to all or substantially  all of the assets of the Company on
          or prior to a merger,  consolidation,  sale or similar transaction; or
          (E) if the Company files for bankruptcy protection under Chapter 11 of
          the United States Bankruptcy Code, the failure of the bankruptcy court
          to  approve  this  Agreement  within  90 days  after  the date of such
          filing.  (For  purposes  of  this  definition,  none  of  the  actions
          described in clauses (A) and (B) above shall  constitute "Good Reason"
          with respect to Executive if it was an isolated and inadvertent action
          not taken in bad faith by the  Company  and if it is  remedied  by the
          Company  within 30 days after receipt of written  notice thereof given
          by  Executive  (or, if the matter is not  capable of remedy  within 30
          days,  then within a reasonable  period of time  following such 30 day
          period,  provided  that the Company has  commenced  such remedy within
          said thirty (30) day period);  provided that "Good Reason" shall cease
          to exist for any action  described in clauses (A) and (B) above on the
          60th day  following  the  later of the  occurrence  of such  action or
          Executive's knowledge thereof,  unless Executive has given the Company
          written notice thereof prior to such date.

               v.  Termination by Executive  without Good Reason.  Executive may
          terminate his employment under this Agreement without Good Reason upon
          at least 30 days' prior written notice to the Company.

          b. Consequences of Termination of Employment.

               i.  Termination by the Company  without Cause or by Executive for
          Good Reason.  Executive shall receive the severance  benefit described
          in this paragraph 4.b if the Company terminates Executive's employment
          without Cause (under paragraph  4.a.ii) at any time during the Term of
          Employment  or if  Executive  terminates  his  employment  at any time
          during  the  Term of  Employment  for  Good  Reason  (under  paragraph
          4.a.iv).

                    1.  Amount  and  Payment  Schedule.   Executive's  severance
               benefit  shall be an  annual  amount  equal to the sum of his (x)
               annual Base Salary and (y) Target Annual Bonus as of the date his
               employment  terminates,  paid  for  one  year,  provided  that if
               Executive is terminated in calendar year 2006 or 2007, in lieu of
               the Target Annual Bonus referenced in (y) above,  Executive shall
               receive his minimum Bonus for the applicable year as set forth in
               paragraph  3.b.i or 3.b.ii,  above.  Subject  to the timing  rule
               described in paragraph  4.b.i.2,  below,  the  severance  benefit
               shall be paid ratably on the same payment  schedule  that applied
               to Executive's salary at the time of his termination.

                    2.  Timing.  To the  extent  necessary  to  comply  with the
               restriction in Section 409A(a)(2)(B) of the Internal Revenue Code
               of 1986, as amended (the "Code") concerning payments to specified
               employees, the first severance payment to Executive shall be made
               on  the  first   installment  date  (determined  under  paragraph
               4.b.i.1,  above)  that is at least six months  after  Executive's
               termination   date.   The  first   payment   shall   include  any
               installments that would have been paid previously under paragraph
               4.b.i.1 were it not for this special  timing rule,  plus interest
               on  the  delayed  installments  at  an  annual  rate  (compounded
               monthly) equal to the federal short-term rate (as in effect under
               Section 1274(d) of the Code on Executive's termination date).

                    3. Benefits.  For a period of one year following the date of
               termination  of  Executive's  employment  from the  Company,  the
               Company shall at its sole cost and expense (but  disregarding any
               individual tax liability of Executive) provide Executive (and his
               spouse  and  eligible  dependents)  with  group  health  benefits
               substantially  similar to those  benefits that Executive (and his
               spouse and eligible dependents) were receiving immediately before
               his termination  (which may at the Company's election be pursuant
               to reimbursement of the applicable COBRA premium).

                    4. Excise Tax. If, in the written  opinion of the  Company's
               independent  accountants,  (x) any amount  payable  to  Executive
               under this Agreement is an "excess parachute  payment" as defined
               in Section  280G(b) of the Code,  and (y) such  excess  parachute
               payment is subject to the excise tax  imposed by Section  4999 of
               the Code (or any  similar  tax  under  state or local  law),  the
               Company  shall  pay to  Executive  an amount  necessary  to place
               Executive in the same after-tax position in which Executive would
               have  been  if  such  excise  tax  had  not  been   imposed  (the
               "Gross-Up).  The Gross-Up shall be in an amount determined by the
               Company's  independent  accountants  and shall be paid during the
               Payment Year (as hereinafter defined), on or before December 31st
               of such  Payment  Year  (subject to the  special  timing rule set
               forth  in  paragraph  4.b.i.2,   above).  For  purposes  of  this
               paragraph 4.b.i.4,  the "Payment Year" shall be the calendar year
               following  (A) with  respect to amounts  payable upon a change in
               ownership  or control  (within the meaning of Section  280G(b) of
               the Code), the calendar year in which such change in ownership or
               control  occurs or (B) with  respect  to amounts  payable  upon a
               termination  of  employment,  the  calendar  year in  which  such
               termination of employment occurs.

               ii.  Death  or  Disability.   In  the  event  of  termination  of
          Executive's  employment  due to death or Disability  (under  paragraph
          4.a.ii),  Executive shall be entitled to receive a pro rata portion of
          his Target  Annual Bonus for the portion of the  calendar  year before
          the date of termination of employment, payable on or before March 15th
          of the calendar year after the calendar year in which such termination
          of employment  occurs;  but Executive shall not be eligible to receive
          any other  severance  benefit  under  this  paragraph  4.  Executive's
          eligibility  (if any) to receive a  severance  or  retirement  benefit
          under any other severance or retirement plan or program  maintained by
          the Company  shall be  determined by the terms of that plan or program
          as in effect on his termination date.

               iii.  Termination  for  Cause or  Voluntary  Termination.  If the
          Company terminates  Executive's  employment for Cause (under paragraph
          4.a.i), or if Executive  terminates his employment without Good Reason
          (under  paragraph  4.a.v),  Executive shall not be eligible to receive
          any severance benefit under this paragraph 4. Executive's  eligibility
          (if any) to receive a severance or retirement  benefit under any other
          severance  or  retirement  plan or program  maintained  by the Company
          shall be  determined by the terms of that plan or program as in effect
          on his  termination  date. The foregoing  shall not limit the remedies
          available  to the Group,  at law or in  equity,  for any loss or other
          injury caused directly or indirectly by Executive.

               iv.  Earned but Unpaid  Bonus.  In addition to any other  amounts
          owed to Executive under this paragraph 4.b, if the Company  terminates
          the  Executive's  employment  for any reason after  December 31 of any
          year,  Executive  shall be  entitled  to receive  any Bonus  earned by
          Executive  for the preceding  year as  calculated  in accordance  with
          paragraph 3.b but not yet paid as of the termination date.

               v. Release. The Company will not be required to make the payments
          stated in this paragraph 4 unless the Executive  executes and delivers
          to the Company an agreement  releasing from all liability  (other than
          the payments  contemplated  by paragraph 4 of this  Agreement  and any
          indemnification  arrangement of the Company with respect to Executive)
          the  Group  and any of their  respective  past or  present  directors,
          officers,  employees,  shareholders,  controlling persons or agents of
          the Group.  This  agreement  will be in the form  normally used by the
          Company for senior executives at the time.

     5. Restrictive Covenants.

          a. Non-Competition. During the Term of Employment, Executive shall not
     directly or indirectly  manage,  operate,  participate  in, be employed by,
     perform  consulting  services  for, or  otherwise be  connected  with,  any
     company or other enterprise that would compete with or otherwise  adversely
     effect the  Company's  business or  otherwise  interfere  with  Executive's
     ability to devote his full time and attention to the Company. Executive may
     invest in an entity that  competes with the  Company's  business,  provided
     that  Executive and his immediate  family  members do not own more than one
     percent of the voting securities of any such entity at any time.

          b. Use and Disclosure of Proprietary Information.

               i.   Definition   of   Proprietary   Information.    "Proprietary
          Information" means confidential or proprietary information,  knowledge
          or data concerning (1) the Group's businesses, strategies, operations,
          financial affairs, organizational matters, personnel matters, budgets,
          business  plans,  marketing  plans,  studies,  policies,   procedures,
          products,  ideas,  processes,  software  systems,  trade  secrets  and
          technical  know-how,  (2) any other matter relating to the Group,  (3)
          any matter  relating  to clients of the Group or other  third  parties
          having   relationships   with  the  Group  and  (4)  any  confidential
          information  from  which  the  Group  derives  business  advantage  or
          economic  value.  Proprietary  Information  includes  (A)  information
          regarding any aspect of Executive's tenure as an employee of the Group
          or  the  termination  of  Executive's   employment,   (B)  the  names,
          addresses,  phone numbers and buying habits and  preferences and other
          information  concerning clients and prospective  clients of the Group,
          and (C) information and materials  concerning the personal  affairs of
          employees  of the Group.  In  addition,  Proprietary  Information  may
          include  information  furnished  to  Executive  orally  or in  writing
          (whatever the form or storage  medium) or gathered by  inspection,  in
          each  case  before or after  the date of this  Agreement.  Proprietary
          Information  does not  include  information  (X)  that was or  becomes
          generally  available to Executive on a non-confidential  basis, if the
          source of this information was not reasonably known to Executive to be
          bound by a duty of confidentiality,  (Y) that was or becomes generally
          available  to the public,  other than as a result of a  disclosure  by
          Executive, directly or indirectly, or (Z) that Executive can establish
          was  independently  developed  by Executive  without  reference to any
          Proprietary Information.

               ii. Acknowledgements.  Executive acknowledges that he will obtain
          or  create  Proprietary  Information  in  the  course  of  Executive's
          involvement in the Group's activities and may already have Proprietary
          Information.  Executive agrees that the Proprietary Information is the
          exclusive  property  of  the  Group.  In  addition,  nothing  in  this
          Agreement  will  operate  to weaken or waive any  rights the Group may
          have under  statutory  or common law, or any other  agreement,  to the
          prohibition of unfair  competition or the protection of trade secrets,
          confidential business information and other confidential information.

               iii.   During   Employment.   Executive  will  use  and  disclose
          Proprietary Information only for the Group's benefit and in accordance
          with any restrictions placed on its use or disclosure by the Group.

               iv.   Post-Employment.   After  the  termination  of  Executive's
          employment,  Executive  will  not  use  or  disclose  any  Proprietary
          Information for any purpose.  For the avoidance of doubt,  but without
          limitation of the foregoing, for the 18-month period after termination
          of Executive's  employment,  Executive will not directly or indirectly
          use  Proprietary  Information  from which the Group  derives  business
          advantage or economic benefit to solicit, impair or interfere with, or
          attempt to solicit,  impair or interfere  with,  any person or entity,
          who, at the time of the termination of Executive's employment, is then
          a  customer,  vendor  or  business  relationship  of the Group (or who
          Executive   knew  was  a  potential   customer,   vendor  or  business
          relationship  of the  Company  within  the  six  months  prior  to the
          termination of his Employment).

          c.  Non-Solicitation  of Employees.  During the Term of Employment and
     for  an  18-month  period  after  termination  of  Executive's  employment,
     Executive  will not  directly or  indirectly  solicit or attempt to solicit
     anyone who, at the time of the  termination of Executive's  employment,  is
     then an employee  of the Group (or who was an employee of the Group  within
     the six months prior to the  termination of his  Employment) to resign from
     the Group or to apply for or accept  employment  with any  company or other
     enterprise.

          d. Non-Disparagement. During and after Executive's employment with the
     Company, Executive covenants and agrees that Executive will not directly or
     indirectly  disparage  the  Company,  or  make  or  solicit  any  comments,
     statements, or the like to any clients, competitors,  suppliers,  employees
     or former employees of the Company,  the press, other media, or others that
     may be considered  derogatory or  detrimental  to the good name or business
     reputation of the Company.

     6.  Employment  Taxes.  All  payments  and other  compensation  under  this
Agreement  shall  be  subject  to  withholding  of  the  applicable  income  and
employment taxes. At the same time, however, Executive is solely responsible for
paying all required taxes on any payments or other  compensation  provided under
this Agreement (including imputed compensation), regardless of whether taxes are
withheld.

     7. Nonduplication of Benefits. No term or other provision of this Agreement
may be  interpreted  to require  the Company to  duplicate  any payment or other
compensation  that Executive is already entitled to receive under a compensation
or benefit plan, program, or other arrangement maintained by the Company.

     8. Indemnification.  To the fullest extent permitted by applicable law, the
Company  shall  provide  indemnification  for  Executive  under its  Articles of
Incorporation and Bylaws.  Executive shall be covered by the Company's  standard
indemnification   agreement  and  by  any  director's  and  officer's  liability
insurance policy maintained by the Company.

     9. Successors.  Any successor to the Company or to all or substantially all
of the Company's business and/or assets (whether a direct or indirect successor,
and  whether  by  purchase,  lease,  merger,   consolidation,   liquidation,  or
otherwise)  shall assume the obligations  under this  Agreement.  In case of any
succession,  the term "Company" shall refer to the successor.  The terms of this
Agreement and all of Executive's rights hereunder shall inure to the benefit of,
and be enforceable by, Executive's personal or legal representatives, executors,
administrators, successors, heirs, distributees, devisees, and legatees.

     10. No Third-Party Beneficiaries. Except as provided in paragraph 9, above,
nothing in this  Agreement  may confer  upon any person or entity not a party to
this Agreement any rights or remedies of any nature or kind whatsoever  under or
by reason of this Agreement.

     11.  No Duty to  Mitigate.  Executive  shall  not be  required  to seek new
employment or otherwise to mitigate the payments contemplated by this Agreement.
The payments  contemplated  by this  Agreement  shall not be reduced by earnings
that Executive may receive from any other source.

     12. Notice.  Notices and other  communications  between the parties to this
Agreement  shall be  delivered in writing and shall be deemed to have been given
when  personally  delivered or on the third  business day after  mailing by U.S.
registered or certified mail, return receipt requested and postage prepaid.

          a. Notices and other communications to Executive shall be addressed to
     Executive,  at the most recent home  address that he provided in writing to
     the Company.

          b. Notices and other  communications to the Company shall be addressed
     to the Company's corporate headquarters,  to the attention of the Company's
     Secretary.

     13. Waiver and Amendments.  No provision of this Agreement may be modified,
waived, or discharged,  unless the modification,  waiver, or discharge is agreed
to in writing  signed by Executive  and by an authorized  representative  of the
Company  (other  than  Executive).   Unless  specifically   characterized  as  a
continuing  waiver, no waiver of a condition or provision at any one time may be
considered  a waiver  of the  same  provision  or  condition  (or any  different
provision or condition) at any other time.

     14. Ability to Enter this Agreement. Executive represents and warrants that
neither the execution  and delivery of this  Agreement  nor the  performance  of
Executive's services hereunder will conflict with, or result in a breach of, any
employment  or  other  agreement  to  which  Executive  is a party  or by  which
Executive might be bound or affected.  Executive further represents and warrants
that Executive has full right,  power, and authority to enter into and carry out
the provisions of this Agreement.

     15. Remedy at Law Inadequate.  Executive  acknowledges that a remedy at law
for any breach or attempted breach of the covenants  described in paragraph 5 of
this Agreement will be inadequate and agrees that the Group shall be entitled to
specific  performance and injunctive and other  equitable  relief in the case of
any such breach or attempted breach.

     16.  American Jobs Creation Act of 2004. This Agreement shall be construed,
administered and interpreted in accordance with a good-faith  interpretation  of
Section  409A of the Code and Section 885 of the American  Jobs  Creation Act of
2004.  If the  Company  or  Executive  determines  that  any  provision  of this
Agreement  is or might be  inconsistent  with  such  provisions  (including  any
administrative  guidance issued  thereunder),  the parties shall make their best
efforts in good faith to agree to such  amendments  to this  Agreement as may be
necessary or appropriate to comply with such provisions.

     17. Choice of Law. This Agreement (including its validity,  interpretation,
construction,  and  performance)  shall be  governed by the laws of the State of
California,  without  regard to any rule or  principle  concerning  conflicts or
choice of law that might otherwise refer  construction or  interpretation to the
substantive law of another jurisdiction.

     18.  Section  Headings.  All  headings in this  Agreement  are inserted for
convenience only. Headings do not constitute a part of the Agreement and may not
affect the  meaning or  interpretation  of any term or other  provision  of this
Agreement.

     19.  Severability  and  Reformation.  Each  substantive  provision  of this
Agreement is a separate agreement,  independently supported by good and adequate
consideration, and is severable from the other provisions of the Agreement. If a
court of competent  jurisdiction  determines  that any term or provision of this
Agreement  is  unenforceable,  then  the  other  terms  and  provisions  of this
Agreement shall remain in full force and effect, and the unenforceable  terms or
provisions  shall be equitably  modified to the extent  necessary to achieve the
underlying purpose in an enforceable way.

     20. Whole Agreement.  This Agreement reflects the entire  understanding and
agreement between the Company and Executive  regarding  Executive's  employment.
This Agreement supersedes all prior negotiations,  discussions,  correspondence,
communications,   understandings,  and  agreements,  whether  oral  or  written,
relating to Executive's  employment with the Company.  The respective rights and
obligations  of the parties to this Agreement  shall survive the  termination of
Executive's  employment  to  the  extent  necessary  to  give  such  rights  and
obligations their intended effect.

     21. Counterparts.  This Agreement may be executed in counterparts,  each of
which shall be deemed an original,  but all of which together shall constitute a
single instrument.

                                      * * *


     IN WITNESS  WHEREOF,  the  parties to this  Agreement  have  executed  this
Agreement on December 20, 2005.

CALPINE CORPORATION:


By: /s/ Kenneth T. Derr                           /s/ Robert P. May
    ------------------------------                ------------------------------
      Kenneth T. Derr                               Robert P. May, in his
      Chairman of the Board of Directors            individual capacity