EMPLOYMENT AGREEMENT


     THIS AGREEMENT is entered into on the 16 day of December, 1994, by and
among  Thomas  L.  Patterson,  residing  at  1013 Vista Circle, Birmingham,
Alabama (herein called the "Employee"), TXEN, INC. (herein  called  "TXEN")
with a principal place of business at 10  Inverness  Center Parkway,  Suite
140,  Birmingham,  Alabama  35242, and NICHOLS RESEARCH CORPORATION, with a
principal  place  of  business  located  at  4040 Memorial  Parkway  South,
Huntsville, Alabama 35802 (herein called "NRC").

                       W I T N E S S E T H:

     WHEREAS,  TXEN  Company  is engaged in the business  of  managed  care
administration and providing information  systems  and  services to managed
care administrators;

     WHEREAS,  NRC,  as  purchaser, and TXEN, as seller, entered  into  and
consummated a Convertible  Preferred  Stock  Purchase Agreement dated as of
the date hereof (the "Purchase Agreement") whereby  NRC  acquired one share
of  Preferred  Stock of TXEN, and the Employee's continued employment  with
TXEN was a material inducement to NRC to enter into the Purchase Agreement;

     WHEREAS, NRC  has  also entered into a Stock Purchase Option Agreement
of even date herewith giving  NRC the option to purchase all of the capital
stock of TXEN owned by the Employee  together  with the capital stock owned
by the other shareholders of TXEN provided NRC converts the Preferred Stock
into Class B Common Stock; and

     WHEREAS, TXEN and NRC desire to obtain the services of the Employee as
President of TXEN and the Employee is willing to  render  such  services to
TXEN upon the terms and conditions herein set forth;

     NOW,  THEREFORE,  in  consideration  of the mutual promises set  forth
herein and other good and valuable consideration,  the  receipt of which is
hereby acknowledged, the parties agree as follows:

1.   DUTIES AND SALARY.

     (a)  TXEN  agrees  to employ the Employee and the Employee  agrees  to
accept employment by TXEN  on  a  full-time basis as President of TXEN at a
base salary of $8,000 per month payable  during  the Term of Employment, as
hereinafter defined.  Such salary shall be subject  to  increases from time
to  time  as  authorized  by the Board of Directors of TXEN (the  "Board"),
provided any increase in compensation  paid  to  the Employee shall require
the affirmative vote of the director or directors  elected  to the Board by
NRC so long as NRC owns any capital stock of TXEN.

     (b)  The  Employee hereby agrees to undertake such travel  as  may  be
required in the  performance of his duties.  The reasonable travel expenses
of the Employee shall be reimbursed in accordance with TXEN's reimbursement
policy, in effect from time to time.

     (c)  The Employee  shall  carry  out  his  duties  under  the  general
supervision of the Board or its designee.

     (d)  The    Employee's   duties   shall   include   the   duties   and
responsibilities identified  on  Schedule  I attached hereto.  The Employee
shall perform such other tasks and duties as  may be assigned by TXEN, from
time  to  time  and  TXEN reserves the right to change  the  office  and/or
position of the Employee  within  TXEN,  so long as such change is mutually
acceptable.  The Employee shall devote his  full time, attention, skill and
efforts to the tasks and duties assigned by TXEN.   The  Employee shall not
provide services, for compensation, to any other person or  business entity
while employed by TXEN without approval of the Board and NRC.

     (e)  The  Employee  shall  not  be  required  to  relocate beyond  the
Birmingham, Alabama, metropolitan area without his consent.

2.   TERM  OF EMPLOYMENT.  This Agreement shall commence  as  of  the  date
hereof and shall  end  four  years  from  the  date  hereof  (the  "Term of
Employment"),  unless  terminated  earlier  or extended as provided herein.
Upon expiration of the initial Term of Employment unless earlier terminated
as  provided  herein, the Term of Employment shall  continue  automatically
month-to-month  until  terminated by either party with at least thirty (30)
days' prior written notice  with  or  without  cause.   Notwithstanding the
foregoing,  if NRC purchases all of the capital stock of TXEN  pursuant  to
the Stock Purchase  Option  Agreement,  NRC  may  elect  to (1) immediately
terminate the Employee's employment or (2) extend the Employee's employment
for one year after the purchase of all of the capital stock  of TXEN by NRC
in which event the Term of Employment shall be extended by such  additional
period, unless terminated earlier as provided herein.

3.   TERMINATION  BEFORE EXPIRATION OF TERM OF EMPLOYMENT.  The termination
of the employment of  the  Employee during the Term of Employment may occur
in one of the following ways:

     (a)  BY TXEN, FOR CAUSE.   Termination  by  TXEN shall be deemed to be
for cause only upon:

          (i)  Employee's conviction of or pleading guilty to a felony;

          (ii) A good faith determination by the Board  that  the  Employee
               has  breached  either this Agreement, the Purchase Agreement
               or the Stock Purchase Option Agreement;

         (iii) Refusal  or failure  by  the  Employee,  without  reasonable
               excuse or  proper authorization, to carry out any reasonable
               instructions  of the Board consistent with Employee's rights
               or duties as set forth in this Agreement;

          (iv) Material breach  of this Agreement or any material breach of
               any agreement with NRC;

          (v)  The  Employee's  demonstration   of  negligence  or  willful
               misconduct in the execution of his duties, including without
               limitation breach of fiduciary duty  or  the duty of loyalty
               owed TXEN.

     If TXEN intends to terminate for cause, TXEN shall provide  notice  to
Employee  of  intent  to  terminate this Agreement, stating the termination
provision in this Agreement  relied  upon  and  setting forth in reasonable
detail  the  facts  and  circumstances  claimed  to  provide  a  basis  for
termination under the provisions so indicated, and shall  provide  Employee
with  an  opportunity  to  cure the alleged default or breach within thirty
(30) days of receipt of the  notice,  provided  that  if  the matter is not
curable  within  such  thirty  (30) day period, the Employee shall  not  be
deemed in default if the Employee  commences immediately to cure the matter
and proceeds diligently thereafter to  complete  the cure, further provided
that the alleged breach or default must be cured within ninety (90) days of
receipt of the notice.  TXEN shall not be required  to  give  more than one
notice with respect to the same matter.  Notwithstanding the foregoing,  no
notice  and no cure right shall be required with respect to termination for
cause under 3(a)(i) or an act involving theft of information or property of
TXEN.

     (b)  BY  TXEN, WITHOUT CAUSE.  Any termination of Employee by TXEN for
reasons other than  as  set  forth  in  subsections 3(a)(i) through 3(a)(v)
above  shall  be  a  termination without cause.   TXEN  may  terminate  the
employment of Employee  without  cause  by  thirty (30) days' prior written
notice at any time.  If NRC purchases all of  the  capital  stock  of  TXEN
pursuant  to  the  Stock  Purchase  Option Agreement, NRC may cause TXEN to
terminate the employment of Employee  without  cause  immediately after the
closing of such purchase and without giving 30 days' prior notice.

     (c)  BY  THE EMPLOYEE.  The Employee may by written  notice  terminate
his employment at any time during the Term of Employment:

          (i)  For any reason other than for Good Reason (as defined below)
               upon thirty (30) days' prior written notice at any time.

          (ii) For  "Good  Reason,"  defined  as  termination  because of a
               material breach by TXEN of this Agreement including, without
               limitation,  making  a  material  change  in  the Employee's
               duties, responsibilities or authority as set forth  in  this
               Agreement,  without  his  express  written  consent.  In all
               cases  in  which  Employee  intends  to terminate  for  Good
               Reason,  the  Employee  shall provide TXEN  with  notice  of
               intent to terminate this  Agreement,  stating  the facts and
               circumstances  giving  rise  to  a  breach of this Agreement
               claimed  to  provide  a  basis  for  termination  under  the
               provisions  so  indicated, and shall provide  TXEN  with  an
               opportunity to cure  the  alleged  default  or breach within
               thirty (30) days of receipt of the notice, provided  that if
               the  matter  is  not  curable  within  such  thirty (30) day
               period, TXEN shall not be deemed in default if  it commences
               immediately  to  cure  the  matter  and  proceeds diligently
               thereafter to complete the cure, further provided  that  the
               alleged  breach  or default must be cured within ninety (90)
               days  of receipt of  the  notice.   Employee  shall  not  be
               required  to  give more than one such notice with respect to
               the same matter.

     (d)  DEATH OF THE EMPLOYEE.

     (e)  DISABILITY OF EMPLOYEE.   If,  during  the  Term of Employment, a
          physician  selected  by  TXEN  determines that the  Employee  has
          become physically or mentally disabled  so  as  to  be  unable to
          carry out the normal and usual duties of his employment for three
          (3)  continuous  months,  and reasonable accommodation cannot  be
          made to allow the Employee  to  continue  to  perform  his duties
          full-time,  his  employment  hereunder  may be terminated at  the
          election of TXEN or the Employee.

4.   CONSEQUENCES OF TERMINATION.  The termination  of  the  employment  of
Employee will cause the following results:

     (a)  If  the  termination  is by TXEN for cause, or is by the Employee
for any reason other than for Good  Reason,  TXEN  will  pay  the  Employee
within  five (5) days after the date of termination any unpaid salary,  the
amount of any accrued annual vacation pay to which he may be entitled under
TXEN's vacation plan, and benefits.  All such compensation and benefits (if
any) shall be paid only through the date termination occurs.

     (b)  If  the  termination is by TXEN without cause or because of death
or disability, TXEN  shall  pay to the Employee, in addition to the amounts
set forth in 4(a) above, an amount  equal  to  fifty  percent  (50%) of the
Employee's monthly base salary then in effect in monthly installments  over
a three-month period immediately following the termination.

     (c)  If the termination is by the Employee for Good Reason, TXEN shall
pay to the Employee, in addition to the amounts set forth in 4(a) above, an
amount  equal  to fifty percent (50%) of the Employee's monthly base salary
then  in  effect  in   monthly   installments  over  a  three-month  period
immediately following the termination.

     (d)  In the event of the Employee's death or disability, the following
provisions will apply:

          (i)  Upon his death, the  Employee's  estate  will be entitled to
               receive  the  amount  set  forth  in  Section 4(b)  and  the
               benefits set forth in any plans of TXEN  then  in effect and
               applicable  under  the circumstances.  The Employee  or  his
               estate  shall  be  entitled  to  no  other  compensation  or
               benefits in the event of death.

         (ii)  Upon termination on  account of disability, Employee will be
               entitled to receive the amount set forth in Section 4(b) and
               the benefits set forth  in  any plans of TXEN then in effect
               and applicable under the circumstances.  The Employee or his
               personal  representative  shall  be  entitled  to  no  other
               compensation or benefits in the event of disability.

     (e)  The Employee shall not be required  to  mitigate  the  amount  of
payment provided for in this Section 4 by seeking employment.

     (f)  The  amounts  set forth above in this Section 4 shall be paid and
received in complete discharge  of any other obligation of TXEN (or NRC) to
Employee resulting from termination of his employment.

5.   FRINGE BENEFITS.

     The Employee shall participate in any group health insurance, vacation
and sick leave plans, and other benefit plans available to all employees of
TXEN in accordance with their terms  and conditions which may be amended or
terminated by TXEN at any time.

6.   NON-DISCLOSURE COVENANTS AND PROPRIETARY MATTERS.

     (a)  Unless authorized or instructed  in  writing by TXEN and NRC, the
Employee shall not, except as required in the conduct  of  TXEN's business,
during or at any time after the Term of Employment, disclose  to others, or
use,  any of NRC's or TXEN's inventions or discoveries or their  respective
secret  or  confidential  information or data (oral, written, or in machine
readable form) which the Employee  may  obtain  during  the course of or in
connection  with  the  Employee's  employment,  including such  inventions,
discoveries, information, know-how or data relating to machines, equipment,
products,  systems,  software,  contracts, contract  performance,  research
and/or   development,   designs,   compositions,    formulae,    processes,
manufacturing  procedures or business methods, whether or not developed  by
the Employee, by  others  in  NRC  or  TXEN or obtained by NRC or TXEN from
third  parties,  and  irrespective  of  whether  or  not  such  inventions,
discoveries, information, knowledge or data  have been identified by NRC or
TXEN as secret or confidential, unless and until,  and  then  to the extent
and  only  to  the  extent that, such inventions, discoveries, information,
knowledge or data become  available  to  the  public  otherwise than by the
Employee's act or omission.

     (b)  The  Employee  shall not, except as required in  the  conduct  of
TXEN's business, disclose to others, or use, any of the information (which,
if disclosed or used, could  be harmful to NRC or TXEN) relating to present
and prospective customers of NRC  or  TXEN,  business  dealings  with  such
customers,  prospective  sales and advertising programs and agreements with
representatives or prospective  representatives  of NRC or TXEN, present or
prospective sources of supply or any other business  arrangements of NRC or
TXEN, including but not limited to customers, customer lists, costs, prices
and earnings, whether or not such information is developed by the Employee,
by others in NRC or TXEN or obtained by NRC or TXEN from third parties, and
irrespective of whether or not such information has been  identified by NRC
or TXEN as secret or confidential, unless and until, and then to the extent
and  only  to  the extent that, such information becomes available  to  the
public otherwise than by the Employee's act or omission.

     (c)  The Employee  agrees  to  disclose  immediately  to  TXEN  or any
persons  designated  by  it  and  to  assign  to  TXEN or its successors or
assigns, all inventions made, discovered, or first  reduced  to practice by
the Employee, solely or jointly with others, during the Term of  Employment
or  within  a  period  of  six  months from the date of termination of such
employment (either during or outside  of  the  Employee's working hours and
either on or off TXEN's premises), which inventions are made, discovered or
conceived  either in the course of such employment,  or  with  the  use  of
TXEN's time,  material,  facilities or funds, or which are directly related
to any investigations or obligations  undertaken  by TXEN; and the Employee
hereby grants and agrees to grant the right to TXEN  and  its  nominees  to
obtain,  for  its own benefit and in its own name (entirely at its expense)
patents and patent  applications including original, continuation, reissue,
utility  and  design  patents,   and  applications,  patents  of  addition,
confirmation patents, registration  patents, petty patents, utility models,
and  all  other  types  of  patents and the  like,  and  all  renewals  and
extensions of any of them for  those  inventions  in any and all countries;
and  the  Employee  shall assist TXEN, at TXEN's expense,  without  further
charge during the term  of the Employee's employment, and after termination
of the Employee's employment  at  the  same base salary rate (excluding any
bonuses, incentive or deferred compensation  or  other  benefits  and based
upon  a  forty  hour  work  week) as during the last year of the Employee's
employment  (determined on an  hourly  basis  for  this  purpose),  through
counsel designated  by  TXEN, to execute, acknowledge, and deliver all such
further papers, including  assignments, applications for Letters Patent (of
the United States or of any  foreign  country), oaths, disclaimers or other
instruments and to perform such further acts, including giving testimony or
furnishing   evidence   in  the  prosecution   or   defense   of   appeals,
interferences, suits and controversies relating to any aforesaid inventions
as may reasonably be deemed necessary by TXEN or its nominees to effectuate
the vesting or perfecting  in  TXEN or its nominees of all right, title and
interest   in   and   to  said  inventions,   applications   and   patents.
Notwithstanding the foregoing, the Employee need not take any action called
for under this Section 6(c) which will cause undue personal hardship to the
Employee.

     (d)  The Employee  agrees  to  disclose  immediately  to  TXEN  or any
persons  designated  by  it  and  to  assign to TXEN, at its option, or its
successors  or assigns, all works of authorship,  including  all  writings,
computer programs,  software,  and  firmware,  written  or  created  by the
Employee solely or jointly with others, during the course of his employment
by  TXEN  (either  during  or  outside  of the Employee's working hours and
either on or off TXEN's premises), which works are made or conceived either
in the course of such employment, or with the use of TXEN's time, material,
facilities or funds, or which are directly related to any investigations or
obligations undertaken by TXEN; and the Employee  hereby  agrees  that  all
such  works  are  works  made for hire, of which TXEN is the author and the
beneficiary of all rights  and protections afforded by the law of copyright
in any and all countries; and  the  Employee  will  assist  TXEN  at TXEN's
expense  without  further  charges  during the term of his employment,  and
after termination of his employment at the same base salary rate (excluding
any  bonuses,  incentive or deferred compensation  or  other  benefits)  as
during the last  year  of his employment (determined on an hourly basis for
this purpose assuming a  forty  hour work week), through counsel designated
by TXEN, to execute, acknowledge,  and  deliver  all  such  further papers,
including  assignments,  applications  for copyright registration  (in  the
United  States  or in any foreign country),  oaths,  disclaimers  or  other
instruments, and  to  perform such further acts, including giving testimony
or  furnishing  evidence   in   the  prosecution  or  defense  of  appeals,
interferences, suits and controversies  relating to any aforesaid works, as
may  be  deemed  necessary by TXEN or by its  nominees  to  effectuate  the
vesting or perfecting in TXEN or its nominees of all rights and interest in
and to said works  and  copies  thereof,  including the exclusive rights of
copying and distribution.

     (e)  The  Employee  shall  keep  complete,   accurate   and  authentic
accounts,  notes,  data  and records of all inventions made, discovered  or
developed and all works of authorship written or created by the Employee as
aforesaid in the manner and form requested by TXEN.

     (f)  All  computer or  other  hardware,  computer  software,  computer
programs, source  codes,  object codes, magnetic tapes, printouts, samples,
notes, records, reports, documents, customer lists, photographs, catalogues
and other writings, whether  copyrightable  or  not, relating to or dealing
with TXEN's or NRC's business and plans, and those  of  others entrusted to
TXEN  or NRC, which are prepared or created by the Employee  or  which  may
come into  his  possession during or as a result of his employment, are the
property of TXEN  or  NRC,  as  applicable,  and  upon  termination  of his
employment,  the  Employee  agrees  to  return  all such computer software,
computer programs, source codes, object codes, magnetic  tapes,  printouts,
samples,  notes,  records, reports, documents, customer lists, photographs,
catalogues and writings and all copies thereof to TXEN or NRC.

7.   NON-SOLICITATION  AND  NON-COMPETITION.  During the Restriction Period
(as hereinafter defined) within  the United States of America, the Employee
shall not directly or indirectly:

     (a)  Solicit the business of  TXEN  from  any  customer of TXEN or any
entity controlled by TXEN or solicit any employees of  TXEN  to  leave  the
employ of TXEN.

     (b)  Directly or indirectly, hire any employees or former employees of
TXEN  or  any  entity  controlled  by  TXEN  within one year of the date of
termination of his employment with TXEN or cause  any entity with which the
Employee is affiliated to hire any such employees or  former  employees  of
TXEN.

     (c)  Engage  in,  represent  in  any  way  or  be  connected  with, as
consultant,  officer,  director,  partner,  employee, sales representative,
proprietor, stockholder or otherwise (except  for  the  ownership of a less
than 1% stock interest in a publicly-traded corporation where  Employee  is
not  in  a management or control position), any business competing with the
business of  TXEN  as  conducted  by  TXEN on the date hereof or during the
period of Employee's employment by TXEN.

     (d)  As used herein, the Restriction  Period  shall  mean  the  period
while the Employee is employed by TXEN and the following periods:

          (i)  36  months after the date the Employee ceases to be employed
     by TXEN and/or

          (ii)  60 months  after  NRC purchases all of the capital stock of
     TXEN pursuant to the Stock Purchase Option Agreement.

     The  above periods in sections  7(d)(i)  and  7(d)(ii)  shall  not  be
mutually exclusive.   For  example,  if  NRC purchases the capital stock of
TXEN more than 36 months after the Employee  ceases to be employed by TXEN,
the Restriction Period of 7(d)(ii) shall apply  even though the Restriction
Period of 7(d)(i) also applied.  Similarly, if the  Employee  ceases  to be
employed  by TXEN more than 60 months after NRC purchases the capital stock
of TXEN, the  Restriction Period of section 7(d)(i) shall apply even though
the Restriction Period of 7(d)(ii) also applied.

8.   NO CONFLICT.   Employee represents and warrants that he is not a party
to or otherwise subject to or bound by the terms of any contract, agreement
or understanding which  in  any  manner would limit or otherwise affect his
ability to perform his obligations  hereunder, including without limitation
any contract, agreement or understanding  containing  terms  and provisions
similar  in  any  manner  to  those  contained  in Sections 6 and 7 hereof.
Employee  covenants  to  indemnify  and hold NRC, TXEN  and  any  of  their
affiliates harmless from any cost or damages (including attorneys' fees and
expenses) resulting from any breach of the provisions of this Agreement.

9.   SURVIVAL OF COVENANTS, EFFECT.

     (a)  The covenants on the part of  the  Employee contained or referred
to in Sections 6 and 7 above shall survive termination  of  this Agreement,
and  the existence of any claim or cause of action of the Employee  against
TXEN or  NRC,  whether  predicated  on  this  Agreement  or otherwise.  The
Employee  agrees  that  a  remedy  at  law for any breach of the  foregoing
covenants contained or referred to in Sections 6 and 7 would be inadequate,
that TXEN and NRC would suffer irreparable  harm  as  a result and that NRC
and/or TXEN shall be entitled to a temporary and permanent injunction or an
order for specific performance of such covenants without  the  necessity of
proving actual damage to NRC or TXEN and without the posting of any bond or
other  security.   Any  breach  of this Agreement by TXEN or NRC shall  not
release the Employee from his obligations under Sections 6 and 7 hereof.

     (b)  The Employee hereby represents and acknowledges that NRC and TXEN
are relying on the covenants in Sections  6  and  7  in  entering into this
Agreement and the Purchase Agreement and other agreements  related  thereto
and that the restrictions in Sections 6 and 7 are fair and reasonable.  The
Employee  acknowledges that TXEN does business throughout the United States
and that the  geographic  scope  of the covenants in Section 7 is therefore
reasonable and necessary to protect the interests of TXEN.

     (c)  It is the intent of the parties that the provisions of Sections 6
and 7 shall be enforced to the fullest  extent  permissible  under the laws
and  public policies of each jurisdiction in which enforcement  is  sought.
If any  particular provision of Sections 6 and 7 shall be adjudicated to be
invalid or  unenforceable,  such  provision(s) of Sections 6 and 7 shall be
deemed amended to provide restrictions  to  the  fullest extent permissible
and consistent with applicable law and policies, and  such  amendment shall
apply  only  with  respect  to  the  particular jurisdiction in which  such
adjudication is made.  If such deemed  amendment  is  not  allowed  by  the
adjudicating  body, the offending provision, only, shall be deleted and the
remainder of Sections 6 and 7 shall not be effected.

10.  ASSIGNMENT.

     The rights  and  obligations  of  TXEN  under  this  Agreement  may be
assigned  by  TXEN  to  NRC  or to any other successors in interest of TXEN
and/or NRC of that part of the  business  of  TXEN  or  NRC  to  which this
Agreement  applies  or to their respective affiliates.  This Agreement  may
not be assigned and any  duties of the Employee may not be delegated by the
Employee, but any amounts  owing to the Employee upon his death shall inure
to the benefit of his estate.

11.  NOTICES.

     All notices or other communications which may be or are required to be
given, served or sent by either  party  to the other party pursuant to this
Agreement shall be in writing, addressed  to  its/his residence or place of
business as set forth above, and shall be mailed  by  first-class certified
mail, return receipt requested, postage prepaid, next-day  air delivery, or
transmitted  by  facsimiles  or  hand  delivery.   Such  notice  or   other
communication  shall be deemed sufficiently given, served, sent or received
for all purposes  at  such  time  as it is delivered to the addressee or at
such time as delivery is refused by  the addressee upon presentation.  Each
party may designate by notice in writing  an address to which any notice or
communication may thereafter be so given, served  or  sent.   Any notice or
other  communication  sent by Employee to TXEN shall also be sent,  at  the
same time, to NRC.  Notices hand delivered to TXEN or NRC must be delivered
to an officer of TXEN and  NRC  and  all other notices shall be sent to the
attention of the Board, in the case of  TXEN,  or  to the President, in the
case of NRC.

12.  APPLICABLE LAW JURISDICTION.

     This  Agreement  has  been negotiated and executed  in  the  State  of
Alabama, and it shall be governed  by, construed and enforced in accordance
with the internal substantive laws and  not  the choice of law rules of the
State of Alabama.

13.  EFFECTIVENESS/INTERPRETATION.

     The  parties  acknowledge  and  agree  that this  Agreement  has  been
negotiated  at  arm's  length  between  parties equally  sophisticated  and
knowledgeable  in  the  matters dealt with herein.   Each  party  has  been
represented by counsel of  its  or his own choosing.  Accordingly, any rule
of  law  or  legal  decision  that  would  require  interpretation  of  any
ambiguities in the Agreement against  the  party  that  drafted  it  is not
applicable and is waived.

14.  THIRD PARTY BENEFICIARY.

     NRC  is  a  third party beneficiary to this entire Agreement but shall
have no liability  to  pay the compensation due Employee and to perform the
other obligations of TXEN  hereunder.  NRC is not a guarantor of any of the
TXEN obligations hereunder.

15.  SEVERABILITY.

     If any of the articles, sections, paragraphs, clauses or provisions of
this Agreement shall be held  by  a court of last resort to be invalid, the
remainder of this Agreement shall not be affected thereby.

16.  ENTIRE AGREEMENT.

     The  foregoing  contains  the entire  agreement  between  the  parties
relating to the subject matter of this Agreement, and may not be altered or
amended except by an instrument  in  writing  approved  by TXEN and NRC and
signed  by  the  parties  hereto, and this Agreement supersedes  all  prior
understandings and agreements  relating  to  employment  of the Employee by
TXEN.   The  parties acknowledge that any prior oral or written  agreements
between NRC and  the  Employee, if any, are hereby terminated.  The parties
acknowledge that the Employee  and  NRC have also entered into the Purchase
Agreement and Stock Purchase Option Agreement which shall be in addition to
and not in lieu of the provisions of this Agreement.

     IN WITNESS WHEREOF, TXEN and NRC  have  caused  this  Agreement  to be
executed  by  their  duly authorized officers and the Employee has hereunto
set his hand as of the date first above written.

                                        TXEN, INC.

                                              Thomas L. Patterson
                                        By:_________________________________
                                             Thomas L. Patterson, President



                                         NICHOLS RESEARCH CORPORATION

                                             Louis Rachmeler
                                         By:________________________________
                                             Its Vice President Acquisitions

                                         Thomas L. Patterson
                                         ___________________________________
                                         Thomas L. Patterson, Employee


                                  SCHEDULE I

                               Duties of Employee

Thomas L. Patterson, President

(i)       to promote the  growth  of and manage the business and day to day
          operations of TXEN;

(ii)      to perform the duties normally  associated  with  the  Office  of
          President or such other office to which Employee may be nominated
          and  appointed  by the Board, subject to control and direction of
          the Board;

(iii)     to train and supervise  TXEN's  employees and to perform or cause
          to  be  performed  quality  control for  projects  and  contracts
          performed by TXEN;

(iv)      to manage and/or actually assist  in  the bidding and performance
          of major or material projects and contracts undertaken by TXEN;

(v)       to  direct  and  supervise  the  sale  and  marketing  of  TXEN's
          contracts,   services   and  products  and,  if  requested,   the
          contracts, services and products of NRC;

(vi)      to  perform  such  other  and/or   different  duties  as  may  be
          determined or delegated by the Board,  consistent with the duties
          of the President.