Exhibit 10.28

                              AMENDMENT NO. 11 TO CREDIT AGREEMENT AND WAIVER


        AMENDMENT  and  WAIVER  dated  as  of  January  21,  2000  among  PERINI
CORPORATION  (the  "Borrower"),  the banks listed on the signature  pages hereof
(collectively,  the "Banks"),  and MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as
Agent (the "Agent").


                              W I T N E S S E T H :

        WHEREAS, the Borrower, the Banks and the Agent are parties to an Amended
and  Restated  Credit  Agreement  dated as of January  17,  1997 (as  heretofore
amended, the "Credit Agreement");

        WHEREAS,  Section 6.01(p) of the Credit Agreement provides that an Event
of Default  shall occur if the  $3,000,000  Letter of Credit  issued in favor of
Perini/Suitt (the  "Perini/Suitt  LC") shall not have expired or been terminated
on or before January 21, 2000 or the Capital Restructuring shall not have become
effective on or before January 21, 2000;

        WHEREAS,  the Borrower has informed the Banks that the  Peirni/Suitt  LC
will not expire or  terminate  on or before  January  21,  2000 and the  Capital
Restructuring will not become effective on or before January 21, 2000;

        WHEREAS,  the Borrower has failed to reimburse  Harris Trust and Savings
Bank ("Harris Bank") for the amount of a drawing under a letter of credit issued
by Harris Bank, as described in the Forbearance  Agreement dated as of September
23, 1999 among Harris Bank,  the Borrower and Perini  Building  Corporation  (as
amended, the "Forbearance Agreement");

        WHEREAS,  the Borrower's  failure to reimburse  Harris Bank when due for
the  amount of such  drawing  (the  "Harris  Default")  constitutes  an Event of
Default under the Credit Agreement,  and the Borrower has requested an extension
of the previous waiver granted with respect to the Harris Default;

        WHEREAS,   the   Borrower   and  the  Banks   wish  to  record   certain
understandings  in connection  with the letter dated  December 8, 1999 among the
Banks,  the Borrower and Ronald N. Tutor (the "Term Sheet Cover Letter") and the
Term Sheet attached thereto (as modified by changed pages distributed subsequent
to the initial distribution of execution pages, the "Term Sheet");

        WHEREAS,  the  parties  have  agreed to amend the  Credit  Agreement  as
provided  herein,  and at the request of the  Borrower  the Banks have agreed to
grant the waiver provided herein;

         NOW, THEREFORE, the parties hereto agree as follows:


        Section 1. Definitions.  Unless otherwise  specifically  defined herein,
each term used herein  which is defined in the Credit  Agreement  shall have the
meaning  assigned  to such  term in the  Credit  Agreement.  Each  reference  to
"hereof",  "hereunder",  "herein" and "hereby" and each other similar  reference
and  each  reference  to  "this  Agreement"  and each  other  similar  reference
contained in the Credit  Agreement shall from and after the date hereof refer to
the Credit Agreement as amended hereby.

        Section 2. Amendment to Perini/Suitt LC and Capital  Restructuring Event
of Default.  Section 6.01(p) of the Credit Agreement is amended by deleting each
of the  references to "January 21, 2000" therein and inserting  "March 15, 2000"
in lieu thereof.

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       Section 3. Waiver  With  Respect to the Harris  Default.  Solely for the
period  from  January  27,  1999  through  and  including  the  "Harris   Waiver
Termination  Date" (as  defined  below),  the  Banks  hereby  waive the  Default
existing under the Credit  Agreement due solely to the Harris  Default.  As used
herein, "Harris Waiver Termination Date" means the earlier of March 15, 2000 and
the first date, if any, when any of the following events shall occur:

        (a)     A  "Standstill  Termination"  (as  defined  in  the  Forbearance
                Agreement) shall occur; or

        (b)     Harris Bank shall  exercise any rights or remedies  available to
                it in connection with the Harris Default.

        Section 4.  Amendment  and Waiver  Fee.  (a) In  consideration  for this
Amendment  and  Waiver,  the  Borrower  agrees to pay to the Agent a fee for the
account  of the  Banks in the  aggregate  amount  of  $100,000  (to be shared in
proportion to their aggregate Commitments).

        (b) In addition,  if by February 20, 2000 the Borrower or any Subsidiary
have not received at least  $14,000,000  of Net Proceeds from the  completion of
the specified real estate sales and headquarters  refinancing referred to in the
Term  Sheet,  the  Borrower  shall  pay to the Agent an  additional  fee for the
account  of the  Banks in the  aggregate  amount  of  $33,333  (to be  shared in
proportion to their aggregate Commitments).

        Section 5. Certain Understandings in Connection with the Term Sheet. For
purposes  of  recording  certain  further  understandings  between  the  parties
concerning, and in certain respects modifying, the Term Sheet, the Banks and the
Borrower note (subject to the  reservations  in the Term Sheet Cover Letter) the
following:

        (a) the Banks will  credit the fee paid by the  Borrower  in  accordance
with  Section  4(a)  of  this   Amendment   and  Waiver   against  the  $200,000
restructuring  fee  contemplated  by the Term Sheet to be paid at the closing of
the proposed new credit  agreement  between the Borrower and the Banks (the "New
Credit Agreement"); and

        (b) regardless of the actual  closing date of the New Credit  Agreement,
(i) the maturity date for final repayment of the term loans  contemplated by the
Term Sheet will be the last business day of December,  2002 (and the schedule of
required  amortization  will be  based  on this  date,  beginning  with the last
business  day of  March,  2000),  (ii) the  termination  date for the  revolving
commitments  under the New Credit  Agreement will be January 21, 2003, (iii) the
outside date by which the revolving  commitments must be reduced to no more than
$21 million will be April 20, 2000 and (iv) the  determination of the Borrower's
obligation to pay the three installments of supplemental restructuring fees will
be measured  by a number of days (30,  60 and 90) from  January 21, 2000 (but in
the case of the first such installment,  if the deadline falls before the actual
closing  date,  such  installment  will not apply,  having been paid pursuant to
Section 4(b)).

        Section 6.  Representations  and  Warranties  Correct;  No Default.  The
Borrower represents and warrants that on and as of the date hereof, after giving
effect to this Amendment and Waiver, (a) the  representations  and warranties of
each Obligor contained in each Financing Document,  as amended, to which it is a
party are true and (b) no Default under the Credit Agreement exists.

        Section 7. Effect of  Amendments  and Waiver.  Except as  expressly  set
forth herein,  this  Amendment  and Waiver shall not  constitute an amendment or
waiver of any term or condition of the Credit  Agreement or any other  Financing
Document,  and all such  terms and  conditions  shall  remain in full  force and
effect and are hereby ratified and confirmed in all respects.

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        Section 8. Governing Law. This Amendment and Waiver shall be governed by
and construed in accordance with the laws of the State of New York.

        Section 9. Counterparts.  This Amendment and Waiver may be signed in any
number of counterparts, each of which shall be an original, with the same effect
as if the signatures thereto and hereto were upon the same instrument.

        Section 10. Consent by Subsidiary Guarantors.  By signing this Amendment
and Waiver below,  each Subsidiary  Guarantor  affirms its obligations under the
Subsidiary  Guarantee  Agreement and acknowledges that this Amendment and Waiver
shall not alter, release, discharge or otherwise affect any of such obligations,
all of which shall  remain in full force and effect and are hereby  ratified and
confirmed in all respects.

        Section  11.  Effectiveness.  This  Amendment  and Waiver  shall  become
effective as of the date hereof when the Agent shall have received:

        (a) duly executed counterparts hereof signed by the Borrower,  each Bank
and each  Subsidiary  Guarantor  (or,  in the  case of any  party as to which an
executed counterpart shall not have been received, the Agent shall have received
telegraphic, telex or other written confirmation from such party of execution of
a counterpart hereof by such party); and

        (b) the fee payable under Section 4 of this Amendment and Waiver.



        IN WITNESS  WHEREOF,  the parties  hereto have caused this Amendment and
Waiver to be duly  executed by their  respective  authorized  officers as of the
date first above written.

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