Exhibit 10.1

                           Second Addendum to Form of
                       Employment and Severance Agreement
            For Senior Vice Presidents and Executive Vice Presidents
                     of Springfield Institution for Savings

This  Addendum is made  effective  as of the _____ day of April,  1997 is by and
between  ___________________  (the "Executive") and the SPRINGFIELD  INSTITUTION
FOR SAVINGS, a Massachusetts savings bank (the "Bank")

Recitals:
A. The Executive and the Bank have  previously  entered into an "Employment  and
Severance  Agreement"  dated  ____________and  a first  "Addendum to the Form of
Employment  and  Severance  Agreement"  dated March 31, 1996  (collectively  the
"Agreement"); and

B. On June 21, 1996, the Bank  reorganized  into a bank holding  company form of
organization (the "Reorganization"),  where the Bank has become the wholly-owned
subsidiary  of SIS Bancorp,  Inc.,  as the parent  company of the Bank,  and the
Board of Directors of the Bank have  determined that it is in the best interests
of the Bank to amend the  Agreement  to modify  the  definition  of  "Change  in
Control"; and

C. The  Executive  is willing to agree to such a  modification  on the terms and
conditions outlined herein,

NOW,  THEREFORE,  in return for the mutual covenants herein,  and other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged by the parties hereto, it is agreed as follows:

1.  Modification of Agreement:
(I) Section 2(c) of the Agreement is hereby  amended and restated by deleting it
in its entirety and replacing it with the following language:

         (c)  "Change in Control" means:
         (i) a change in control of the Bank, or of any parent  holding  company
         of  the  Bank  (the  "Parent  Company")  which  has  its  common  stock
         registered  under the Securities  Exchange Act of 1934, as amended (the
         "Exchange  Act"),  of a nature that would be required to be reported in
         response to Item 1 of a current report on Form 8-K, as in effect on the
         date hereof, pursuant to Section 13 or 15(d) of the Exchange Act ;

         (ii) a change in  control of the Bank  within the  meaning of 12 U.S.C.
         ss.1817(j),  the  Change  in Bank  Control  Act or any  acquisition  of
         control of the  Parent  Company  by any  company  or person  within the
         meaning of 12 U.S.C.  ss.1841(a)(2),  the Bank  Holding  Company Act of
         1956, as amended, or 12 U.S.C.  ss.1817(j),  the Change in Bank Control
         Act, as applicable;

         (iii)  individuals  who constitute the Board of Directors of the Parent
         Company as of the date of this Addendum (the  "Incumbent  Board") cease
         for any reason,  to  constitute at least a majority  thereof,  provided
         that any person becoming a director subsequent to the effective date of
         this  Addendum  whose  election  was  approved  by a vote  of at  least
         three-quarters of the directors then comprising the Incumbent Board, or
         whose nomination for election by the Parent Company's  shareholders was
         approved by the Parent  Company's  Nominating  Committee  then  serving
         under the Incumbent Board, shall be, for purposes of this clause (iii),
         considered as though he or she was a member of the Incumbent Board, but
         excluding,   for  this  purpose,  any  such  individual  whose  initial
         assumption  of  office  occurs  as a result  of  either  an  actual  or
         threatened  election  contest (as such terms are used in Rule 14a-11 of
         Regulation 14A  promulgated  under the Exchange Act) or other actual or
         threatened solicitation of proxies or consents;

         (iv)  approval  by  the   shareholders  of  the  Parent  Company  of  a
         reorganization,  merger or  consolidation,  or the  consummation of any
         such reorganization, merger or consolidation, other than, in any case a
         reorganization,  merger or  consolidation  with respect to which all or
         substantially  all  of  the  individuals  and  entities  who  were  the
         beneficial owners, immediately prior to such reorganization,  merger or
         consolidation,   of  the  Voting   Interest   in  the  Parent   Company
         beneficially  own,  directly  or  indirectly,  immediately  after  such
         reorganization,  merger or consolidation more than eighty percent (80%)
         of the Voting  Interest of the  corporation  or other entity  resulting
         from such reorganization,  merger or consolidation in substantially the
         same proportions as their respective  ownership,  immediately  prior to
         such reorganization, merger or consolidation, of the Voting Interest in
         the Parent Company;
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         (v)  approval  by the  shareholders  of  the  Parent  Company  of (1) a
         complete  liquidation or dissolution of the Parent Company,  or (2) the
         sale or other  disposition of all or substantially all of the assets of
         the  Parent  Company,  or  the  occurrence  of  any  such  liquidation,
         dissolution,  sale or other disposition,  other than, in any case, to a
         Subsidiary,  directly  or  indirectly,  of the Parent  Company,  or any
         affiliate; and/or

         (vi) the  solicitation  of  proxies  from  shareholders  of the  Parent
         Company,  by someone  other than the current  management  of the Parent
         Company  and  without the  approval  of the Board of  Directors  of the
         Parent   Company,   seeking   shareholder   approval   of  a  plan   or
         reorganization,  merger or consolidation of the Parent Company with one
         or more corporations as a result of which the  shareholders'  interests
         in the Parent  Company are actually  exchanged  for or  converted  into
         securities not issued by the Parent Company.

         (vii) No failure on the part of the  Executive  to exercise  any rights
         upon the  occurrence of a Change in Control shall be deemed a waiver of
         or  otherwise  impair  the  rights of the  Executive  in respect to any
         subsequent events or circumstances constituting a Change in Control.


(II) Section 2(g) is hereby amended by deleting the word "Bank" in the first and
second lines and replacing it with the words "Parent Company".

2. Confirmation of Remaining Terms:  Except as expressly modified herein, all of
the terms and conditions of the Agreement,  including the first Addendum,  shall
remain in full force and effect and are hereby ratified by the parties.


Executed under seal as of the date first written above.

Attest:                                   Springfield Institution for Savings

-----------------------                   By:
                                             --------------------------------
                                          F. William Marshall, Jr.
                                          President & Chief Executive Officer

                                          Executive

-----------------------                   -------------------------------
                                          (Name)