Exhibit 4 to Form 8-K submitted on December 19, 1997


                   The ServiceMaster Company

           CERTIFICATE OF DESIGNATION, PREFERENCES AND
    RIGHTS OF JUNIOR PARTICIPATING PREFERRED STOCK, SERIES A


         Pursuant to Section 151 of the Corporation Law
                            of the State of Delaware


          I, Vernon T. Squires, the Senior Vice President and General Counsel of
The  ServiceMaster  Company,  a  corporation  organized  and existing  under the
General  Corporation  Law of the  State  of  Delaware,  in  accordance  with the
provisions of Section 151 thereof, DO HEREBY CERTIFY:

          That pursuant to the authority  conferred  upon the Board of Directors
by the Certificate of Incorporation  of the Corporation,  the Board of Directors
on December  12, 1997,  adopted the  following  resolution  creating a series of
1,000,000 shares of Preferred Stock designated as Series A Junior  Participating
Preferred Stock:

          RESOLVED,  that  pursuant  to the  authority  vested  in the  Board of
Directors by the Certificate of  Incorporation of the Corporation and out of the
Preferred Stock authorized therein, the Board hereby authorizes that a series of
Preferred  Stock of the  Corporation  be, and it hereby is, created and that the
designation and amount thereof and the voting powers,  preferences and relative,
participating,  optional and other special  rights of the shares of such series,
and the qualifications, limitations or restrictions thereof are as follows:

     Section 1.  Designation  and  Amount.  The shares of such  series  shall be
designated as "Series A Junior  Participating  Preferred  Stock," par value $.01
per share (the "Series A Preferred Stock") and the number of shares constituting
such  series  shall be  1,000,000.  Such  number of shares may be  increased  or
decreased by  resolution  of the Board of  Directors;  provided that no decrease
shall  reduce the number of shares of Series A Preferred  Stock to a number less
than the number of shares then  outstanding  plus the number of shares  reserved
for issuance  upon the exercise of  outstanding  options,  rights or warrants or
upon the  conversion of any  outstanding  securities  issued by the  Corporation
convertible into Series A Preferred Stock.

                                      


     Section 2.  Dividends and Distributions.

          (A)  Subject to the prior and  superior  rights of the  holders of any
     shares of any series of Preferred  Stock  ranking prior and superior to the
     shares of Series A Preferred  Stock with respect to dividends,  the holders
     of shares of Series A  Preferred  Stock,  in  preference  to the holders of
     Common Stock and of any other junior  stock,  shall be entitled to receive,
     when,  as and if declared by the Board of  Directors  out of funds  legally
     available  for the  purpose,  quarterly  dividends  payable  in cash on the
     fifteenth  day of March,  June,  September  and December in each year (each
     such date, a "Quarterly  Dividend  Payment Date"),  commencing on the first
     Quarterly  Dividend  Payment  Date after the first  issuance  of a share or
     fraction  of a share of Series A  Preferred  Stock,  in an amount per share
     (rounded to the nearest cent) equal to the greater of (a) $25.00 or (b) the
     Adjustment  Number (as defined  below) times the aggregate per share amount
     of all cash  dividends,  and the Adjustment  Number times the aggregate per
     share  amount  (payable  in  kind)  of  all  non-cash  dividends  or  other
     distributions  other than a dividend payable in shares of Common Stock or a
     subdivision of the outstanding shares of Common Stock (by  reclassification
     or otherwise), declared on the Common Stock since the immediately preceding
     Quarterly  Dividend  Payment Date or, with  respect to the first  Quarterly
     Dividend Payment Date, since the first issuance of any share or fraction of
     a share  of  Series  A  Preferred  Stock.  The  "Adjustment  Number"  shall
     initially  be 1000.  In the event the  Corporation  shall at any time after
     December 31, 1997 (i) declare or pay any  dividend on Common Stock  payable
     in shares of Common Stock, (ii) subdivide the outstanding Common Stock into
     a greater  number of shares or (iii) combine the  outstanding  Common Stock
     into a smaller  number  of  shares,  then in each such case the  Adjustment
     Number in effect  immediately  prior to such  event  shall be  adjusted  by
     multiplying such Adjustment  Number by a fraction the numerator of which is
     the number of shares of Common  Stock  outstanding  immediately  after such
     event and the  denominator of which is the number of shares of Common Stock
     that were outstanding immediately prior to such event.

          (B) The  Corporation  shall declare a dividend or  distribution on the
     Series A  Preferred  Stock as  provided in  paragraph  (A) of this  Section
     immediately  after it  declares a dividend  or  distribution  on the Common
     Stock (other than a dividend  payable in shares of Common Stock);  provided
     that, in the event no dividend or distribution  shall have been declared on
     the Common Stock during the period between any Quarterly  Dividend  Payment
     Date and the next subsequent Quarterly Dividend Payment Date, a dividend of
     $25.00 per share on the Series A  Preferred  Stock  shall  nevertheless  be
     payable on such subsequent Quarterly Dividend Payment Date. The Board shall
     have the right to authorize payment of each dividend declared on the Series
     A  Preferred   Stock  by  reason  of  the  declaration  of  a  dividend  or
     distribution  on the  Common  Stock at the  same  time as the  dividend  or
     distribution on the Common Stock shall occur, and if the Board does so, the
     amount of the dividend or  distribution  otherwise  payable on the Series A
     Preferred Stock on the next following Quarterly Dividend Payment Date shall
     be reduced by the amount of the  dividends  paid on the Series A  Preferred
     Stock  pursuant  to the  authority  granted in 

                                      -2-


     this  sentence  from but not
     including the Quarterly  Dividend Payment Date  immediately  preceding such
     Quarter  Dividend  Payment Date and end on such Quarterly  Dividend Payment
     Date.

          (C) Dividends  shall begin to accrue and be cumulative on  outstanding
     shares of Series A Preferred Stock from the Quarterly Dividend Payment Date
     next  preceding  the date of issue of such  shares  of  Series A  Preferred
     Stock,  unless the date of issue of such shares is prior to the record date
     for the first Quarterly  Dividend  Payment Date, in which case dividends on
     such shares shall begin to accrue from the date of issue of such shares, or
     unless the date of issue is a Quarterly  Dividend Payment Date or is a date
     after the record date for the  determination of holders of shares of Series
     A Preferred Stock entitled to receive a quarterly  dividend and before such
     Quarterly  Dividend  Payment Date, in either of which events such dividends
     shall  begin to  accrue  and be  cumulative  from such  Quarterly  Dividend
     Payment  Date,  provided  that if at the time of issuance of such shares of
     Series A  Preferred  Stock  dividends  shall be in arrears on the shares of
     Series A Preferred Stock then outstanding,  dividends shall begin to accrue
     on such  shares of Series A  Preferred  Stock  from the date from which the
     dividends  then in  arrears  shall  have  begun to accrue and the amount of
     accrued  dividend  owed on each newly issued share shall be the same as the
     accrued dividend per share then in arrears on the previously  issued shares
     then  outstanding.  Accrued but unpaid  dividends  shall not bear interest.
     Dividends paid on the shares of Series A Preferred  Stock in an amount less
     than the total amount of such  dividends at the time accrued and payable on
     such shares shall be allocated pro rata on a share-by-share basis among all
     such  shares  at the time  outstanding.  The Board of  Directors  may fix a
     record  date  for the  determination  of  holders  of  shares  of  Series A
     Preferred  Stock entitled to receive  payment of a dividend or distribution
     declared thereon,  which record date shall be no more than 30 days prior to
     the date fixed for the payment thereof.

     Section 3.  Voting Rights.  The holders of shares of Series
A Preferred Stock shall have the following voting rights:

          (A) Each share of Series A Preferred  Stock  shall  entitle the holder
     thereof to a number of votes equal to the  Adjustment  Number (as  adjusted
     from time to time pursuant to Section 2(A) hereof) on all matters submitted
     to a vote of the stockholders of the Corporation.

          (B)  Except as  otherwise  provided  herein or  required  by law,  the
     holders of shares of Series A Preferred  Stock and the holders of shares of
     Common Stock shall vote together as one class on all matters submitted to a
     vote of stockholders of the Corporation.

          (C) (i) If at any time dividends on any Series A Preferred Stock shall
     be in arrears in an amount equal to six quarterly  dividends  thereon,  the
     occurrence  of such  

                                      -3-


     contingency  shall mark the  beginning  of a period (a
     "default  period")  that shall  extend until such time when all accrued and
     unpaid  dividends for all previous  quarterly  dividend periods and for the
     current  quarterly  period on all shares of Series A  Preferred  Stock then
     outstanding  shall have been  declared  and paid or set apart for  payment.
     During each default period,  (1) the number of Directors shall be increased
     by two,  effective  as of the time of election of such  Directors as herein
     provided,  and (2) the holders of Series A Preferred  Stock and the holders
     of other  Preferred  Stock upon which these or like voting rights have been
     conferred and are exercisable (the "Voting Preferred Stock") with dividends
     in arrears equal to six  quarterly  dividends  thereon,  voting as a class,
     irrespective of series, shall have the right to elect such four Directors.

            (ii) During any default period,  such voting right of the holders of
     Series A Preferred  Stock may be exercised  initially at a special  meeting
     called pursuant to subparagraph (iii) of this Section 3(C) or at any annual
     meeting of stockholders, and thereafter at annual meetings of stockholders,
     provided  that such voting right shall not be exercised  unless the holders
     of at least  one-third  in number of the shares of Voting  Preferred  Stock
     outstanding shall be present in person or by proxy. The absence of a quorum
     of the holders of Common Stock shall not affect the exercise by the holders
     of Voting Preferred Stock of such voting right.

          (iii) Unless the holders of Voting  Preferred  Stock shall,  during an
     existing  default period,  have  previously  exercised their right to elect
     Directors,  the  Board  of  Directors  may  order,  or any  stockholder  or
     stockholders  owning in the aggregate not less than 10% of the total number
     of shares of Voting  Preferred Stock  outstanding,  irrespective of series,
     may  request,  the  calling of a special  meeting of the  holders of Voting
     Preferred Stock, which meeting shall thereupon be called by the Chairman of
     the Board, the Chief Executive Officer, the President,  the Chief Financial
     Officer,  a Vice President or the Secretary of the  Corporation.  Notice of
     such meeting and of any annual meeting at which holders of Voting Preferred
     Stock are entitled to vote  pursuant to this  paragraph  (C)(iii)  shall be
     given to each holder of record of Voting  Preferred Stock by mailing a copy
     of such notice to him at his last  address as the same appears on the books
     of the  Corporation.  Such  meeting  shall be called for a time not earlier
     than 10 days and not later than 60 days after such order or request  or, in
     default of the calling of such  meeting  within 60 days after such order or
     request, such meeting may be called on similar notice by any stockholder or
     stockholders  owning in the aggregate not less than 10% of the total number
     of  shares of  Voting  Preferred  Stock  outstanding.  Notwithstanding  the
     provisions of this  paragraph  (C)(iii),  no such special  meeting shall be
     called  during the period  within 60 days  immediately  preceding  the date
     fixed for the next annual meeting of the stockholders.

           (iv) In any default  period,  after the  holders of Voting  Preferred
     Stock  shall have  exercised  their  right to elect  Directors  voting as a
     class,  (x) the  Directors  so elected by the  holders of Voting  Preferred
     Stock shall continue in office until the earlier of the time at 

                                      -4-


     which their
     successors shall have been elected by such holders or the expiration of the
     default period, and (y) any vacancy in the Board of Directors may be filled
     by vote of the remaining Director theretofore elected by the holders of the
     class or classes of stock which  elected the  Director  whose  office shall
     have become vacant.  References in this paragraph (C) to Directors  elected
     by the  holders of a  particular  class or classes of stock  shall  include
     Directors elected by such Directors to fill vacancies as provided in clause
     (y) of the foregoing sentence.

            (v)  Immediately  upon the expiration of a default  period,  (x) the
     right  of the  holders  of  Voting  Preferred  Stock  as a class  to  elect
     Directors shall cease, (y) the term of any Directors elected by the holders
     of Voting  Preferred Stock as a class shall terminate and (z) the number of
     Directors shall be such number as may be provided for in the Certificate of
     Incorporation  or Bylaws  irrespective of any increase made pursuant to the
     provisions of paragraph  (C) of this Section 3 (such number being  subject,
     however,  to change  thereafter  in any  manner  provided  by law or in the
     Certificate of Incorporation or Bylaws).

          (D)  Except  as set  forth  herein or as  otherwise  required  by law,
     holders of Series A Preferred Stock shall have no special voting rights and
     their consent shall not be required (except to the extent they are entitled
     to vote with  holders of Common  Stock as set forth  herein) for taking any
     corporate action.

     Section 4.  Certain Restrictions.

          (A) Whenever  quarterly  dividends or other dividends or distributions
     payable on the Series A  Preferred  Stock as  provided  in Section 2 are in
     arrears,  thereafter  and  until  all  accrued  and  unpaid  dividends  and
     distributions,  whether or not  declared,  on shares of Series A  Preferred
     Stock outstanding shall have been paid in full, the Corporation shall not:

               (i) declare or pay dividends on, or make any other  distributions
          on, any shares of stock ranking junior (either as to dividends or upon
          liquidation,  dissolution  or winding  up) to the  Series A  Preferred
          Stock;

               (ii) declare or pay dividends on or make any other  distributions
          on any shares of stock ranking on a parity  (either as to dividends or
          upon  liquidation,  dissolution  or  winding  up)  with  the  Series A
          Preferred  Stock,  except  dividends  paid  ratably  on the  Series  A
          Preferred  Stock  and all such  parity  stock on which  dividends  are
          payable or in arrears in  proportion to the total amounts to which the
          holders of all such shares are then entitled;

                (iii) redeem or purchase or otherwise  acquire for consideration
          shares of any stock  ranking  junior  (either as to  dividends or upon
          liquidation,  dissolution  or 

                                      -5-


          winding  up) to the  Series A  Preferred
          Stock, provided that the Corporation may at any time redeem,  purchase
          or otherwise  acquire  shares of any such junior stock in exchange for
          shares of any stock of the  Corporation  ranking  junior (either as to
          dividends  or upon  dissolution,  liquidation  or  winding  up) to the
          Series A Preferred Stock; or

               (iv) redeem,  purchase or otherwise acquire for consideration any
          shares of Series A Preferred  Stock, or any shares of stock ranking on
          a parity with the Series A Preferred Stock,  except in accordance with
          a purchase offer made in writing or by  publication  (as determined by
          the Board of  Directors) to all holders of such shares upon such terms
          as the  Board of  Directors,  after  consideration  of the  respective
          annual dividend rates and other relative rights and preferences of the
          respective  series and  classes,  shall  determine  in good faith will
          result in fair and equitable  treatment among the respective series or
          classes.

          (B) The Corporation shall not permit any subsidiary of the Corporation
     to purchase or otherwise  acquire for  consideration any shares of stock of
     the Corporation  unless the Corporation  could, under paragraph (A) of this
     Section 4,  purchase or  otherwise  acquire such shares at such time and in
     such manner.

     Section  5.  Reacquired  Shares.  Any  shares of Series A  Preferred  Stock
purchased  or otherwise  acquired by the  Corporation  in any manner  whatsoever
shall be retired and canceled promptly after the acquisition  thereof.  All such
shares shall upon their  cancellation  become  authorized but unissued shares of
Preferred  Stock and may be reissued as part of a new series of Preferred  Stock
to be created by resolution or resolutions of the Board of Directors, subject to
the conditions and restrictions on issuance set forth herein.

     Section 6.  Liquidation,  Dissolution or Winding Up. Upon any  liquidation,
dissolution or winding up of the Corporation,  no distribution shall be made (A)
to the holders of shares of stock ranking junior (either as to dividends or upon
liquidation,  dissolution or winding up) to the Series A Preferred Stock unless,
prior  thereto,  the  holders of shares of Series A  Preferred  Stock shall have
received the greater of (i) $100 per share,  plus an amount equal to accrued and
unpaid dividends and distributions thereon, whether or not declared, to the date
of such payment, and (ii) an aggregate amount per share, equal to the Adjustment
Number (as adjusted from time to time pursuant to Section 2(A) hereof) times the
aggregate  amount to be distributed per share to holders of Common Stock, or (B)
to the  holders of stock  ranking on a parity  (either as to  dividends  or upon
liquidation,  dissolution  or  winding  up) with the Series A  Preferred  Stock,
except  distributions made ratably on the Series A Preferred Stock and all other
such parity stock in proportion to the total amounts to which the holders of all
such shares are entitled upon such liquidation, dissolution or winding up.

     Section 7. Consolidation,  Merger, etc. In case the Corporation shall enter
into any  consolidation,  merger,  combination or other transaction in which the
shares  of  Common  Stock 

                                      -6-


are  exchanged  for or  changed  into  other  stock or
securities,  cash and/or any other property, then in any such case the shares of
Series A Preferred  Stock then  outstanding  shall at the same time be similarly
exchanged or changed in an amount per share equal to the  Adjustment  Number (as
adjusted  from time to time pursuant to Section 2(A) hereof) times the aggregate
amount of stock,  securities,  cash and/or any other property (payable in kind),
as the case may be,  into  which or for  which  each  share of  Common  Stock is
changed or exchanged.

     Section 8.  No Redemption.  The shares of Series A Preferred
Stock shall not be redeemable.

     Section 9. Rank. The Series A Preferred  Stock shall rank,  with respect to
the payment of dividends and the distribution of assets, junior to all series of
any other class of the Corporation's Preferred Stock issued at any time.

     Section  10.  Fractional  Shares.  The Series A  Preferred  Stock  shall be
issuable  in  fractional  shares such that the  smallest  fraction of a share to
which a shareholder  shall be entitled at any particular  time shall be equal to
the reciprocal of the Adjustment Number in effect at that particular time.

     Section 11. Amendment.  The Certificate of Incorporation of the Corporation
shall not be amended in any manner  which would  materially  alter or change the
powers,  preferences or special rights of the Series A Preferred  Stock so as to
affect them adversely  without the affirmative vote of the holders of two-thirds
of the  outstanding  shares of Series A Preferred  Stock,  voting  together as a
single class.

          IN WITNESS WHEREOF, this Certificate of Designations has been executed
on behalf of the  Corporation by its Senior Vice  President and General  Counsel
and attested by its Assistant Secretary this 18th day of December, 1997.




                         By  /s/   Vernon T. Squires
                           Sr.  Vice  President  and  General Counsel


 Attest:


- -----------------------------

          Secretary

                                      -7-