EMPLOYMENT AGREEMENT

          THIS  AGREEMENT  by  and  between   Safety-Kleen   Corp.,  a  Delaware
corporation (the "Company"), and Larry W. Singleton (the "Executive"),  is dated
as of the 17th day of July, 2000.

                               W I T N E S S E T H

          WHEREAS,  the  Company  wishes to provide  for the  employment  by the
Company of the Executive,  and the Executive wishes to serve the Company, in the
capacities and on the terms and conditions set forth in this Agreement;

          NOW, THEREFORE, it is hereby agreed as follows:

          1. TERM.  The term of this Agreement (the "Term") shall commence as of
July  17,  2000  (the  "Commencement  Date")  and  shall  end  upon  the  second
anniversary of the Commencement Date.

          2. POSITION AND DUTIES. (a) During the Term, the Executive shall serve
as the Senior Vice  President  and Chief  Financial  Officer of the Company with
such duties and  responsibilities as are customarily  assigned to such position,
and such other duties and  responsibilities  not  inconsistent  therewith as may
from time to time be assigned to him by the Chief Executive  Officer (the "CEO")
or the Board.

          (1) During the Term,  and  excluding  any periods of vacation and sick
leave to which the Executive is entitled,  and as reasonably  necessary to allow
for  transition  from  existing  engagements,  and  except  as may be  otherwise
authorized by the Board,  the Executive  shall devote  substantially  all of his
attention  and time during  business  hours to the  business  and affairs of the
Company and shall carry out such  responsibilities  faithfully and  efficiently.
The Executive may serve on corporate,  industry,  civic or charitable boards and
committees,  so long as the Executive  secures the prior written  consent of the
Board to engage  in such  activities,  which  consent  will not be  unreasonably
withheld,  and  EXHIBIT  A  attached  hereto  contains  a list of  such  current
activities which are all hereby approved.


<PAGE>



          (2) Other than for periods  spent  traveling  in  connection  with the
performance of the Executive's duties hereunder, the Executive shall be based in
Columbia,  South  Carolina.  During the Term,  the  Company  shall  provide  the
Executive  with an apartment in the Columbia  area and shall pay the  reasonable
out of pocket  transportation  costs associated with the Executive's stay in the
Columbia area, including  Executive's  reasonable commuting expenses to and from
Orlando,  Florida. The aggregate cost to the Company shall not exceed $3,500 per
month for living expenses plus $25,000 per year for taxation on  transportation.
In addition,  the Company  shall  reimburse  the  Executive  for his  reasonable
relocation  expenses  incurred in moving to  Columbia,  South  Carolina,  not to
exceed  $100,000.  The  Executive  shall  provide  the Company  with  acceptable
documentation  substantiating  such living  expenses,  tax costs and  relocation
expenses.

          3. COMPENSATION. (a) BASE SALARY. During the Term, the Executive shall
receive an annual base salary  ("Annual  Base  Salary") of $600,000.  The Annual
Base Salary shall be payable in accordance  with the Company's  regular  payroll
practice for its senior executives, as in effect from time to time.

          (1) PLAN OF REORGANIZATION/SALE BONUS. If the Executive is employed by
the Company on the date a plan of reorganization  for the Company is consummated
in connection  with any Chapter 11  bankruptcy  or similar  proceeding or on the
date of the sale of substantially  all of the assets of the Company (the "Sale")
then,  within fifteen (15) days of such  consummation or sale, the Company shall
pay to the  Executive  a bonus of  $500,000  (the  "Plan of  Reorganization/Sale
Bonus"),  in  recognition  of  the  Executive's  efforts  in  facilitating  such
reorganization or sale.

          (2)  DISCRETIONARY  BONUS.  The Executive shall be eligible to receive
such  bonuses  as may be  determined  from time to time by the Board in its sole
discretion  payable from any bonus pool  established  under  Company's  employee
retention program as approved by the Bankruptcy Court.

          (3) OTHER  BENEFITS.  During  the  Term:  (1) the  Executive  shall be
entitled to participate in all applicable fringe benefit and perquisite programs
and savings and  retirement  plans  (other than any  non-qualified  supplemental
retirement or "top-hat" plans), practices,  policies and programs of the Company
to the same  extent that such  benefits  were  provided  to the Chief  Financial
Officer  of the  Company  prior  to  March 6,  2000 or are  otherwise  generally
provided to other senior  executives of the Company and (2) the Executive and/or
the Executive's eligible  dependents,  as the case may be, shall be eligible for
participation  in, and shall receive all benefits under,


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<PAGE>

all applicable welfare benefit plans, practices,  policies and programs provided
by the Company to the same extent, and subject to the same terms, conditions, as
other senior executives of the Company.

          (4)  INDEMNIFICATION.  The Company  agrees to  indemnify  and hold the
Executive  harmless,  to the fullest extent permitted under applicable law, for,
from and against any and all losses,  claims,  damages,  liabilities  or actions
(including  security holder actions,  in respect  thereof) related to or arising
out of the  Executive's  employment with or service to the Company or any of its
affiliates,  except  for  actions  finally  determined  by a court of  competent
jurisdiction  to have  been  taken  in bad  faith or to have  constituted  gross
negligence or willful misconduct. At all times during the Term, the Company will
maintain director and officer liability insurance coverage and policies covering
the Executive which are no less favorable than those currently maintained by the
Company and  applicable  to the  Executive.  Following  any  termination  of the
Executive's  employment or service with the Company, the Company shall cause any
director and officer liability  insurance  policies  applicable to the Executive
prior to such  termination  to remain in  effect  on a  claims-made  basis for a
period of three years following such  termination or, if longer,  any applicable
statute of  limitations.  Nothing in this Agreement is intended to infringe such
rights  the  Executive  may  have  under  the  Company's  bylaws,   articles  of
incorporation or otherwise.

          4. TERMINATION OF EMPLOYMENT. (a) DEATH OR DISABILITY. The Executive's
employment shall terminate  automatically  upon the Executive's death during the
Term.  The Company  shall be entitled to terminate  the  Executive's  employment
because of the Executive's Disability during the Employment Period. "Disability"
means that (i) the Executive has been unable, for six (6) consecutive months, to
perform the Executive's duties under this Agreement,  as a result of physical or
mental  illness or injury,  and (ii) a physician  selected by the Company or its
insurer has determined  that the Executive is so disabled.  A termination of the
Executive's  employment by the Company for Disability  shall be  communicated to
the  Executive by written  notice,  and shall be effective on the 30th day after
receipt of such notice by the Executive (the  "Disability  Confirmation  Date"),
unless the Executive returns to full-time  performance of the Executive's duties
before the Disability Confirmation Date.

          (1)  TERMINATION  BY THE  COMPANY.  The Company  may, by  delivering a
written   termination  notice  to  the  Executive,   terminate  the  Executive's
employment at any time during the Term for Cause or without Cause. "Cause" means
(i) the willful and continued failure by the Executive  substantially to perform

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<PAGE>

his duties with the  Company  (other than any such  failure  resulting  from the
Executive's death or his incapacity due to physical or mental illness or injury)
after a written demand for substantial performance is delivered to the Executive
by the CEO,  which demand  specifically  identifies  the manner in which the CEO
believes that the Executive has not  substantially  performed his duties and the
Executive  has failed to correct  such  failure to  substantially  perform  such
duties within thirty (30) days after such written  demand is delivered;  or (ii)
the willful  engaging  by the  Executive  in conduct  that is  demonstrably  and
materially  injurious to the Company,  monetarily  or  otherwise,  and no act or
failure to act on the Executive's part shall be deemed "willful" unless done, or
omitted to be done, by the  Executive  not in good faith and without  reasonable
belief that such action or omission was in the best interests of the Company.

          (2)  TERMINATION  BY  EXECUTIVE.  The  Executive  may, by delivering a
written termination notice to the Company,  terminate his employment at any time
during the Term with Good Reason or without Good Reason. "Good Reason" means the
Company  has  failed to cure any  material  breach or  default  by it under this
Agreement  within thirty (30) days after  receiving  written notice thereof from
the Executive.

          (3) TERMINATION FOLLOWING PAYMENT OF THE PLAN OF REORGANIZATION BONUS.
The Company may, by delivering a written  termination  notice to the  Executive,
terminate the Executive's  employment during the sixty (60) day period following
the  payment of the Plan of  Reorganization/Sale  Bonus.  For  purposes  of this
Agreement,  if the  Sale is not  pursuant  to the  Plan of  Reorganization,  the
Executive  shall be deemed to have been  terminated  within  the sixty  (60) day
period  following such Sale and shall have no entitlement to severance  benefits
or compensation  under this Agreement.  Any such termination shall be treated as
though it were with Cause.

          (4) DATE OF TERMINATION;  RESIGNATION. The "Date of Termination" means
the date of the Executive's death, the Disability Confirmation Date, the date on
which the termination of the Executive's  employment by the Company for Cause or
without Cause or following the payment of the Plan of Reorganization/Sale  Bonus
or by the Executive with Good Reason or without Good Reason is effective, as the
case may be. Effective as of the Date of Termination, the Executive shall resign
from all offices and positions with the Company and its affiliates.

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<PAGE>

          5.  OBLIGATIONS  OF THE COMPANY UPON  TERMINATION.  (a) OTHER THAN FOR
CAUSE,  DEATH OR  DISABILITY.  If, during the Term,  the Company  terminates the
Executive's  employment for any reason other than (i) Cause, (ii) death or (iii)
Disability, or if the Executive terminates his employment for Good Reason, or if
the  Executive's  employment is not renewed upon  expiration of the Term,  then,
except  as set  forth in  Section  5(d)  below,  the  Company  shall  pay to the
Executive,  not later than thirty (30) days  following the Date of  Termination,
$500,000.

          (1) DEATH AND DISABILITY.  If the Executive's employment is terminated
by reason of the  Executive's  death or Disability  during the Term, the Company
shall pay to the  Executive  or, in the case of the  Executive's  death,  to the
Executive's  designated  beneficiaries (or, if there is no such beneficiary,  to
the Executive's  estate or legal  representative),  in a lump sum in cash within
thirty (30) days after the Date of  Termination,  any portion of the Executive's
Annual Base Salary earned through the Date of Termination  that has not yet been
paid.

          (2) BY THE COMPANY FOR CAUSE; BY THE EXECUTIVE WITHOUT GOOD REASON. If
the  Executive's  employment is  terminated by the Company for Cause,  or if the
Executive's employment is terminated by the Executive without Good Reason during
the  Term,  the  Company  shall  pay to the  Executive  in a  lump  sum in  cash
immediately  prior  to  the  Date  of  Termination  any  earned  portion  of the
Executive's  Annual Base Salary that has not been paid, and the Executive  shall
lose any and all rights to the Plan of Reorganization/Sale Bonus.

          (3) FOLLOWING  PAYMENT OF PLAN OF  REORGANIZATION/SALE  BONUS.  If the
Executive's  employment  is  terminated  pursuant to section  4(d)  hereof,  the
Company  shall pay to the Executive in a lump sum in cash  immediately  prior to
the Date of  Termination,  any earned  portion of the  Executive's  Annual  Base
Salary that has not been paid.

          6. NON-EXCLUSIVITY OF RIGHTS.  Nothing in this Agreement shall prevent
or limit  the  Executive's  continuing  or  future  participation  in any  plan,
program,  policy or practice  provided by the Company or any of its subsidiaries
or affiliated  companies for which the Executive may be selected by the Board to
participate in, nor shall anything in this Agreement  limit or otherwise  affect
such rights as the Executive may enter into under any contract or agreement with
the Company or any of its subsidiaries or affiliated companies (which contracts,
if any, shall be subject to Board  approval).  Vested benefits and other amounts
that the  Executive is otherwise  entitled to receive under any such other plan,
policy,  practice

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<PAGE>

or program of, or any  contract  of  agreement  with,  the Company or any of its
subsidiaries or affiliated  companies on or after the Date of Termination  shall
be payable in  accordance  with the terms of each such plan,  policy,  practice,
program,  contract  or  agreement,  as the case  may be,  except  as  explicitly
modified by this Agreement.

          7. FULL  SETTLEMENT.  The  Company's  obligation  to make the payments
provided for in, and otherwise to perform its obligations  under, this Agreement
shall not be affected by any set-off, counterclaim, recoupment, defense or other
claim,  right or action  that the  Company may have  against  the  Executive  or
others. In no event shall the Executive be obligated to seek other employment or
take any  other  action  by way of  mitigation  of the  amounts  payable  to the
Executive  under any of the  provisions of this  Agreement as such amounts shall
not be reduced, regardless of whether the Executive obtains other employment.

          8. CONFIDENTIAL INFORMATION. The Executive shall keep confidential all
trade secret or  confidential  information,  knowledge  or data  relating to the
Company or any of its subsidiaries or affiliated  companies and their respective
businesses that the Executive  obtains during the Executive's  employment by the
Company  or any of its  subsidiaries  or  affiliated  companies  and that is not
public  knowledge  (other than as a result of the Executive's  violation of this
Section 8)  ("Confidential  Information").  The Executive shall not communicate,
divulge or disseminate  Confidential Information at any time during or after the
Executive's  employment with the Company,  except with the prior written consent
of the Company or as otherwise required by law or legal process.

          9. DISPUTE RESOLUTION;  ATTORNEYS' FEES. All disputes arising under or
related to the  employment of the Executive or the  provisions of this agreement
shall be  settled by  arbitration  under the rules of the  American  Arbitration
Association  then in effect,  such  arbitration  to be held in  Columbia,  South
Carolina,  as the sole and exclusive remedy of either party and judgement on any
arbitration  award may be entered in any court of  competent  jurisdiction.  The
Company  agrees to reimburse  legal fees  incurred by the  Executive in any such
dispute to the extent the Executive prevails in the dispute.

          10.  SUCCESSORS.  (a) This Agreement is personal to the Executive and,
without the prior written consent of the Company, shall not be assignable by the
Executive  otherwise than by will or the laws of descent and distribution.  This
Agreement  shall inure to the benefit of and be enforceable  by the  Executive's
legal representatives.

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<PAGE>

          (1) This  Agreement  shall inure to the benefit of and be binding upon
the Company.

          11.  MISCELLANEOUS.  (a) This  Agreement  shall be  governed  by,  and
construed in accordance  with, the laws of the State of South Carolina,  without
reference to principles of conflict of laws.  The captions of this Agreement are
not part of the  provisions  hereof  and  shall  have no force or  effect.  This
Agreement may not be amended or modified except by a written agreement  executed
by the parties hereto or their respective successors and legal representatives.

          (1) All notices and other communications under this Agreement shall be
in  writing  and  shall be  given  by hand  delivery  to the  other  party or by
registered  or  certified  mail,  return  receipt  requested,  postage  prepaid,
addressed as follows:

                              If to the Executive:

                              Larry W. Singleton
                              8907 Southern Breeze Drive
                              Orlando, Florida 32836

                              With a copy to:

                              David S. Kurtz, Esq.
                              Skadden, Arps, Slate, Meagher & Flom (Illinois)
                              333 West Wacker Drive
                              Chicago, Illinois  60606

                              If to the Company:

                              Safety-Kleen Corp.
                              1301 Gervais Street
                              Columbia, South Carolina  29201
                              Attention:  Henry H. Taylor

                              With a copy to:

                              David S. Kurtz, Esq.
                              Skadden, Arps, Slate, Meagher & Flom (Illinois)
                              333 West Wacker Drive
                              Chicago, Illinois  60606

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<PAGE>


or to such other  address as either  party  furnishes to the other in writing in
accordance  with this  paragraph (b) of Section 11.  Notices and  communications
shall be effective when actually received by the addressee.

          (2)  The  invalidity  or  unenforceability  of any  provision  of this
Agreement shall not affect the validity or enforceability of any other provision
of this  Agreement.  If any provision of this Agreement shall be held invalid or
unenforceable  in part, the remaining  portion of such provision,  together with
all other  provisions of this Agreement,  shall remain valid and enforceable and
continue in full force and effect to the fullest extent consistent with law.

          (3) Notwithstanding any other provision of this Agreement, the Company
may withhold from amounts payable under this Agreement all federal, state, local
and  foreign  taxes that are  required  to be  withheld  by  applicable  laws or
regulations.

          (4) The  Executive's  or the  Company's  failure to insist upon strict
compliance with any provisions of, or to assert, any right under, this Agreement
shall not be deemed  to be a waiver of such  provision  or right or of any other
provision of or right under this Agreement.

          (5) The rights and benefits of the Executive  under this Agreement may
not be anticipated,  assigned, alienated or subject to attachment,  garnishment,
levy,  execution or other legal or equitable  process except as required by law.
Any attempt by the Executive to anticipate,  alienate,  assign,  sell, transfer,
pledge,  encumber or charge the same shall be void. Payments hereunder shall not
be considered assets of the Executive in the event of insolvency or bankruptcy.

          (6) This  Agreement may be executed in several  counterparts,  each of
which shall be deemed an original,  and said  counterparts  shall constitute but
one and the same instrument.

          IN WITNESS  WHEREOF,  the Executive  has hereunto set the  Executive's
hand and,  pursuant to the  authorization  of its Board,  the Company has caused
this  Agreement to be executed in its name on its behalf,  all as of the day and
year first above written.


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                                          --------------------------------------
                                          Larry W. Singleton

                                          SAFETY-KLEEN CORP.


                                          By:
                                            ------------------------------------
                                            David E. Thomas, Jr.
                                            Chairman and Chief Executive Officer


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                                    EXHIBIT A

Investment  Committee  Member to Revitalizacni  Agentura,  a.s.,  Prague,  Czech
Republic.

This agency, a subsidiary of the Czech  Republic's  national bank, was formed to
assist  the  government  in  restructuring   numerous  industrial  companies  in
anticipation of entering the European Union.


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