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                                                                    Exhibit 10.9

                             EMPLOYMENT AGREEMENT
                             --------------------

     This Employment Agreement ("Agreement") is made and entered into on this
                                 ---------
30 day of November 2000 effective as of the date hereof, by and between
AMERIPATH, INC., a Delaware corporation (the "Company"), and JAMES BILLINGTON
                                              -------
(hereinafter, the "Executive").
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                                R E C I T A L S
                                - - - - - - - -

     A.   The Executive is currently employed by Pathology Consultants of
America, Inc. (d/b/a/ Inform DX) ("Pathology") as its President and Chief
                                   ---------
Operating Officer pursuant to an employment agreement dated August 1, 1997 (the
"Prior Employment Agreement").
 --------------------------

     B.   The Company owns and maintains a one hundred percent (100%) interest
in AMP Merger Corp. (the "Merger Corp.").
                          ------------

     C.   Pursuant to that certain Agreement and Plan of Merger, dated November
7, 2000, by and among the Company, Pathology and Merger Corp. (the "Merger
                                                                    ------
Agreement"), Merger Corp. shall be merged with and into Pathology (the
---------
"Merger"), and Pathology as a result shall become a wholly owned subsidiary of
 ------
the Company.

     D.   As a result and in connection with the Merger, the Company and the
Executive now wish to enter into this new Agreement, which is intended to
supercede and replace the Prior Employment Agreement in its entirety, to reflect
the Executive's new position and duties, his compensation, and other terms and
conditions of his employment as President of the Company.  As of the
Commencement Date hereof, the Prior Agreement shall terminate and no longer have
any force and effect.

     F.   This Agreement will take effect upon, and solely in the event of, the
consummation of the transactions contemplated under the Merger Agreement.

                                   AGREEMENT
                                   ---------

     NOW, THEREFORE, in consideration of the premises and mutual covenants set
forth herein, the parties agree as follows:

     1.   Employment.
          ----------

          1.1  Employment and Term.  During the Term of Employment under this
               -------------------
Agreement, the Company hereby agrees to employ the Executive and the Executive
hereby agrees to serve the Company on the terms and conditions set forth herein.

          1.2  Duties of Executive.  During the Term of Employment under this
               -------------------
Agreement, the Executive shall serve as the Senior Vice President of Operations
of the Company, shall report directly to Brian Carr, the President of the
Company, shall faithfully and
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diligently perform all services as may be assigned to him by the Board of
Directors of the Company (the "Board"), and shall exercise such power and
authority as may from time to time be delegated to him by the Board. The
Executive shall devote his full time and attention to the business and affairs
of the Company, render such services to the best of his ability, and use his
reasonable best efforts to promote the interests of the Company. The Executive
shall comply with the Company's employment policies and practices generally
applicable to its officers and employees including, without limitation, insider
trading and confidentiality policies. Notwithstanding the foregoing or any other
provision of this Agreement, it shall not be a breach or violation of this
Agreement for the Executive to (i) serve on corporate, civic or charitable
boards or committees, (ii) deliver lectures, fulfill speaking engagements or
teach at educational institutions, or (iii) manage personal investments, so long
as such activities do not interfere with or detract from the performance of the
Executive's responsibilities to the Company in accordance with this Agreement.

     2.   Term of Employment.  The term of employment under this Agreement, and
          ------------------
the employment of the Executive hereunder (the "Term of Employment"), shall
                                                ------------------
commence on the Effective Time of the Merger as defined in the Merger Agreement
(the "Commencement Date") and shall terminate upon the date on which the
      -----------------
employment of the Executive is terminated pursuant to and in accordance with
Section 5 hereof (the "Expiration Date").
                       ---------------

     3.   Compensation.
          ------------

          3.1  Base Salary.  The Executive shall receive a base salary at the
               -----------
annual rate of $200,000 (the "Base Salary") during the Term of Employment, with
                              -----------
such Base Salary payable in installments consistent with the Company's normal
payroll schedule, subject to applicable withholding and other taxes. The Base
Salary shall be reviewed, at least annually, for merit increases and may, by
action and in the discretion of the Board, be increased at any time or from time
to time.

          3.2  Bonuses.
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               a.   During the Term of Employment, for each Bonus Period (as
defined below), the Board shall establish a bonus pool from which the Executive
shall be eligible to receive an annual bonus potentially equal to thirty percent
(30%) of the Executive's Base Salary (the "Bonus Payment"), to be determined by
                                           -------------
the Board and based upon the satisfaction by the Executive and/or the Company of
the goals (the "Goals"), to be established by December 31, 2000.
                -----
Notwithstanding the foregoing, in the event that the Goals are either exceeded
or not fully achieved for a Bonus Period, the Executive may be eligible to
receive a Bonus Payment in an amount in excess of or less than thirty percent
(30%) of the Executive's Base Salary, as determined by the Board in its sole
discretion. The amount of the annual bonus payable to the Executive for a Bonus
Period shall be equal to the sum of the following Goals that have been satisfied
with respect to such Bonus Period:

                    (i)   Quantitative Goals: If the Quantitative Goals (as set
                          ------------------
forth on Exhibit A) are satisfied for the Bonus Period, the Executive shall
receive an amount equal to sixty percent (60%) of the Bonus Payment; and

                                      -2-
<PAGE>

                    (ii)  Qualitative Goals: If the Qualitative Goals (as set
                          -----------------
forth on Exhibit A) are satisfied for the Bonus Period, the Executive shall
receive an amount equal to forty percent (40%) of the Bonus Payment.

               b.   For the Bonus Period in which the Executive's employment
with the Company terminates for any reason other than by the Company for Cause
under Section 5.1 hereof, provided that the Executive has been continuously
employed with the Company for a minimum of six (6) months during such Bonus
Period, the Company shall pay the Executive a pro rata portion (based upon the
period beginning on the first day of the Bonus Period and ending on the date on
which the Executive's employment with the Company terminates) of the bonus
otherwise payable under Section 3.2a for the Bonus Period in which such
termination of employment occurs; provided, however, that (i) the Bonus Period
shall be deemed to end on the last day of the calendar quarter in which the
Executive's employment so terminates, and (ii) the business criteria used to
determine the bonus for this short Bonus Period shall be annualized and shall be
determined based upon audited financial information prepared in accordance with
generally accepted accounting principles, applied consistently with prior
periods, and reviewed and approved by the Compensation Committee of the Board.
The Incentive Compensation for this Bonus Period is sometimes hereinafter
referred to as the "Termination Year Bonus".
                    ----------------------

               c.   The Executive shall receive such additional bonuses, if any,
as the Board may in its sole and absolute discretion determine.

               d.   Any bonuses payable pursuant to this Section 3.2 are
sometimes hereinafter referred to as "Incentive Compensation." Each period for
                                      ----------------------
which Incentive Compensation is payable hereunder is sometimes hereinafter
referred to as a "Bonus Period." Unless otherwise specified by the Board, the
                  ------------
Bonus Period shall be the calendar year.

               e.   Notwithstanding the provisions in Section 3.2b, in no event
shall the Bonus Payment contemplated in this section 3.2 be less than $40,000
for the Bonus Period ended December 31, 2001.

               f.   Year 2000 Bonus Plan.  See Exhibit A.

          3.3  Special Bonus.  In the event that, in connection with his
               -------------
employment hereunder, the Executive sells his residence at 500 Grand Oaks Drive,
Brentwood, TN (the "Home") (the "Sale") for less than the Executive's cost basis
                    ----         ----
in the Home (the "Cost"), the Company shall pay to the Executive an amount (the
                  ----
"Special Bonus") equal to the calculation of:
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          (a)  Cost; less

          (b)  the contract sales price the Executive receives upon the Sale;
               plus

          (c)  the impact of any applicable income tax consequences to the
               Executive resulting from the payment of the Special Bonus.

          In no event shall the Special Bonus, prior to any consideration paid
          to offset any adverse income tax consequences resulting from the
          Special Bonus (Section

                                      -3-
<PAGE>

          3.3(c)), exceed One Hundred Thousand Dollars ($100,000). The Special
          Bonus, if any, shall be payable by the Company to the Executive in a
          lump sum within thirty (30) days from the date of the Sale.

     4.   Expense Reimbursement and Other Benefits.
          ----------------------------------------

          4.1  Reimbursement of Expenses. Upon the submission of proper
               -------------------------
substantiation by the Executive, and subject to such rules and guidelines as the
Company may from time to time adopt with respect to the reimbursement of
expenses of executive personnel, the Company shall reimburse the Executive for
all reasonable expenses actually paid or incurred by the Executive during the
Term of Employment in the course of and pursuant to the business of the Company.
The Executive shall account to the Company in writing for all expenses for which
reimbursement is sought and shall supply to the Company copies of all relevant
invoices, receipts or other evidence reasonably requested by the Company.

          4.2  Compensation/Benefit Programs.  During the Term of Employment,
               -----------------------------
the Executive shall be entitled to participate in all medical, dental,
hospitalization, accidental death and dismemberment, disability, travel and life
insurance plans, and any and all other plans as are presently and hereinafter
offered by the Company to its executive personnel, including savings, pension,
profit-sharing and deferred compensation plans, subject to the general
eligibility and participation provisions set forth in such plans.

          4.3  Working Facilities.  During the Term of Employment, the Company
               ------------------
shall furnish the Executive with an office, secretarial help and such other
facilities and services suitable to his position and adequate for the
performance of his duties hereunder.

          4.4  Stock Options.  During the Term of Employment hereunder, and
               -------------
subject to the execution of any other applicable agreements, the Executive shall
be eligible to receive options (the "Initial Stock Options") to purchase up to
                                     ---------------------
25,000 shares of common stock (the "Common Stock") of the Company, to be
                                    ------------
determined by the Chairman of the Board and CEO (the "Chairman") of the Company
                                                      --------
based upon the Executive's performance and services rendered to the Company in
calendar year 2001, and subject to the approval by both the Compensation
Committee and the Board at their regular annual review of employee performance
to be held in calendar year 2002.  If and to the extent awarded, the Initial
Stock Options shall be granted under (and therefore subject to all terms of) the
Company's stock option plan (the "Stock Option Plan") and pursuant to the terms
                                  -----------------
of a certain stock option agreement (the "Option Agreement") to be entered into
                                          ----------------
by and between the Executive and the Company.  In addition, during the Term of
Employment, the Executive shall be eligible to be granted additional options
under the Company's Stock Option Plan.  The number, if any, of additional
options and terms and conditions thereof shall be determined by the Committee
appointed pursuant to the Stock Option Plan, or by the Board of Directors of the
Company, in its discretion and pursuant to the Stock Option Plan.

          4.5  Other Benefits. The Executive shall accrue up to four (4) weeks
               --------------
of paid vacation each calendar year during the Term of Employment, to be taken
at such times as the Executive and the Company shall mutually determine and
provided that no vacation time shall

                                      -4-
<PAGE>

significantly interfere with the duties required to be rendered by the Executive
hereunder. Any accrued vacation time not taken by Executive during any calendar
year may be carried forward into any succeeding calendar year. Notwithstanding
the foregoing, in no event shall the Executive's accrued vacation time exceed
four (4) weeks at any point in time. The Executive shall receive such additional
benefits, if any, as the Board of the Company shall from time to time determine.

          4.6  Relocation Allowance. Upon submission of proper documentation to
               --------------------
the Company by the Executive, the Company shall reimburse the Executive for all
reasonable relocation expenses incurred by the Executive in an amount not to
exceed $68,000. For this purpose, relocation expenses shall include house-
hunting trips, moving and storage expenses for household items,
travel/transition of the Executive's family to Florida, all costs incurred by
the Executive on the sale of the Executive's real property and loan origination
fees on the purchase of a new residence, and all temporary housing expenses. In
addition, the Company shall reimburse the Executive on a grossed-up basis in the
event that any federal, state and local taxes are assessed upon the Executive
with respect to payments made pursuant to this Section 4.6. If the Executive
terminates his employment with the Company pursuant to Section 5.5 hereof (a)
prior to the first anniversary of the Commencement Date hereof, then the
Executive immediately shall refund to the Company the full amount of any
relocation expenses reimbursed by the Company pursuant to this Section 4.7, or
(b) on or after the first anniversary of the Commencement Date hereof but prior
to the second anniversary of the Commencement Date (the "Second Year"), then the
                                                         -----------
Executive shall refund to the Company a portion of any relocation expenses
reimbursed by the Company pursuant to this Section 4.7, determined by
multiplying the total amount of relocation expenses paid to the Executive by a
fraction the numerator of which shall be equal to the number of full calendar
months the Executive was employed by the Company during the Second Year and the
denominator of which is 12.  The Company shall be entitled to offset the refund
payable by the Executive pursuant to the prior sentence against any amounts
payable by the Company to the Executive.

     5.   Termination.
          -----------

          5.1  Termination for Cause. The Company shall at all times have the
               ---------------------
right, upon written notice to the Executive, to terminate the Term of
Employment, for Cause as defined below. For purposes of this Agreement, the term
"Cause" shall mean (i) an action or omission of the Executive which constitutes
 -----
a willful and material breach of, or willful and material failure or refusal
(other than by reason of his disability or incapacity) to perform his duties
under, this Agreement which is not cured within fifteen (15) days after receipt
by the Executive of written notice of same, (ii) fraud, embezzlement,
misappropriation of funds or breach of trust in connection with his services
hereunder, (iii) a conviction of any crime which involves dishonesty or a breach
of trust, or (iv) gross negligence in connection with the performance of the
Executive's duties hereunder, which the Board in its reasonable discretion deems
to be good and sufficient cause to terminate the Executive's employment with the
Company. Any termination for Cause shall be made by notice in writing to the
Executive, which notice shall set forth in reasonable detail all acts or
omissions upon which the Company is relying for such termination. Upon any
termination pursuant to this Section 5.1, the Company shall (i) pay to the
Executive any unpaid Base Salary through the date of termination and (ii) pay to
the Executive his accrued

                                      -5-
<PAGE>

but unpaid Incentive Compensation, if any, for any Bonus Period ending on or
before the date of the termination of Executive's employment with the Company.
Upon any termination effected and compensated pursuant to this Section 5.1, the
Company shall have no further liability hereunder (other than for (x)
reimbursement for reasonable business expenses incurred prior to the date of
termination, subject, however, to the provisions of Section 4.1, and (y) payment
of compensation for accrued and unused vacation days).

          5.2  Disability. The Company shall at all times have the right, upon
               ----------
written notice to the Executive, to terminate the Term of Employment, if the
Executive shall become entitled to benefits under the Company's long term
disability plan as then in effect, or, if the Executive shall as the result of
mental or physical incapacity, illness or disability, become unable to perform
his obligations hereunder for a period of 180 days in any 12-month period.  The
Board shall have sole discretion based upon competent medical advice to
determine whether the Executive is or continues to be disabled.  Upon any
termination pursuant to this Section 5.2, the Company shall (i) pay to the
Executive any unpaid Base Salary through the effective date of termination
specified in such notice, (ii) pay to the Executive his accrued but unpaid
Incentive Compensation, if any, for any Bonus Period ending on or before the
date of termination of the Executive's employment with the Company, and (iii)
pay to the Executive his Termination Year Bonus, if any, at the time provided in
Section 3.2b hereof.  Upon any termination effected and compensated pursuant to
this Section 5.2, the Company shall have no further liability hereunder (other
     -----------
than for (x) reimbursement for reasonable business expenses incurred prior to
the date of termination, subject, however, to the provisions of Section 4.1, and
(y) payment of compensation for accrued and unused vacation days).

          5.3  Death.  Upon the death of the Executive during the Term of
               -----
Employment, the Company shall (i) pay to the estate of the deceased Executive
any unpaid Base Salary through the Executive's date of death, (ii) pay to the
estate of the deceased Executive his accrued but unpaid Incentive Compensation,
if any, for any Bonus Period ending on or before the Executive's date of death,
and (iii) pay to the estate of the deceased Executive, the Executive's
Termination Year Bonus, if any, at the time provided in Section 3.2b hereof.
Upon any termination effected and compensated pursuant to this Section 5.3, the
                                                               -----------
Company shall have no further liability hereunder (other than for (x)
reimbursement for reasonable business expenses incurred prior to the date of
termination, subject, however, to the provisions of Section 4.1, and (y) payment
of compensation for accrued and unused vacation days).

          5.4  Termination Without Cause.  At any time the Company shall have
               -------------------------
the right to terminate the Term of Employment by written notice to the
Executive.  Upon any termination pursuant to this Section 5.4 (that is not a
termination under any of Sections 5.1, 5.2, 5.3, 5.5 or 5.6) the Company shall
(i) pay to the Executive any unpaid Base Salary through the date of termination
specified in such notice, (ii) pay to the Executive the accrued but unpaid
Incentive Compensation, if any, for any Bonus Period ending on or before the
date of the termination of the Executive's employment with the Company, (iii)
continue to pay the Executive's Base Salary for a period of twelve (12) months
following the termination of the Executive's employment with the Company, in the
manner and at such times as the Base Salary otherwise would have been payable to
the Executive, and (iv) pay to the Executive his Termination Year Bonus, if any,
at the time provided in Section 3.2b. Upon any termination

                                      -6-
<PAGE>

effected and compensated pursuant to this Section 5.4, the Company shall have no
                                          -----------
further liability hereunder (other than for (x) reimbursement for reasonable
business expenses incurred prior to the date of termination, subject, however,
to the provisions of Section 4.1, and (y) payment of compensation for accrued
and unused vacation days).

          5.5  Termination by Executive.
               ------------------------

               a.   The Executive shall at all times have the right, by
written notice not less than one hundred and eighty (180) days prior to the
termination date, to terminate his Employment Term.

               b.   Upon termination of the Term of Employment pursuant to
this Section 5.5 (that is not a termination under Section 5.6) by the Executive,
the Company shall (i) pay to the Executive any unpaid Base Salary through the
effective date of termination specified in such notice and (ii) pay to the
Executive his accrued but unpaid Incentive Compensation, if any, for any Bonus
Period ending on or before the termination of Executive's employment with the
Company. Upon any termination effected and compensated pursuant to this Section
5.5(b), the Company shall have no further liability hereunder (other than for
(x) reimbursement for reasonable business expenses incurred prior to the date of
termination, subject, however, to the provisions of Section 4.1, and (y) payment
of compensation for accrued and unused vacation days).

          5.6  Change in Control of the Company.
               --------------------------------

               a.   Unless otherwise provided in Section 5.7 hereof, in the
event that a Change in Control (as defined in paragraph (b) of this Section 5.6)
in the Company shall occur during the Term of Employment, the Company shall pay
to the Executive, within thirty (30) days of the date of the Change in Control,
a lump sum payment equal to one times the Executive's annual Base Salary.  In
addition, if a Change in Control of the Company occurs during the Term of
Employment, and prior to one year after the date of the Change in Control, the
Term of Employment is terminated by the Company without Cause, pursuant to
Section 5.4 hereof, the Company shall (1) pay to the Executive any unpaid Base
Salary through the effective date of the termination, (2) pay to the Executive
the Incentive Compensation, if any, not yet paid to the Executive for any year
prior to such termination, at such time as the Incentive Compensation otherwise
would have been payable to the Executive, (3) pay to the Executive his
Termination Year Bonus, if any, at the time provided in Section 3.2 hereof, and
(4) pay to the Executive, within 30 days of the termination of his employment
hereunder, a lump sum payment equal to one times the Executive's annual Base
Salary.  The Company shall have no further liability hereunder (other than for
(1) reimbursement for reasonable business expenses incurred prior to the date of
termination, subject, however, to the provisions of Section 4.1, and (2) payment
of compensation for accrued and unused vacation days).

               b.   For purposes of this Agreement, the term "Change in
                                                              ---------
Control" shall mean:
-------

                    (i)   Approval by the shareholders of the Company of (x) a

                                      -7-
<PAGE>

reorganization, merger, consolidation or other form of corporate transaction or
series of transactions, in each case, with respect to which persons who were the
shareholders of the Company immediately prior to such reorganization, merger or
consolidation or other transaction do not, immediately thereafter, own more than
50% of the combined voting power entitled to vote generally in the election of
directors of the reorganized, merged or consolidated company's then outstanding
voting securities, in substantially the same proportions as their ownership
immediately prior to such reorganization, merger, consolidation or other
transaction, or (y) a liquidation or dissolution of the Company or (z) the sale
of all or substantially all of the assets of the Company (unless such
reorganization, merger, consolidation or other corporate transaction,
liquidation, dissolution or sale is subsequently abandoned);

                    (ii)  Individuals who, as of the Commencement Date of this
Agreement, constitute the Board (the "Incumbent Board") cease for any reason to
                                      ---------------
constitute at least a majority of the Board, provided that any person becoming a
director subsequent to the Commencement Date of this Agreement whose election,
or nomination for election by the Company's shareholders, was approved by a vote
of at least a majority of the directors then comprising the Incumbent Board
(other than an election or nomination of an individual whose initial assumption
of office is in connection with an actual or threatened election contest
relating to the election of the Directors of the Company) shall be, for purposes
of this Agreement, considered as though such person were a member of the
Incumbent Board; or

                    (iii) the acquisition (other than by or from the Company) by
any person, entity or "group", within the meaning of Section 13(d)(3) or
14(d)(2) of the Securities Exchange Act, of beneficial ownership within the
meaning of Rule 13-d promulgated under the Securities Exchange Act of 50% or
more of either the then outstanding shares of the Company's Common Stock or the
combined voting power of the Company's then outstanding voting securities
entitled to vote generally in the election of directors [(hereinafter referred
to as the ownership of a "Controlling Interest") excluding, for this purpose,
                          --------------------
any acquisitions by (1) the Company or its Subsidiaries, (2) any person, entity
or "group" that as of the Commencement Date of this Agreement owns beneficial
ownership (within the meaning of Rule 13d-3 promulgated under the Securities
Exchange Act) of a Controlling Interest or (3) any employee benefit plan of the
Company or its Subsidiaries].

          5.7  Certain Reduction of Payments by the Company.
               --------------------------------------------

               a.   For purposes of this section, (i) A Payment shall mean any
                                                        -------
payment or distribution in the nature of compensation to or for the benefit of
the Executive, whether paid or payable pursuant to this Agreement or otherwise;
(ii) Agreement Payment shall mean a Payment paid or payable pursuant to this
     -----------------
Agreement (disregarding this Section 5.7); (iii) Net After Tax Receipt shall
                                                 ---------------------
mean the Present Value of a Payment net of all taxes imposed on the Executive
with respect thereto under Sections 1 and 4999 of the Code, determined by
applying the highest marginal rate under Section 1 of the Code which applied to
the Executive's taxable income for the immediately preceding taxable year; (iv)
"Present Value" shall mean such value determined in accordance with Section
 -------------
280G(d)(4) of the Code; and (v) "Reduced Amount" shall mean the smallest
                                 --------------
aggregate amount of Payments which (a) is less than the sum of all Payments and
(b) results in aggregate Net After Tax Receipts which are equal to or greater
than

                                      -8-
<PAGE>

the Net After Tax Receipts which would result if the aggregate Payments were any
other amount equal to or less than the sum of all Payments.

               b.   Anything in this Agreement to the contrary notwithstanding,
in the event that the Company's independent auditors or, at the Executive's
option, any other nationally or regionally recognized firm of independent
accountants selected by the Executive and approved by the Company, which
approval shall not be unreasonably withheld (the "Accounting Firm"), shall
                                                  ---------------
determine that receipt of all Payments would subject the Executive to tax under
Section 4999 of the Code, it shall determine whether some amount of Payments
would meet the definition of a "Reduced Amount."  If the Accounting Firm
                                --------------
determines that there is a Reduced Amount, the aggregate Agreement Payments
shall be reduced to such Reduced Amount;  provided, however, that if the Reduced
Amount exceeds the aggregate Agreement Payments, the aggregate Payments shall,
after the reduction of all Agreement Payments, be reduced (but not below zero)
in the amount of such excess.

               c.   If the Accounting Firm determines that aggregate Agreement
Payments or Payments, as the case may be, should be reduced to the Reduced
Amount, the Company shall promptly give the Executive notice to that effect and
a copy of the detailed calculation thereof, and the Executive may then elect, in
his sole discretion, which and how much of the Agreement Payments or Payments,
as the case may be, shall be eliminated or reduced (as long as after such
election the present value of the aggregate Payments equals the Reduced Amount),
and shall advise the Company in writing of his election within ten days of his
receipt of notice.  If no such election is made by the Executive within such
ten-day period, the Company may elect which of the Agreement Payments or
Payments, as the case may be, shall be eliminated or reduced (as long as after
such election the present value of the aggregate Payments equals the Reduced
Amount) and shall notify the Executive promptly of such election.  All
determinations made by the Accounting Firm under this Section shall be binding
upon the Company and the Executive and shall be made within 60 days of a
termination of employment of the Executive.  As promptly as practicable
following such determination, the Company shall pay to or distribute for the
benefit of the Executive such Payments as are then due to the Executive under
this Agreement and shall promptly pay to or distribute for the benefit of the
Executive in the future such Payments as become due to the Executive under this
Agreement.

               d.   While it is the intention of the Company and the Executive
to reduce the amounts payable or distributable to the Executive hereunder only
if the aggregate Net After Tax Receipts to the Executive would thereby be
increased, as a result of the uncertainty in the application of Section 4999 of
the Code at the time of the initial determination by the Accounting Firm
hereunder, it is possible that amounts will not have been paid or distributed by
the Company to or for the benefit of the Executive pursuant to this Agreement
which should not have been so paid or distributed ("Overpayment") or that
                                                    -----------
additional amounts which will have not been paid or distributed by the Company
to or for the benefit of the Executive pursuant to this Agreement could have
been so paid or distributed ("Underpayment"), in each case, consistent with the
                              ------------
calculation of the Reduced Amount hereunder.  In the event that the Accounting
Firm, based either upon the assertion of a deficiency by the Internal Revenue
Service against the Company or the Executive which the Accounting Firm believes
has a high probability of success

                                      -9-
<PAGE>

or controlling precedent or other substantial authority, determines that an
Overpayment has been made, any such Overpayment paid or distributed by the
Company to or for the benefit of the Executive shall be treated for all purposes
as a loan ab initio to the Executive which the Executive shall repay to the
          -- ------
Company together with interest at the applicable federal rate provided for in
Section 7872(f)(2) of the Code; provided, however, that no loan shall be deemed
to have been made and no amount shall be payable by the Executive to the Company
if and to the extent such deemed loan and payment would not either reduce the
amount on which the Executive is subject to tax under Section 1 and Section 4999
of the Code or generate a refund of such taxes. In the event that the Accounting
Firm, based upon controlling precedent or other substantial authority,
determines that an Underpayment has occurred, any such Underpayment shall be
promptly paid by the Company to or for the benefit of the Executive together
with interest at the applicable federal rate provided for in Section 7872(f)(2)
of the Code.

          5.8  Resignation.  Upon any termination of employment pursuant to this
               -----------
Article 5, the Executive shall be deemed to have resigned as an officer, and if
he or she was then serving as a director of the Company, as a director, and if
required by the Board, the Executive hereby agrees to immediately execute a
resignation letter to the Board.

          5.9  Survival.  The provisions of this Article 5 shall survive the
               --------
termination of this Agreement, as applicable.

     6.   Restrictive Covenants.
          ---------------------

          6.1  Non-competition. At all times while the Executive is employed by
               ---------------
the Company and for a one (1) year period immediately following the termination
of the Executive's employment with the Company for any reason, the Executive
shall not, directly or indirectly, engage in or have any interest in any sole
proprietorship, corporation, company, partnership, association, venture or
business or any other person or entity (whether as an employee, officer,
director, partner, agent, security holder, creditor, consultant or otherwise)
that directly or indirectly (or through any affiliated entity) competes with the
Company's business (for purposes of this Agreement, any business that engages in
the management or provision of anatomic pathology diagnostic services {whether
through physician practices, laboratories, hospitals, medical or surgery centers
or otherwise} shall be deemed to compete with the Company's business); provided
that such provision shall not apply to the Executive's ownership of common stock
of the Company or the acquisition by the Executive, solely as an investment, of
securities of any issuer that are registered under Section 12(b) or 12(g) of the
Securities Exchange Act of 1934, as amended, and that are listed or admitted for
trading on any United States national securities exchange or that are quoted on
the National Association of Securities Dealers Automated Quotations System, or
any similar system or automated dissemination of quotations of securities prices
in common use, so long as the Executive does not control, acquire a controlling
interest in or become a member of a group which exercises direct or indirect
control of, more than five percent (5.0%) of any class of capital stock of such
corporation.

          6.2  Confidential Information. The Executive shall not at any time
               ------------------------
divulge, communicate, use to the detriment of the Company or for the benefit of
any other person or persons, or misuse in any way, any Confidential Information
(as hereinafter defined) pertaining to

                                      -10-
<PAGE>

the business of the Company. Any Confidential Information or data now or
hereafter acquired by the Executive with respect to the business of the Company
(which shall include, but not be limited to, information concerning the
Company's financial condition, prospects, technology, customers, suppliers,
employees, employee compensation or benefits, employment practices and methods
of doing business) shall be deemed a valuable, special and unique asset of the
Company that is received by the Executive in confidence and as a fiduciary, and
Executive shall remain a fiduciary to the Company with respect to all of such
information. For purposes of this Agreement, "Confidential Information" means
                                              ------------------------
information disclosed to the Executive or known by the Executive as a
consequence of or through the unique position of his employment with the Company
(including information conceived, originated, discovered or developed by the
Executive) prior to or after the date hereof, and not generally or publicly
known, about the Company or its business. Notwithstanding the foregoing, nothing
herein shall be deemed to restrict the Executive from disclosing Confidential
Information to promote the best interests of the Company or to the extent
required by law.

          6.3  Nonsolicitation of Employees and Customers.  At all times while
               ------------------------------------------
the Executive is employed by the Company and for the two (2) year period
immediately following the termination of the Executive's employment with the
Company for any reason, the Executive shall not, directly or indirectly, for
himself or for or on behalf of any other person, firm, corporation, partnership,
association or other entity (a) employ or attempt to employ or solicit the
termination of employment of or enter into any contractual arrangement with any
employee or former employee of the Company, unless such employee or former
employee has not been employed by the Company for a period in excess of six (6)
months, and/or (b) call on or solicit any of the actual or targeted prospective
customers or clients of the Company (or of its physician practices or
laboratories) on behalf of any person or entity in connection with any business
that competes with the Company's business, nor shall the Executive make known
the names and/or addresses of such employees, customers or clients or any
information relating in any manner to the Company's trade or business
relationships with such employees, customers or clients, other than in
connection with the performance of Executive's duties under this Agreement.

          6.4  Ownership of Developments.  All copyrights, patents, trade
               -------------------------
secrets, or other intellectual property rights associated with any ideas,
concepts, techniques, inventions, processes, or works of authorship developed or
created by Executive during the course of performing work for the Company or its
clients (collectively, the "Work Product") shall belong exclusively to the
                            ------------
Company and shall, to the extent possible, be considered a work made by the
Executive for hire for the Company within the meaning of Title 17 of the United
States Code.  To the extent the Work Product may not be considered work made by
the Executive for hire for the Company, the Executive agrees to assign, and
automatically assign at the time of creation of the Work Product, without any
requirement of further consideration, any right, title, or interest the
Executive may have in such Work Product.  Upon the request of the Company, the
Executive shall take such further actions, including execution and delivery of
instruments of conveyance, as may be appropriate to give full and proper effect
to such assignment.

          6.5  Books and Records.  All books, records, and accounts relating in
               -----------------
any manner to the customers or clients of the Company, whether prepared by the
Executive or otherwise coming into the Executive's possession, shall be the
exclusive property of the Company and

                                      -11-
<PAGE>

shall be returned immediately to the Company on termination of the Executive's
employment hereunder or on the Company's request at any time.

          6.6  Definition of Company.  Solely for purposes of this Article 6,
               ---------------------
the term "Company" also shall include any existing or future subsidiaries of the
          -------
Company that are operating during the time periods described herein and any
other entities that directly or indirectly, through one or more intermediaries,
control, are controlled by or are under common control with the Company during
the periods described herein.

          6.7  Acknowledgment by Executive. The Executive acknowledges and
               ---------------------------
confirms that (a) the restrictive covenants contained in this Article 6 are
reasonably necessary to protect the legitimate business interests of the
Company, and (b) the restrictions contained in this Article 6 (including without
limitation the length of the term of the provisions of this Article 6) are not
overbroad, overlong, or unfair and are not the result of overreaching, duress or
coercion of any kind. The Executive acknowledges and confirms that his special
knowledge of the business of the Company is such as would cause the Company
serious injury or loss if he were to use such ability and knowledge to the
benefit of a competitor or were to compete with the Company in violation of the
terms of this Article 6. The Executive further acknowledges that the
restrictions contained in this Article 6 are intended to be, and shall be, for
the benefit of and shall be enforceable by, the Company's successors and
assigns.

          6.8  Reformation by Court. In the event that a court of competent
               --------------------
jurisdiction shall determine that any provision of this Article 6 is invalid or
more restrictive than permitted under the governing law of such jurisdiction,
then only as to enforcement of this Article 6 within the jurisdiction of such
court, such provision shall be interpreted and enforced as if it provided for
the maximum restriction permitted under such governing law.

          6.9  Extension of Time. If the Executive shall be in violation of any
               -----------------
provision of this Article 6, then each time limitation set forth in this Article
6 shall be extended for a period of time equal to the period of time during
which such violation or violations occur. If the Company seeks injunctive relief
from such violation in any court, then the covenants set forth in this Article 6
shall be extended for a period of time equal to the pendency of such proceeding
including all appeals by the Executive.

          6.10 Survival. The provisions of this Article 6 shall survive the
               --------
termination of this Agreement, as applicable.

     7.   Injunction. It is recognized and hereby acknowledged by the parties
          ----------
hereto that a breach by the Executive of any of the covenants contained in
Article 6 of this Agreement will cause irreparable harm and damage to the
Company, the monetary amount of which may be virtually impossible to ascertain.
As a result, the Executive recognizes and hereby acknowledges that the Company
shall be entitled to an injunction from any court of competent jurisdiction
enjoining and restraining any violation of any or all of the covenants contained
in Article 6 of this Agreement by the Executive or any of his affiliates,
associates, partners or agents, either directly or indirectly, and that such
right to injunction shall be cumulative and in addition to whatever other
remedies the Company may possess.

                                      -12-
<PAGE>

     8.   Arbitration.  Any dispute or controversy arising under or in
          ------------
connection with this Agreement shall be settled exclusively by arbitration in
Palm Beach County, Florida, in accordance with the Rules of the American
Arbitration Association then in effect (except to the extent that the procedures
outlined below differ from such rules).  Within thirty (30) days after written
notice by either party has been given that a dispute exists and that arbitration
is required, each party must select an arbitrator and those two arbitrators
shall promptly, but in no event later than thirty (30) days after their
selection, select a third arbitrator.  The parties agree to act as expeditiously
as possible to select arbitrators and conclude the dispute.  The selected
arbitrators must render their decision in writing.  The cost and expenses of the
arbitration and of enforcement of any award in any court shall be borne by the
non-prevailing party.  If advances are required, each party will advance one-
half of the estimated fees and expenses of the arbitrators.  Judgment may be
entered on the arbitrators' award in any court having jurisdiction.  Although
arbitration is contemplated to resolve disputes hereunder, either party may
proceed to court to obtain an injunction to protect its rights hereunder, the
parties agreeing that either could suffer irreparable harm by reason of any
breach of this Agreement.  Pursuit of an injunction shall not impair arbitration
on all remaining issues.

     9.   Section 162(m) Limits. Notwithstanding any other provision of this
          ---------------------
Agreement to the contrary, if and to the extent that any remuneration payable by
the Company to the Executive for any year would exceed the maximum amount of
remuneration that the Company may deduct for that year under Section 162(m)
("Section 162(m)") of the Code, payment of the portion of the remuneration for
  --------------
that year that would not be so deductible under Section 162(m) shall, in the
sole discretion of the Board, be deferred and become payable at such time or
times as the Board determines that it first would be deductible by the Company
under Section 162(m), with interest at the "short-term applicable rate" as such
term is defined in Section 1274(d) of the Code.  The limitation set forth under
this Section 9 shall not apply with respect to any amounts payable to the
Executive pursuant to Article 5 hereof.

     10.  Assignment.  Neither party shall have the right to assign or delegate
          ----------
his rights or obligations hereunder, or any portion thereof, to any other
person.

     11.  Governing Law.  This Agreement shall be governed by and construed and
          -------------
enforced in accordance with the laws of the State of Florida, without reference
to principles of conflict of laws.

     12.  Entire Agreement; Prior Agreements.  This Agreement constitutes the
          ----------------------------------
entire agreement between the parties hereto with respect to the subject matter
hereof and, upon its effectiveness, shall supersede all prior agreements,
understandings and arrangements, both oral and written, between the Executive
and the Company (or any of its affiliates) with respect to such subject matter.
In addition, this shall supercede and replace the Executive's Prior Employment
Agreement, as well as any and all other Employment and Severance Agreements, and
as of the Commencement Date hereof, the Prior Employment and Severance
Agreements shall terminate and shall no longer have any force and effect.  This
Agreement may not be modified in any way unless by a written instrument signed
by both the Company and the Executive.

                                      -13-
<PAGE>

     13.  Notices:  All notices and other communications hereunder 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:
          -------------------

          JAMES BILLINGTON
          500 Grand Oaks Drive
          Brentwood, TN 37027

          If to the Company:
          -----------------

          AmeriPath, Inc.
          7289 Garden Road, Suite 200
          Riviera Beach, FL 33404
          Attention: Chairman of the Board

     or to such other address as either party shall have furnished to the other
in writing in accordance herewith.  Notice and communications shall be effective
when actually received by the addressee.

     14.  Benefits; Binding Effect.  This Agreement shall be for the benefit of
          ------------------------
and binding upon the parties hereto and their respective heirs, personal
representatives, legal representatives, successors and, where permitted and
applicable, assigns, including, without limitation, any successor to the
Company, whether by merger, consolidation, sale of stock, sale of assets or
otherwise.

     15.  Severability.  The invalidity of any one or more of the words,
          ------------
phrases, sentences, clauses, provisions, sections or articles contained in this
Agreement shall not affect the enforceability of the remaining portions of this
Agreement or any part thereof, all of which are inserted conditionally on their
being valid in law, and, in the event that any one or more of the words,
phrases, sentences, clauses, provisions, sections or articles contained in this
Agreement shall be declared invalid, this Agreement shall be construed as if
such invalid word or words, phrase or phrases, sentence or sentences, clause or
clauses, provisions or provisions,  section or sections or article or articles
had not been inserted.  If such invalidity is caused by length of time or size
of area, or both, the otherwise invalid provision will be considered to be
reduced to a period or area which would cure such invalidity.

     16.  Waivers.  The waiver by either party hereto of a breach or violation
          -------
of any term or provision of this Agreement shall not operate nor be construed as
a waiver of any subsequent breach or violation.

     17.  Damages.  Nothing contained herein shall be construed to prevent the
          -------
Company or the Executive from seeking and recovering from the other damages
sustained by either or both of them as a result of its or his breach of any term
or provision of this Agreement.  In the event that

                                      -14-
<PAGE>

either party hereto brings suit for the collection of any damages resulting
from, or the injunction of any action constituting, a breach of any of the terms
or provisions of this Agreement, then the party found to be at fault shall pay
all reasonable court costs and attorneys' fees of the other.

     18.  Section Headings.  The article, section and paragraph headings
          ----------------
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation of this Agreement.

     19.  No Third Party Beneficiary.  Nothing expressed or implied in this
          --------------------------
Agreement is intended, or shall be construed, to confer upon or give any person
other than the Company, the parties hereto and their respective heirs, personal
representatives, legal representatives, successors and permitted assigns, any
rights or remedies under or by reason of this Agreement.

     20.  Withholding Taxes. The Company may withhold from any amounts payable
          -----------------
under this Agreement such Federal, state or local taxes as shall be required to
be withheld pursuant to any applicable law or regulation.

     21.  Counterparts.  This Agreement may be executed in one or more
          -------------
counterparts, each of which shall be deemed to be an original but all of which
together shall constitute one and the same instrument and agreement.

     IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the
date first above written.

                                             COMPANY:


                                             AMERIPATH, INC., a Delaware
                                             corporation


                                             By:________________________________
                                             Name: James C, New
                                             Title: Chairman and Chief Executive
                                             Officer

                                             EXECUTIVE:


                                             ___________________________________
                                             JAMES BILLINGTON

                                      -15-
<PAGE>

                                   EXHIBIT A



2000 Bonus Targets


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                   Percentage                                                   Jim Billington
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
------------------------------------------------------------------------------------------------------------------------------------
     2000 100% Base Total Opportunity                       65,000
------------------------------------------------------------------------------------------------------------------------------------
            2000 discretionary                              $43,000
                   base
------------------------------------------------------------------------------------------------------------------------------------
       2000 non-discretionary portion                       $23,000
------------------------------------------------------------------------------------------------------------------------------------
           40% of discretionary base                        Annual pre-corporate EBITDA of $5.883 million
   Sliding scale below 100%; at 69% no bonus                on existing regions (an increase of 22.7%
            100% goal = 100% base                           over 1999)
110% goal = 120% base
120% goal = 140% base
130% goal = 160% base
140% goal = 180% base
150% goal = 200% base
------------------------------------------------------------------------------------------------------------------------------------
      % as indicated on discretionary base                  Implementation of additional 2000 compliance
                                                            programs and procedures
                                                                                  5%
------------------------------------------------------------------------------------------------------------------------------------
      % as indicated on discretionary base                  Achievement of attached specific 2000
                                                            objectives
                                                                                 15%

------------------------------------------------------------------------------------------------------------------------------------
           %10 on discretionary base                        Integrate PathSource with minimum of $1.0
    (only applicable if PathSource closes)                  million corporate/operating synergies

------------------------------------------------------------------------------------------------------------------------------------
% as indicated; sliding scale down, no bonus                Add new groups with minimum total annualized
           earned at 69% or below.                          EBITDA (precorporate) of $5.5 million
                                                                                 10%
------------------------------------------------------------------------------------------------------------------------------------
Subjective amount                                                                20%
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      -16-