Document:

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                                                                    EXHIBIT 10.6

                         EMPLOYMENT AGREEMENT ADDENDUM
                         -----------------------------

     THIS EMPLOYMENT AGREEMENT ADDENDUM, effective as of September 1, 2000, is
attached to, and an integral part of, that certain Employment Agreement (the
"Employment Agreement") entered into by and between Dade Behring, Inc., a
---------------------
Delaware corporation (the "Company") and James Reid-Anderson ("Executive") as of
                           -------                             ---------
the date hereof.  Capitalized terms used in this Addendum without definition
shall have the meaning given to such terms in the Employment Agreement.

                             W I T N E S S E T H:

     THAT, WHEREAS, the Company (it being acknowledged and agreed by each of the
parties hereto, that for the purposes of this Employment Agreement Addendum, the
"Company" shall be deemed to include each of the Company's predecessors and
their affiliates, including, without limitation, Behring Diagnostics Inc.) is in
the worldwide business of, among other things, manufacturing and marketing
instruments and related products and services for the in vitro diagnostics
testing market; and

     WHEREAS, pursuant to the Employment Agreement, Executive will be employed
by the Company to render services to the Company and to make contributions to
the success and growth of the Company; and

     WHEREAS, Executive desires that Dade Behring Holdings, Inc., a Delaware
corporation which owns 100% of the issued and outstanding capital stock of the
Company ("Holding") execute a certain Restricted Stock Agreement dated as of the
          -------
date hereof (the "Restricted Stock Agreement") setting forth the terms pursuant
                  --------------------------
to which Holding is to grant Executive certain restricted shares of Holding's
capital stock; and

     WHEREAS, the Company is not willing to execute the Employment Agreement and
Holding is not willing to execute the Restricted Stock Agreement unless
Executive executes this Employment Agreement Addendum contemporaneously
therewith; and

     WHEREAS, the Company and Executive mutually desire to enter into this
Employment Agreement Addendum to specify each other's rights and obligations
with respect to Conflicts of Interest, Confidentiality, Non-Competition and
Intellectual Property Rights, all as more fully provided herein below.

     NOW, THEREFORE, is consideration of the premises set forth above,
Executive's employment by the Company pursuant to the terms and conditions of
the Employment Agreement, the covenants and agreements set forth in the
Restricted Stock Agreement, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, it is hereby agreed as
follows:
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     1.   Conflicts of Interest.  Executive will exert his best efforts in the
          ---------------------
performance of his duties as an employee of the Company and will remain loyal to
the Company during the term of his employment with the Company.  Executive
represents, warrants and agrees that he is not presently engaged in, nor shall
he, during the term of his employment with the Company, enter into any
employment or agency relationship with any third party whose interests might
conflict with those of the Company.  Executive further represents, warrants and
agrees that he does not presently, nor shall he, during the term of his
employment with the Company, possess any significant interest, directly or
indirectly, including without limitation through Executive's family or through
organizations or trusts controlled by Executive, in any third party whose
interest might conflict with those of the Company.

     2.   Confidentiality.  (A) As used herein, the term "Confidential
          ---------------
Information" shall mean any and all information, including, but not limited to,
all data, compilations, programs, devices, strategies, concepts, ideas or
methods concerning or related to (i) the Company's financial condition, results
of operations, and amounts of compensation paid to officers and employees; (ii)
marketing and sales programs of the Company and the terms and conditions
(including prices) of sales and offers of sales of products and/or services by
the Company; (iii) the terms, conditions and current status of the Company's
agreements and relationships with any customers, suppliers or patients; (iv) the
identities and business preferences of the Company's actual and prospective
customers and suppliers or any employee or agent thereof with whom the Company
communicates; (v) the trade secrets and know-how, manufacturing processes and
techniques, regulatory approval strategies, computer programs, data, formulae,
and compositions, service techniques and protocols, new product designs and
other skills, ideas, and strategic plans possessed, developed, accumulated or
acquired by the Company; (vi) any communications between the Company, its
officers, directors, shareholders or employees, and any attorney retained by the
Company for any purpose, or any person retained or employed by such attorney for
the purpose of assisting such attorney in his or her representation of the
Company; and (vii) any other matter or thing, whether or not recorded on any
medium, (a) by which the Company derives actual or potential economic value from
such matter or thing being not generally known to other persons or entities who
might obtain economic value from its disclosure or use, or (b) which gives the
Company an opportunity to obtain an advantage over its competitors who do not
know or use the same.

     (B)  Executive acknowledges and agrees that the Company is engaged in the
highly competitive in vitro diagnostics testing instruments and related products
and services industry, and has expended, or will expend, significant sums of
money and has invested, or will invest, a substantial amount of time to develop
and use, and maintain the secrecy of, the Confidential Information.  The Company
has thus obtained, or will obtain, a valuable economic asset which has enabled
or will enable the Company to develop an extensive reputation and to establish
long-term business relationships with its suppliers, customer and patients.  If
such Confidential Information were disclosed to another person or entity or used
for the benefit of anyone other than the Company, the Company would suffer
irreparable harm, loss and damage.  Accordingly, Executive acknowledges and
agrees that, unless the Confidential Information becomes publicly known through
legitimate origins not involving an act or omission by Executive:

                                      -2-
<PAGE>

          (i)   the Confidential Information is, and at all times hereafter
          shall remain, the sole property of the Company;

          (ii)  Executive shall use his best efforts and the utmost diligence to
          guard and protect the Confidential Information from any unauthorized
          disclosure to any competitor, supplier or customer of the Company or
          any other person, firm, corporation or other entity;

          (iii) unless the Company gives Executive prior express written
          permission, during his employment and thereafter, Executive shall not,
          use for his own benefit, or divulge to any competitor, supplier or
          customer or any other person, firm, corporation, or other entity, the
          Confidential Information which Executive may obtain, learn about,
          develop, or be entrusted with as a result of Executive's employment by
          the Company; and

          (iv)  except in the ordinary course of the Company's business,
          Executive shall not seek or accept any Confidential Information from
          any former, present, or future employee of the Company.

     (C)  Executive also acknowledges and agrees that all documentary and
tangible Confidential Information including, without limitation, such
Confidential Information as Executive has committed to memory, is supplied or
made available by the Company to the Executive solely to assist him in
performing services for and on behalf of the Company.  Executive further agrees
that after his employment with the Company is terminated for any reason:

          (i)   Executive shall not remove from Company property, and shall
          immediately return to the Company, all documentary or tangible
          Confidential Information in his possession, custody, or control and
          not make or keep any copies, notes, abstracts, summaries, tapes or
          other record of any type of Confidential Information; and

          (ii)  Executive shall immediately return to the Company any and all
          other Company property in his possession, custody or control
          including, without limitation, any and all keys, security cards,
          passes, credit cards, and marketing literature.

     3.   Non-Competition.  (A) Executive hereby agrees that unless his
          ---------------
employment by the Company shall be terminated by reason of material breach by
the Company of its obligations to Executive under the Employment Agreement,
Executive will not, prior to the expiration of 24 months after the date he shall
cease to be employed by the Company, engage in or become directly or indirectly
interested in any proprietorship, partnership, trust or corporation (whether as
owner, partner, trustee, beneficiary, stockholder, officer, director, employee,
consultant, lessor, lessee or otherwise) which shall engage anywhere within such
geographic limits as the Company and such entity are, or would be, in actual
competition, in any business activity competitive with the business activities
of the Company, including, without limitation, in connection with research or
development, production, distribution, marketing, providing or selling of
products, processes, or services, in existence or under development, which are
substantially the same, may be substituted for, or applied

                                      -3-
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to substantially the same end use in the products, processes or services with
which Executive works during the time of his employment with the Company or
about which Executive acquires Confidential Information; provided that nothing
herein will prevent Executive from owning in the aggregate not more than 5% of
the outstanding stock of any class of a corporation which is publicly traded, so
long as Executive has no participation in the management of such corporation.

     (B)  Executive further agrees that he will not, prior to the expiration of
24 months following the date of termination of Executive's employment for any
reason, directly or indirectly, or by action in concert with others, induce or
influence, or seek to induce or influence any person who is engaged by the
Company as an employee, agent, independent contractor or otherwise, to terminate
his/her/its employment or engagement, nor shall Executive, directly or
indirectly, employ or engage, or solicit for employment or engagement, or advise
or recommend to any other person or entity that such person or entity employ or
engage or solicit for employment or engagement, any person or entity employed or
engaged by the Company.

     4.   Intellectual Property Rights.   (A) As used in this Employment
          ----------------------------
Agreement Addendum, the term "Inventions" shall mean and include all procedures,
systems, machines, methods, processes, uses, apparatuses, compositions of
matter, designs or configurations, computer programs of any kind, discovered,
conceived, reduced to practice, developed, made, or produced, or any
improvements to them, and shall not be limited to the meaning of "Invention"
under the United States patent laws.  Executive agrees to disclose promptly to
the Company any and all Inventions, whether or not patentable and whether or not
reduced to practice, conceived, developed or learned by Executive during his
employment with the Company or during a period of one hundred twenty (120) days
after the termination thereof, either alone or jointly with others, which relate
to or result from the actual or anticipated business, work, research,
investigations, products, or services of the Company, or which result to any
extent, from use of the Company's premises or property. Executive acknowledges
and agrees that the Company is the sole owner of any and all property rights in
all such Inventions, including, but not limited to, the right to use, sell,
license or otherwise transfer or exploit the Inventions, and the right to make
such changes in them and the uses thereof as the Company may from time to time
determine.  Executive agrees to disclose in writing and to assign and Executive
hereby assigns, to the Company, without further consideration, Executive's
entire right, title, and interest (throughout the United States and in all
foreign countries) free and clear of all liens and encumbrances, in and to all
such Inventions, which shall be the sole property of the Company, whether or not
patentable. The Company shall reimburse Executive for reasonable out-of-pocket
expenses, such as travel, food and lodging incurred by Executive in providing
such cooperation.  This Section 4 does not apply to any Inventions:

          (i)   for which no equipment, supplies, facilities, or Confidential
          Information of the Company were used;

          (ii)  which were developed entirely on Executive's own time; and

          (iii) which do not relate at the time of conception or reduction to
          practice to the Company's current business or its actual or
          demonstrably anticipated research or development, or which do not
          result from any work performed by Executive for the

                                      -4-
<PAGE>

          Company. Executive hereby certifies than he has no continuing
          obligations with respect to the assignment of inventions or rights to
          Inventions, nor does Executive claim any previous, unpublished
          Inventions within the scope of this Employment Agreement Addendum as
          his own, except for the Inventions, if any, which are listed on
          Exhibit A to this Employment Agreement Addendum.
          ---------

     (B)  Executive hereby acknowledges and agrees that all writings and other
works which may be copyrighted (including computer programs) which are related
to the present or planned business of the Company and are prepared by Executive
during his employment with the Company shall be, to the extent permitted by law,
deemed to be works for hire, with the copyright automatically vesting in the
Company.  To the extent that such writings and works are not works for hire,
Executive hereby waives any and all "moral rights" in such writings and works,
and agrees to assign and hereby does assign to the Company all of Executive's
right, title and interest, including copyright, in such writings and works.

     (C)  Executive further agrees to reasonably cooperate with the Company,
both during and after employment in obtaining and enforcing patent, copyrights,
trademarks, and other protections of the Company's rights in and to all such
Inventions, writings and other works. Without limiting the generality of the
foregoing, Executive shall, at any time during or after employment with the
Company, at the Company's request, execute specific assignments in favor of the
Company or its nominee of Executive's interest in any of the Inventions,
writings or other works covered by this Employment Agreement Addendum, as well
as execute all papers, render all assistance, and perform all lawful acts which
the Company considers reasonably necessary or advisable for the preparation,
filing, prosecution, issuance, procurement, maintenance or enforcement of
patents, trademarks, copyrights and other protections, and any applications for
any of the foregoing, of the United States or any foreign country for any such
Inventions, writings or other works, and for the transfer of any interest
Executive may have therein. Executive shall execute any and all papers and
documents required to vest title in the Company or its nominee in any such
Inventions, writings, other works, patents, trademarks, copyrights, applications
and interests.

     (D)  In the event that Executive is not employed by the Company at the time
Executive is requested to perform any act or execute any document under
paragraph 4(C), the Company shall pay to Executive fifty dollars ($50.00) for
the execution of each such document and two thousand five hundred dollars
($2,500.00) per day for each day or portion thereof spent at the request of the
Company in the performance of acts pursuant to paragraph 4(C), plus
reimbursement for any out-of-pocket expenses incurred by Executive at the
Company's request in such performance.

     (E)  Executive represents, warrants and agrees that Executive has disclosed
to the Company all continuing obligations which Executive has with respect to
the assignment of Inventions to any previous employers, and Executive claims no
previous unpatented Inventions as his own, except for those which have been
reduced to practice and which are shown on Exhibit A hereto.  Executive
                                           ---------
acknowledges and agrees that the Company does not seek any confidential
information which Executive may have acquired from a previous employer, and
Executive will not disclose any such information to the Company.

                                      -5-
<PAGE>

     5.   Remedies.  Executive acknowledges and agrees that the business of the
          --------
Company is highly competitive, and that violation of any of the covenants
provided for in this Employment Agreement Addendum would cause immediate,
immeasurable and irreparable harm, loss and damage to the Company not adequately
compensable by a monetary award.  Accordingly, Executive agrees, without
limiting any of the other remedies available to the Company, that any violation
of said covenants, or any of them, may be enjoined or restrained by any court of
competent jurisdiction, and that any temporary restraining order or emergency,
preliminary or final injunctions may be issued by any court of competent
jurisdiction without notice and without bond.

     6.   Miscellaneous.
          -------------

     (A)  Executive will permit the Company and its agents to use and distribute
any photographs which are taken of Executive during his employment with the
Company as often as desired by the Company for any lawful purpose.  Executive
hereby waives all rights of prior inspection or approval and releases the
Company and its agents from any and all claims or demands which Executive may
have on account of the lawful use or publication of such photographs.

     (B)  The covenants and agreements of Executive in paragraphs 2, 3, 4, and 5
shall survive the termination of Executive's employment with the Company.

     (C)  It is the desire of the parties that the provisions of this Employment
Agreement Addendum be enforced to the fullest extent permissible under the laws
and public policies in each jurisdiction in which enforcement might be sought.
Accordingly, whenever possible, each of the provisions of this Employment
Agreement Addendum shall be construed and interpreted in such a manner as to be
effective and valid under applicable law.  If any provision of this Employment
Agreement Addendum or the application of any provision of this Employment
Agreement Addendum to any party or circumstance shall be prohibited by, or
invalid under applicable law, such provision shall be ineffective only to the
extent of such prohibition without invalidating the remainder of such provision,
any other provision of this Employment Agreement Addendum, or the application of
such provision to other parties or circumstances.

     (E)  It is the specific desire of the parties that the provisions of
paragraphs 2 through 4 hereof in particular be enforced to the fullest extent
permissible under the laws and public policies in each jurisdiction in which
enforcement might be sought.  Accordingly, without in any way limiting the
general applicability of paragraph 6(C) of this Employment Agreement Addendum or
paragraph 9 of the Employment Agreement, if any portion of paragraphs 2 through
4 hereof shall ever be adjudicated as invalid or unenforceable, or if the
application thereof to any party or circumstance shall be adjudicated to be
prohibited by or invalid under such laws or public policies, such paragraph or
paragraphs shall be deemed amended to delete therefrom such portion which was so
adjudicated, such deletion to apply only with respect to the operation of such
paragraph or paragraphs in the particular jurisdiction so adjudicating and on
the parties and under the circumstances as to which so adjudicated and only to
the minimum extent so required, and the parties

                                      -6-
<PAGE>

shall be deemed to have substituted for such portion so deleted, words which
give the maximum scope permitted under applicable law to such paragraph or
paragraphs.

                             *    *    *    *    *

                                      -7-
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Employment
Agreement Addendum as of the date first written above.

                                    DADE BEHRING, INC.

                                    By:  /s/ Stephen Pagliuca

                                    Its: __________________________

                                    /s/ James Reid-Anderson
                                    -------------------------------
                                    JAMES REID-ANDERSON
<PAGE>

                                                                       Exhibit A
                                                                       ---------

                                     NONE<PAGE>

                                                                    EXHIBIT 10.7

                        RESTRICTED STOCK UNIT AGREEMENT
                        -------------------------------

          THIS RESTRICTED STOCK UNIT AGREEMENT (this "Agreement"), effective as
                                                      ---------
of September 1, 2000, by and between Dade Behring Holdings, Inc., a Delaware
corporation (the "Company"), and James Reid-Anderson ("Executive").
                  -------                              ---------

          The Company and Executive desire to enter into this Agreement pursuant
to which the Company will grant to Executive 100,000 restricted stock units (the
"Units") convertible into shares of the Company's class of capital stock
 -----
designated as Common Stock, par value $0.01 per share (the "Common Stock"), in
                                                            ------------
accordance with the terms and conditions set forth in this Agreement. All shares
of Common Stock issued to Executive (whether or not distributed to Executive)
upon conversion of the Units pursuant to this Agreement are referred to herein
as the "Executive Stock."
        ---------------

          The parties hereto agree as follows:

     1.   Grant of Units.
          --------------

     (a)  Grant of Units.  As of the date hereof, the Company will grant to
          --------------
Executive the Units, subject to the terms and conditions of this Agreement.

     (b)  Representations and Warranties.  In connection with the grant of the
          ------------------------------
Units, Executive represents and warrants to the Company that:

          (i)   The Units and Executive Stock to be acquired by Executive upon
     conversion of the Units will be acquired for Executive's own account and
     not with a view to, or intention of, distribution thereof in violation of
     the Securities Act of 1933, as amended (the "1933 Act"), or any applicable
                                                  --------
     state securities laws, and the Executive Stock will not be disposed of in
     contravention of the 1933 Act or any applicable state securities laws.

          (ii)  Executive is an executive officer of the Company or its
     Subsidiaries, is sophisticated in financial matters and is able to evaluate
     the risks and benefits of the Units and Executive Stock to be acquired by
     Executive upon conversion of the Units.  For the purposes of this
     Agreement, "Subsidiary" means any corporation (other than the Company) in
                 ----------
     an unbroken chain of corporations beginning with the Company if, at the
     time the option is granted, each of the corporations other than the last
     corporation in the chain owns stock possessing 50% or more of the total
     combined voting power of all classes of stock in one of the other
     corporations in such chain.

          (iii) Executive is able to bear the economic risk of the acquisition
     of the Executive Stock for an indefinite period of time because the
     Executive Stock has not been registered under the 1933 Act and, therefore,
     cannot be sold unless subsequently registered under the 1933 Act or an
     exemption from such registration is available.

          (iv)  Executive has had an opportunity to ask questions and receive
     answers concerning the terms and conditions of the offering of the Units
     and Executive Stock to be
<PAGE>

     acquired by Executive upon conversion of the Units and has had full access
     to such other information concerning the Company and its Subsidiaries as he
     has requested.

          (v)  This Agreement constitutes the legal, valid and binding
     obligation of Executive, enforceable in accordance with its terms, and the
     execution, delivery and performance of this Agreement by Executive does not
     and will not conflict with, violate or cause a breach of any agreement,
     contract or instrument to which Executive is a party or any judgment, order
     or decree to which Executive is subject.

          (vi) Executive further understands that the certificates for any
     Executive Stock will bear the legend set forth in Section 6 hereof or such
                                                       ---------
     other legends as the Company deems necessary or desirable in connection
     with the 1933 Act or other rules, regulations or laws.

     (c)  Acknowledgments. As an inducement to the Company to grant the Units
          ---------------
to Executive, and as a condition thereto, Executive acknowledges and agrees
that:

          (i)  Neither the grant of the Units nor the issuance of Executive
     Stock to Executive nor any provision contained herein shall entitle
     Executive to remain in the employment of the Company and its Subsidiaries
     or affect the right of the Company to terminate Executive's employment at
     any time for any reason.

          (ii) The Company shall have no duty or obligation to disclose to
     Executive, and Executive shall have no right to be advised of, any material
     information regarding the Company and its Subsidiaries at any time prior
     to, upon or in connection with the forfeiture of the Units or the potential
     repurchase of Executive Stock upon the termination of Executive's
     employment with the Company and its Subsidiaries or as otherwise provided
     hereunder.

          (ii) This Agreement has been executed and delivered, and the Units
     have been granted hereunder and the Executive Stock will be issued, if at
     all, hereunder, in connection with and as a part of the compensation and
     incentive arrangements between the Company, Dade Behring Inc. and
     Executive.

          (iv) Executive has consulted with independent legal counsel (including
     tax counsel) regarding his rights and obligations under this Agreement and
     the tax consequences to Executive of the terms and conditions of this
     Agreement.

     2.  Vesting.
         -------

     (a) Vesting Schedule. Except as otherwise provided in this Section 2, 100%
         ----------------                                       ---------
of the Units shall become vested on September 1, 2003 so long as Executive is,
and has been, continuously employed by the Company or any of its Subsidiaries
through such date (such date, the "Vesting Date").
                                   ------------

                                      -2-
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     (b) Acceleration of Vesting. Upon the consummation of an Approved Sale of
         -----------------------
the Company (as defined pursuant to Section 10 below), so long as Executive is,
                                    ----------
and has been, continuously  employed by the Company or any of its Subsidiaries
through the day immediately prior to such consummation of the Approved Sale,
100% of the Units shall become vested.

     (c) Acceleration of Vesting Upon Certain Termination Events. If Executive
         -------------------------------------------------------
is no longer employed by the Company or any of its Subsidiaries as a result of
Executive's termination without Cause, Executive's resignation for Good Reason,
Disability (each as defined in Executive's Employment Agreement dated as of the
date hereof) or death, then the Units shall become vested in accordance with the
following schedule (it being understood that if such termination occurs on any
date other than a date given below, the percentage of Units that shall have
vested as of such termination date shall equal the percentage of Units which
became vested as of the immediately preceding date given below):

                                              Cumulative
                                            Percentage of      Number of
                       Date                  Units Vested    Initial Units
                       ----                  ------------    -------------

        Prior to September 1, 2001                   0%               0
        September 1, 2001                       33-1/3%          33,333
        September 1, 2002                       66-2/3%          66,666
        September 1, 2003 and thereafter           100%         100,000

     3.  Conversion; Forfeiture; Deferral of Distribution.
         -------------------------------------------------

     (a) Conversion; Forfeiture. The Units which vest either (i) on the Vesting
         ----------------------
Date, (ii) pursuant to Section 2(b) hereof or (iii) pursuant to Section 2(c)
                       ------------                             ------------
hereof shall immediately and automatically convert into shares of Common Stock
on a one-for-one basis upon which Executive shall deliver to the Company a check
in the amount of (x) $0.01 times (y) the applicable number of Units being
converted.  Any Units which are not vested upon the Termination Date (as defined
below) after taking into account Section 2(c) hereof shall immediately and
                                 ------------
automatically expire and be forfeited.  Upon conversion of Units, the Company
will distribute to Executive a certificate representing Executive Stock.

     (b) Deferral of Distribution. At any time prior to the date which is six
         ------------------------
months prior to the Vesting Date, Executive may deliver written notice to the
Company (in the form attached as Exhibit A hereto) setting forth his election to
                                 ---------
defer the distribution of all or any portion of the Executive Stock that may
vest on the Vesting Date (if any), in which case no certificates representing
shares of Executive Stock will be delivered to Executive that are issued on the
Vesting Date until the date specified in such written notice.  Executive hereby
elects to defer the distribution of all Executive Stock that may be issuable
pursuant to Section 2(c) hereof until the six month anniversary of the event
            ------------
giving rise to the vesting and conversion of the Units pursuant to Section 2(c)
                                                                   ------------
hereof. Notwithstanding a deferral of the distribution of Executive Stock, all
Executive Stock will be distributed upon a Sale of the Company.

                                      -3-
<PAGE>

     4.   Repurchase Option.
          -----------------

     (a)  Repurchase Option. In the event that Executive is no longer employed
          -----------------
by the Company or any of its Subsidiaries for any reason (the date of such
termination being referred to herein as the "Termination Date"), the Executive
                                             ----------------
Stock (including any shares of Executive Stock with respect to which
distribution has been deferred by Executive in accordance with this Agreement),
whether held by Executive, or one or more Permitted Transferees (as defined
herein), will be subject to repurchase by the Company pursuant to the terms and
conditions set forth in this Section 4 (the "Repurchase Option").
                             ---------       -----------------

     (b)  Repurchase Price. In the event that Executive is no longer employed by
          ----------------
the Company or any of its Subsidiaries for any reason (other than termination of
Executive with Cause), the Company may elect to purchase the Executive Stock at
a price per share equal to the Fair Market Value thereof. In the event that
Executive is no longer employed by the Company or any of its Subsidiaries as a
result of termination of Executive with Cause, the Company may elect to purchase
the Executive Stock at a price per share equal to $0.01.

     (c)  Repurchase Procedures.  The Company may elect to exercise the right to
          ---------------------
purchase Executive Stock pursuant to the Repurchase Option by delivering written
notice (the "Repurchase Notice") to the holder or holders of the such Executive
             -----------------
Stock. The Repurchase Notice will set forth the number of shares of Executive
Stock to be acquired from such holder(s), the price for such shares (which will
be either (i) Fair Market Value or (ii) $0.01, as indicated in this Section 4),
                                                                   ----------
the aggregate consideration to be paid for such shares and the time and place
for the closing of the transaction.  In the event that the Company elects to
purchase less than all of such Executive Stock pursuant to the terms of this
Section 4, if any shares of such Executive Stock are held by Permitted
---------
Transferees of Executive, the Company shall purchase the shares elected to be
purchased from such holder(s) of Executive Stock, pro rata according to the
number of shares of Executive Stock held by such holder(s) at the time of
delivery of such Repurchase Notice (determined as nearly as practicable to the
nearest share). If Executive Stock of different classes is to be purchased by
the Company and Executive Stock is held by Permitted Transferees of Executive,
the number of shares of each class of Executive Stock to be purchased will be
allocated among such holders, pro rata according to the total number of shares
of Executive Stock to be purchased from such persons.

     (d)  Closing. The closing of the transactions contemplated by this Section
          -------                                                       -------
4 will take place on the date designated by the Company in the Repurchase
-
Notice, which date will not be more than 90 days after the delivery of such
notice. The Company will pay for the Executive Stock to be purchased pursuant to
the Repurchase Option by delivery of, (i) a check payable to the holder of
Executive Stock in the full amount payable hereunder for such Executive Stock
(the "Repurchase Price") or (ii) if the Repurchase Price is greater than
      ----------------
$100,000 and either (A) the payment of the Repurchase Price by the Company (or
         ---
the payment by a Subsidiary of the Company to the Company of funds for the
purpose of paying the Repurchase Price) in cash would result in (1) a breach by
the Company or any of its Subsidiaries of one or more covenants contained in the
Company's or its Subsidiaries' debt or equity financing agreements or any other
agreement or (2) a violation of the Delaware General Corporation Law or (B) the
                                                                     --
Company's board of directors determines in its good faith judgement that the
Company does not have funds available to permit payment of the

                                      -4-
<PAGE>

Repurchase Price by the Company (or the payment by a Subsidiary of the Company
to the Company of funds for the purpose of paying the Repurchase Price) in cash,
the Company may deliver a check payable to the holder of such Executive Stock in
an amount equal to the greater of $100,000 or one-third (1/3) of the Repurchase
Price, and a note or notes in the amount of the balance of the Repurchase Price
payable in three equal annual installments beginning on the first anniversary of
the closing of such purchase and bearing interest (payable quarterly) at a rate
per annum equal to 8%. Any notes issued by the Company pursuant to this Section
                                                                        -------
4(d) shall be subject to any restrictive covenants to which the Company is
----
subject at the time of such purchase. The Company will receive customary
representations and warranties from each seller regarding the sale of Executive
Stock, including but not limited to the representation that such seller has good
and marketable title to the Executive Stock to be transferred free and clear of
all liens, claims and other encumbrances.

     (e) Restrictions on Repurchase.  All repurchases of Executive Stock by the
         --------------------------
Company shall be subject to applicable restrictions contained in the Delaware
General Corporation Law and in the Company's and its Subsidiaries' debt and
equity financing agreements. If any such restrictions prohibit the repurchase of
Executive Stock hereunder which the Company is otherwise entitled to make, the
Company may make such repurchases as soon as it is permitted to do so under such
restrictions.

     5.  Restrictions on Transfer.
         ------------------------

     (a) Non-Transferability of Units.  The Units are personal to Executive and
         ----------------------------
are not transferable by Executive by means of sale, assignment, exchange, pledge
or otherwise.

     (b) Non-Transferability of Executive Stock.  Executive will not sell,
         --------------------------------------
pledge or otherwise transfer any interest in any shares of Executive Stock,
except pursuant to the provisions of Sections 4, 5(c) or 10 hereof.
                                     ----------------    --

     (c) Certain Permitted Transfers. The restrictions contained in this Section
         ---------------------------                                     -------
5 will not apply with respect to transfers of Executive Stock (i) pursuant to
-
applicable laws of descent and distribution or (ii) among Executive's Family
Group (as defined below), provided that, the restrictions contained in this
                          --------
Section 5 will continue to be applicable to the Executive Stock after any such
---------
transfer and the transferees of such Executive Stock shall agree in writing to
be bound by the provisions of this Agreement. "Family Group" means Executive's
                                               ------------
spouse and descendants (whether natural or adopted), any trust solely for the
benefit of Executive and/or Executive's spouse and/or descendants and any family
limited partnership in which Executive and/or Executive's spouse and/or
descendants and/or a trust solely for the benefit of Executive or Executive's
spouse or descendants own all of the equity interests and which such persons
will manage and control. Any transferee of Executive Stock pursuant to a
transfer in accordance with the provisions of this Section 5(c) is herein
                                                   ------------
referred to as a "Permitted Transferee." Upon the transfer of Executive Stock
                  --------------------
pursuant to this Section 5(c), Executive will deliver a written notice thereof
                 ------------
(the "Transfer Notice") to the Company. The Transfer Notice will disclose in
      ---------------
reasonable detail the identity of the Permitted Transferee(s).

     6.  Additional Restrictions on Transfer.
         -----------------------------------

     (a) The certificates representing the Executive Stock will bear the
following legend:

                                      -5-
<PAGE>

     "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), AND MAY NOT BE
     SOLD OR TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT
     UNDER THE ACT OR AN EXEMPTION FROM REGISTRATION THEREUNDER. THE SECURITIES
     REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS
     ON TRANSFER, CERTAIN REPURCHASE OPTIONS AND CERTAIN OTHER AGREEMENTS SET
     FORTH IN A RESTRICTED STOCK UNIT AGREEMENT BETWEEN THE ISSUER (THE
     "COMPANY") AND A CERTAIN EMPLOYEE OF THE COMPANY DATED AS OF SEPTEMBER 1,
     2000, A COPY OF WHICH MAY BE OBTAINED BY THE HOLDER HEREOF AT THE COMPANY'S
     PRINCIPAL PLACE OF BUSINESS WITHOUT CHARGE."

     (b) No holder of Executive Stock may sell, transfer or dispose of any
Executive Stock (except pursuant to an effective registration statement under
the 1933 Act) without first delivering to the Company an opinion of counsel
reasonably acceptable in form and substance to the Company (which counsel shall
be reasonably acceptable to the Company) that registration under the 1933 Act is
not required in connection with such transfer.

     7.  Definition of Executive Stock.  For all purposes of this Agreement,
         -----------------------------
Executive Stock will continue to be Executive Stock in the hands of any holder
other than Executive, and each such other holder of Executive Stock will succeed
to all rights and obligations attributable to Executive as a holder of Executive
Stock hereunder. Executive Stock will also include shares of the Company's
capital stock issued with respect to shares of Executive Stock by way of a stock
split, stock dividend or other recapitalization.

     8.  Adjustments to Units.  The Units will be equitably adjusted for any
         --------------------
stock split, stock dividend, reclassification or recapitalization of the Company
which occurs subsequent to the date hereof.

     9.  Rights as Stockholder.  Except as specifically set forth herein, until
         ---------------------
the Units vest and are converted in accordance with this Agreement, with respect
to the Units, Executive shall not be entitled to any rights as a stockholder of
the Company or as a holder of Common Stock. For clarification, the Units do not
constitute capital stock of the Company, but rather represent the right (under
the circumstances set forth in this Agreement) to acquire Common Stock.

     10. Incorporation of Certain Provisions of the 1999 Plan. Reference is made
         -----------------------------------
to that certain Dade Behring Holdings, Inc. 1999 Management Stock Option Plan,
as the same may be amended from time to time (the "Plan"). The parties hereto
                                                   ----
agree that Sections 6 [Participation Rights], 9 [Sale of the Company] and 10
[Public Offering] of the Plan, together with the definitions of "Approved Sale"
and "Fair Market Value" contained in the Plan are hereby incorporated into this
Agreement by reference (all such incorporated provisions being referred to
herein collectively as the "Incorporated Plan Provisions"). It is the intent of
                            ----------------------------
the parties hereto that the Executive and the Company have the benefits and the
burdens of the Incorporated Plan Provisions as if the

                                      -6-
<PAGE>

Incorporated Plan Provisions were fully set forth herein, and for such purposes,
as if the Executive Stock had been issued pursuant to the Plan. The Incorporated
Plan Provisions shall be deemed modified herein as and to the extent such
provisions set forth in the Plan are modified in accordance with the terms and
conditions of the Plan.

     11.  Dividends. Beginning as of the date hereof, any cash dividends paid
          ---------
with respect to Common Stock issuable upon conversion of the Units prior to the
Units becoming vested and converted into Common Stock shall not be paid to
Executive and shall be retained by the Company and shall be paid to Executive
only to the extent and only if such Units become vested and converted into
Common Stock pursuant to Section 3(a) hereof. If Executive has elected to defer
                         ------------
delivery of such Units pursuant to Section 3(b) hereof, Executive may elect to
                                   ------------
defer payment of such dividends until the date of delivery of the Executive
Stock. After conversion of the Units, all shares of Executive Stock will be
entitled to dividends paid with respect to Common Stock.  Executive shall have
no right to dividends with respect to any Units which do not vest and expire
pursuant to Section 3(a) hereof.
            ------------

     12.  Taxes. The Company shall be entitled, if necessary or desirable, to
          -----
withhold (or secure payment from Executive in lieu of withholding) the amount of
any withholding or other tax due from the Company with respect to any amount
payable and/or Common Stock issuable upon conversion of the Units under this
Agreement or any other agreement (including any employment agreement), and the
Company may defer such payment unless indemnified to its satisfaction.

     13.  Notices. Any notice provided for in this Agreement must be in writing
          -------
and must be personally delivered, received by certified mail, return receipt
requested, or sent by guaranteed overnight delivery service, to the recipients
at the address indicated below:

     To the Company:

     Dade Behring Holdings, Inc.
     1717 Deerfield Road
     Deerfield, Illinois 60016
     Attn: Board of Directors

     With a copy to:

     Bain Capital, Inc.
     Two Copley Place
     Boston, Massachusetts 02116
     Attn: John P. Connaughton

     and:

     Kirkland & Ellis
     200 East Randolph Drive
     Chicago, Illinois 60601
     Attn: Matthew E. Steinmetz

                                      -7-
<PAGE>

     To Executive:

     James Reid-Anderson
     1160 North Sheridan Road
     Lake Forest, Illinois 60045

or such other address or to the attention of such other person as the recipient
party shall have specified by prior written notice to the sending party. Any
notice under this Agreement will be deemed to have been given when so delivered
or mailed.

     14.  Severability. Whenever possible, each provision of this Agreement
          ------------
will be interpreted in such manner as to be effective and valid under applicable
law, but if any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or the effectiveness or validity of any provision in any
other jurisdiction, and this Agreement will be reformed, construed and enforced
in such jurisdiction as if such invalid, illegal or unenforceable provision had
never been contained herein.

     15.  Complete Agreement. This Agreement embodies the complete agreement and
          ------------------
understanding among the parties and supersedes and preempts any prior
understandings, agreements or representations by or among the parties, written
or oral, which may have related to the subject matter hereof in any way,
including, without limitation, any bonus arrangements upon a consummation of a
sale of the Company or any of its Subsidiaries.

     16.  Counterparts. This Agreement may be executed in separate counterparts
          ------------
(any one of which may be by facsimile), each of which will be deemed to be an
original and all of which taken together will constitute one and the same
agreement.

     17.  Successors and Assigns.  This Agreement is intended to bind and inure
          ----------------------
to the benefit of and be enforceable by Executive and the Company and their
respective successors and assigns; provided that, Executive may not assign any
                                   --------
of his rights or obligations, except as expressly provided by the terms of this
Agreement.

     18.  Governing Law. The corporate law of Delaware will govern all issues
          -------------
concerning the relative rights of the Company and its stockholders. All other
issues concerning the enforceability, validity and binding effect of this
Agreement will be governed by and construed in accordance with the laws of the
State of Illinois, without giving effect to any choice of law or conflict of law
provision or rule (whether of the State of Illinois or any other jurisdiction)
that would cause the application of the law of any jurisdiction other than the
State of Illinois.

     19.  Remedies. The parties hereto agree and acknowledge that money damages
          --------
may not be an adequate remedy for any breach of the provisions of this Agreement
and that any party hereto will have the right to injunctive relief, in addition
to all of its other rights and remedies at law or in equity, to enforce the
provisions of this Agreement.

                                      -8-
<PAGE>

     20.  Effect of Transfers in Violation of Agreement. The Company will not
          ---------------------------------------------
be required (a) to transfer on its books any shares of Executive Stock or Units
which have been sold or transferred in violation of any of the provisions set
forth in this Agreement or (b) to treat as owner of such shares or Units, to
accord the right to vote as such owner or to pay dividends to any transferee to
whom such shares or Units have been transferred in violation of this Agreement.

     21.  Amendments and Waivers. Any provision of this Agreement may be amended
          ----------------------
or waived only with the prior written consent of the Company and Executive.

                           *     *     *     *     *

                                      -9-
<PAGE>

     IN WITNESS WHEREOF, the parties have executed this Restricted Stock Unit
Agreement on the day and year first above written.

                              DADE BEHRING HOLDINGS, INC.

                                      /s/ Stephen Pagliuca
                              By:   -----------------------------------

                              Title:  _________________________________

                              /s/ JAMES REID-ANDERSON
                              -----------------------------------------
                              JAMES REID-ANDERSON
<PAGE>

                                   EXHIBIT A
                                   ---------

                [Dated 6 months prior to Vesting Date or before]

Dade Behring Holdings, Inc.
1717 Deerfield Road
Deerfield, Illinois 60016
Attention: Board of Directors

          Pursuant to Section 3(b) of that certain Restricted Stock Unit
Agreement dated as of September 1, 2000, I hereby elect to defer the
distribution of _________ shares of Executive Stock which may vest on the
Vesting Date until __________, 20__. In other words, no certificates
representing ________ shares of Executive Stock shall be delivered to me until
__________, 20__.

                                                Sincerely,

                                                James Reid-Anderson

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