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                                                                   EXHIBIT 10.27

                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (this "Agreement") is made and entered into
as of October 1, 2003 (the "Effective Date") by and between LUMINEX CORPORATION,
a Delaware corporation ("Luminex") and DAVID S. REITER ("Executive").

                                     RECITAL

         WHEREAS, Executive is to be employed as the Vice President, General
Counsel and Corporate Secretary of Luminex;

         WHEREAS, Luminex and Executive wish to document the terms of the
employment of Executive in such capacity; and

         WHEREAS, Executive has represented to Luminex and Luminex has relied on
Executive's representation that the execution of this Agreement by Executive,
and the provision of services by Executive to Luminex as contemplated in this
Agreement, will not conflict with, or cause Executive or any other person or
entity to be in breach of, (i) any other contract to which Executive is a party
or (ii) any duty which Executive may owe to any other person or entity.

                                    AGREEMENT

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

         1.       DUTIES.

                  1.1      Duties. During the term of this Agreement (including
all renewal periods, if any, the "Term"), Executive agrees to be employed by and
to serve Luminex as Vice President, General Counsel and Corporate Secretary and
Luminex agrees to employ and retain Executive in such capacity subject to the
provisions of this Agreement. Executive shall have such powers, authority and
duties, and shall render such services of executive and administrative
character, or act in such other capacity for Luminex, as the Chief Executive
Officer or the Board of Directors of Luminex (the "Board") shall from time to
time lawfully direct and Executive shall report directly to the Chief Executive
Officer of Luminex. Executive shall devote all of his business time, energy, and
skill to the business of Luminex; provided, however, that Executive shall be
permitted to continue his administrative and marketing responsibilities on
behalf of Phillips & Reiter, PLLC, but only to the extent such activities
neither (i) conflict with Executive's obligations set forth under this Agreement
nor (ii) detract from Executive's contribution to Luminex as a full-time
employee or Executive's responsibilities and duties as Vice President, General
Counsel and Corporate Secretary of Luminex. Luminex and Executive agree that, in
the event any dispute should arise between Luminex and Executive in respect of
the exception

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articulated in the immediately preceding sentence, the preceding sentence shall
be construed in the manner most favorable to Luminex.

                  1.2      Special Provisions Regarding Part Time Employment.
Notwithstanding anything to the contrary contained in Section 1.1 or elsewhere
in this Agreement, during the period (the "Part Time Period") commencing on the
Effective Date and ending on January 15, 2004, Executive shall be obligated to
work only four days each week.

         2.       TERM AND TERMINATION.

                  2.1      Term. Subject to Section 2.2, the term of employment
of Executive by Luminex shall be one (1) year commencing on the Effective Date
and shall thereafter automatically renew for successive additional one-year
terms unless either party provides the other with written notice of its intent
not to renew this Agreement at least sixty (60) days prior to the end of the
Term (unless terminated earlier pursuant to the provisions of this Agreement).

                  2.2      Termination of Employment.

                           2.2.1  Termination For Cause. "Termination For Cause"
shall mean the termination by Luminex of Executive's employment with Luminex as
the result of Executive's material fraud upon Luminex or Executive's continued
material breach of this Agreement after receipt of written notice from Luminex
specifying such breach and failure by Executive to cure such breach within
fifteen (15) days from receipt of such notice. Executive's inability to perform
his obligations under this Agreement despite his best efforts as a result of a
permanent or temporary disability (as evidenced by a written determination from
a physician chosen by Executive and reasonably acceptable to Luminex) shall not
result in a Termination For Cause. In the event that Executive fails to cure the
breach within the fifteen (15) day cure period, the termination shall be
effective as of the date that Luminex notifies Executive of his termination
following the expiration of the fifteen (15) day cure period. Upon any
Termination For Cause, Executive shall be paid the Accrued Obligations (defined
below) within three (3) business days following the effective date of
termination.

                           2.2.2  Termination Other Than For Cause. "Termination
Other Than For Cause" shall mean (i) termination by Luminex of Executive's
employment with Luminex for any reason other than Termination For Cause,
Termination by Reason of Death, Termination by Reason of Incapacity or
Termination Upon Expiration of Agreement or (ii) termination by Executive upon
constructive termination of Executive's employment with Luminex by reason of (A)
a reduction in Executive's Base Salary (defined below); (B) a reduction in
Executive's title from Vice President, General Counsel and Corporate Secretary
of Luminex (whether by reason of Executive's removal from any of such offices or
Luminex's failure to reappoint Executive to any of such offices); (C) a Material
Diminution (defined below); (D) a requirement that Executive change his
principal place of business to a location that is outside the Office Area
(defined below), or (E) Luminex's continued material breach of this Agreement
after receipt of written notice from Executive specifying such breach and
failure by Luminex to cure such breach within fifteen (15) days from receipt of
such notice. Termination Other Than For Cause

                                       -2-

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may be effected by Luminex at any time by providing Executive with written
notice of such termination. The termination shall be effective as of the date of
the notice or such later date as may be determined by Luminex. Executive may
also effect a Termination Other Than For Cause upon written notice to Luminex at
any time any of the conditions for constructive termination set forth in clause
(ii) above (including without limitation, if applicable, the expiration of the
cure period) have been met. Upon any Termination Other Than For Cause, Executive
shall be paid (i) within three (3) business days following the effective date of
termination the amount of the Accrued Obligations and (ii) all severance
compensation provided in Section 4.1. For purposes of this Agreement, "Material
Diminution" means a material diminution by Luminex of Executive's duties,
powers, authority, functions or responsibilities without Executive's consent,
such that Executive is left with such duties, powers, authority, functions and
responsibilities (when viewed in the aggregate) that are materially diminished
compared to both (i) those duties, powers, authority, functions and
responsibilities conferred upon Executive at the Effective Date and (ii) those
duties, powers, authority, functions and responsibilities that are most
typically conferred upon the employee general counsel of companies having both
(i) an employee general counsel and (ii) revenues comparable to Luminex (based
on the revenues of Luminex at the time of determination). Luminex and Executive
agree that in the event there is an ambiguity with respect to the interpretation
or application of the definition of "Material Diminution", such ambiguity shall
be resolved according to the reasonable interpretation of such definition most
favorable to Luminex. For purposes of this Agreement, "Office Area" means the
geographical area within a 40 mile radius of Luminex's current principal office
at 12212 Technology Blvd., Austin, Texas.

                           2.2.3  Actual Voluntary Termination. "Actual
Voluntary Termination" shall mean termination by Executive of Executive's
employment with Luminex for any reason other than Termination For Cause,
Termination Other Than For Cause, Termination by Reason of Death or Termination
by Reason of Incapacity. In the event of an Actual Voluntary Termination,
Executive shall be paid within three (3) business days following the effective
date of termination the amount of the Accrued Obligations.

                           2.2.4  Termination by Reason of Incapacity. If,
during the Term, Executive shall become Permanently Disabled (defined below),
Luminex may terminate Executive's employment with Luminex effective on the
earliest date permitted under applicable law, if any, and such termination shall
be deemed "Termination by Reason of Incapacity". Upon termination of employment
under this Section, Executive shall be paid (i) within three (3) business days
following the effective date of termination the amount of the Accrued
Obligations and (ii) all severance compensation provided in Section 4.2. As used
herein, Executive shall be deemed "Permanently Disabled" if Executive is (i)
collecting long-term disability payments under a long-term disability plan
established for the benefit of Luminex's employees or executives generally or a
reasonably similar plan or (ii) if, and only if, no such long-term disability
plan is in effect at the time of determination, a physician selected by Luminex
and reasonably acceptable to Executive makes a written determination that
Executive is unable to perform his obligations under this Agreement despite his
best efforts by reason of any medically determinable physical or mental
impairment that can be expected to result in death or that has lasted or can be
expected to last for a continuing period of not less than 12 months.

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                           2.2.5  Termination by Reason of Death. In the event
of Executive's death during the Term, Executive's employment with Luminex shall
be deemed to have terminated as of the date on which his death occurs and the
estate of Executive shall be paid (i) within fifteen (15) days following the
effective date of termination the amount of the Accrued Obligations and (ii) all
severance compensation provided in Section 4.3.

                           2.2.6  Termination Upon Expiration of Agreement. In
the event that Luminex refuses for any reason to extend this Agreement by giving
written notice at least 60 days prior to the initial or any renewal period as
set forth in Section 2.1, Executive shall be paid (i) within three (3) business
days following the effective date of termination the amount of the Accrued
Obligations and (ii) all severance compensation provided in Section 4.4. In the
event that Executive refuses for any reason (except as otherwise provided
herein) to extend this Agreement by giving written notice at least 60 days prior
to the initial or any renewal period as set forth in Section 2.1, the
termination shall be deemed an Actual Voluntary Termination.

                           2.2.7  Termination of Relationship with Affiliated
Entities. Unless agreed by Luminex (or a subsidiary thereof) and Executive in a
separate written agreement (other than corporate minutes, resolutions, charter
documents, bylaws and partnership agreements), upon the termination of
Executive's employment with Luminex for any reason, Executive shall tender a
written resignation of any positions he may have with Luminex and any and all of
Luminex's direct and indirect subsidiaries.

                           2.2.8  Definition of Accrued Obligations. As used in
this Agreement, "Accrued Obligations" means all accrued but unpaid salary,
accrued but unpaid vacation, sick leave, and similar pay (all determined in
accordance with Luminex's policies then in effect), and any appropriate business
expenses incurred by Executive in connection with his duties hereunder, all to
the date of termination.

         3.      SALARY, BENEFITS AND BONUS COMPENSATION.

                  3.1      Base Salary. As payment for the services to be
rendered by Executive as provided in Section 1 and subject to the terms and
conditions of Section 2, Luminex agrees to pay to Executive a "Base Salary" at
the rate of $15,000 per month during the Part Time Period and thereafter at the
rate of $210,000 per annum (or such greater amount as may be determined from
time to time by the Board or the Compensation Committee thereof) payable in
accordance with the then-current payroll policies of Luminex.

                  3.2      Bonuses. Executive may be eligible to receive a bonus
each year (provided, however, that Executive shall not be eligible to receive a
bonus in respect of the year ended December 31, 2003) in an amount up to 50% (or
such higher percentage as may be determined from time to time by the Board or
the Compensation Committee thereof) of Executive's Base Salary during the Term
and any extensions hereof, with the actual amount of any such bonus to be
determined in the sole discretion of the Board. The Board is under no obligation
to declare, and Luminex is under no obligation to pay, any bonus to Executive
under the terms of this Agreement. In the event Executive and Luminex are
parties to a written

                                       -4-

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agreement or plan executed by both Luminex and Executive that governs bonus
arrangements, and the provisions thereof conflict with this Section 3.2, the
terms of such other written agreement or plan shall supersede this Section 3.2.

                  3.3      Change in Control. In the event that both (i) a
Change in Control (defined below) of Luminex occurs during the Term and (ii)
Executive's employment with Luminex (or, as applicable, its successor in
interest) terminates for any reason (including without limitation an Actual
Voluntary Termination by Executive) at any time within six (6) months following
the occurrence of the Change in Control of Luminex, in lieu of any Severance
Compensation then owed or that otherwise would be owed in the future to
Executive under Section 4 of this Agreement, Luminex (or its successor in
interest) shall pay Executive both the Accrued Obligations and a lump sum
payment (the "Change in Control Payment") in an aggregate amount equal to the
sum of (i) the Bonus Amount (defined below), plus (ii) an amount equal to
Executive's annual Base Salary (at the highest rate in effect during the period
beginning six months immediately prior to the effective date of the Change of
Control through the date of termination) within three (3) business days after
the termination of Executive's employment. In the interest of clarity, Luminex
and Executive agree that, upon the termination of Executive's employment at any
time within six (6) months following the occurrence of the Change in Control of
Luminex, the provisions of Sections 4.1, 4.2, 4.3, 4.4, and 4.6 shall
automatically be deemed null and void and shall not apply with respect to any
termination of Executive's employment (whether such termination is effected in
connection with the Change in Control of Luminex or at any time in the future
following the Change in Control of Luminex), and under no circumstances shall
Luminex ever be obligated to pay Executive both a Change in Control Payment and
Severance Compensation under Section 4. For purposes of this Agreement, a
"Change in Control" of Luminex shall be deemed to have occurred if, after the
date of this Agreement:

         (A) any "Person" (as such term is used in Sections 13(d) and 14(d) of
the Securities Exchange Act of 1934, as amended (the "Exchange Act")) (other
than an Approved Person (as defined below)) becomes the "Beneficial Owner" (as
defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of a
majority or more of the then outstanding Common Stock of Luminex ("Common
Stock") (such Person, an "Acquiring Person"); or

         (B) Luminex merges or consolidates with any other corporation or other
entity, in each case other than a merger or consolidation which results in the
voting securities of Luminex outstanding immediately prior thereto continuing to
represent (either by remaining outstanding or by being converted into voting
securities of the surviving entity) at least a majority of the combined voting
power of the voting securities of Luminex or such surviving entity outstanding
immediately after such merger or consolidation; or

         (C) Luminex sells or disposes of all or substantially all of Luminex's
assets in one transaction or a series of related transactions; or

         (D) Luminex files a periodic or current report or proxy statement with
the Securities and Exchange Commission (the "SEC") disclosing that a "change in
control" (as such term is used in Item 1 of Form 8-K promulgated by the SEC) of
Luminex has occurred; or

                                      -5-

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          (E) If, as a result of nominations made by a person or group other
than the Board of Directors of Luminex, individuals who prior to such
nominations constitute the Directors of Luminex cease for any reason to
constitute at least a majority thereof within the two year period following such
nominations.

         As used in this Agreement, "Approved Person" means (1) an employee
benefit plan of Luminex (or a trustee or other fiduciary holding securities for
such a plan), or (2) a corporation owned, directly or indirectly, by the
stockholders of Luminex in substantially the same proportions as their ownership
of stock of Luminex, or (3) a Person not less than a majority of whose voting
securities are Beneficially Owned by Luminex after giving effect to the
transaction.

         As used in this Agreement, "Bonus Amount" means the annual bonus (if
any) received or to be received by Executive under Section 3.2 in respect of the
then most recently completed calendar year, or if no determination concerning
bonuses has been made for the most recently completed calendar year, then the
annual bonus (if any) for the previous calendar year.

         Any options ("Options") granted (including without limitation Options
that may be granted in the future) and restricted stock ("Restricted Stock")
issued (including without limitation Restricted Stock that may be issued in the
future) to Executive pursuant to any incentive plan of Luminex shall immediately
vest upon a Change in Control. Luminex shall take no action to facilitate a
transaction involving a Change in Control, including without limitation
redemption of any rights issued pursuant to any rights agreement, unless it has
taken such action as may be necessary to ensure that Executive has the
opportunity to exercise all Options he may then hold, and obtain certificates
containing no restrictive legends in respect of any Restricted Stock he may then
hold, at a time and in a manner that shall give Executive the opportunity to
sell or exchange the securities of Luminex acquired upon exercise of his Options
and upon receipt of unrestricted certificates for shares of Common Stock in
respect of his Restricted Stock, if any (collectively, the "Acquired
Securities"), at the earliest time and in the most advantageous manner any
holder of the same class of securities as the Acquired Securities is able to
sell or exchange such securities in connection with such Change in Control.
Luminex acknowledges that its covenants in the preceding sentence (the
"Covenants") are reasonable and necessary in order to protect the legitimate
interests of Luminex in maintaining Executive as one of its employees and that
any violation of the Covenants by Luminex would result in irreparable injuries
to Executive, and Luminex therefore acknowledges that in the event of any
violation of the Covenants by Luminex or its directors, officers or employees,
or any of their respective agents, Executive shall be entitled to obtain from
any court of competent jurisdiction temporary, preliminary and permanent
injunctive relief in order to (i) obtain specific performance of the Covenants,
(ii) obtain specific performance of the exercise of his Options, delivery of
certificates containing no restrictive legends in respect of his Restricted
Stock and the sale or exchange of the Acquired Securities in the advantageous
manner contemplated above or (iii) prevent violation of the Covenants; provided
nothing in this Agreement shall be deemed to prejudice Executive's rights to
damages for violation of the Covenants. In the event that the terms of any
separate written agreement concerning Options granted or Restricted Stock issued
to Executive conflict with the terms of this paragraph, the terms of this
paragraph shall control.

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                  3.4      Additional Benefits. During the Term, Executive shall
be entitled to the following fringe benefits:

                           3.4.1  Benefits and Vacation. Executive shall be
eligible to participate in such of Luminex's benefits and deferred compensation
plans as are now generally available or later made generally available to
executive officers of Luminex. A termination or expiration of this Agreement for
any reason or for no reason shall not affect any rights which Executive may have
pursuant to any agreement, policy, plan, program or arrangement of Luminex
providing Executive benefits (including under any stock option agreement or
bonus plan or agreement which may exist), which rights shall be governed by the
terms thereof. Executive shall be entitled to three (3) weeks paid vacation each
calendar year (prorated for partial years), except that Executive shall not be
entitled to any vacation during the Part Time Period. Unless approved in advance
by the Board or a committee thereof, accrued vacation not taken in any
applicable period shall not be carried forward or used in any subsequent period.

                           3.4.2  Reimbursement for Expenses.

                                  3.4.2.1  Incidental Expenses. Luminex shall
reimburse Executive for reasonable and properly documented out-of-pocket
business and/or entertainment expenses incurred by Executive in connection with
his duties under this Agreement. Any such expenses shall be submitted by
Executive to Luminex on a periodic basis and will be paid in accordance with
standard Luminex policies and procedures.

                                  3.4.2.2  Moving Expenses. In the event of the
relocation of Luminex's headquarters to a location that is outside the Office
Area and Executive elects to relocate, Luminex shall (i) reimburse Executive for
any reasonable, out-of-pocket and adequately documented moving expenses incurred
by Executive in connection with the transfer of his residence and (ii) pay to an
Executive an amount of cash reasonably calculated by Luminex to negate adverse
income tax consequences to Executive of the foregoing reimbursement.

         4.       SEVERANCE COMPENSATION.

                  4.1      Severance Compensation in the Event of a Termination
Other Than For Cause. In the event Executive's employment is terminated as a
result of a Termination Other Than for Cause, Executive shall be paid (subject
to Section 4.6) the Severance Compensation (defined below).

                  4.2      Severance Compensation for Termination by Reason of
Incapacity. In the event Executive's employment is terminated as a result of a
Termination by Reason of Incapacity, Executive shall be paid (subject to Section
4.6) the difference of (i) the Severance Compensation less (ii) any payment or
payments received by Executive during the twelve (12) month period from the time
of termination under any long-term disability plan in effect that provides
benefits to Executive.

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                  4.3      Severance Compensation for Termination by Reason of
Death. In the event Executive's employment is terminated as a result of
Executive's death, the estate of Executive shall be paid the Severance
Compensation.

                  4.4      Severance Compensation In the Event Of A Failure Of
Luminex To Renew This Agreement. In the event Luminex fails or otherwise refuses
for any reason to extend this Agreement beyond the Term and any extensions
thereof, Executive shall be paid (subject to Section 4.6) the Severance
Compensation.

                  4.5      No Severance Compensation Upon Other Termination. In
the event of an Actual Voluntary Termination or Termination For Cause, Executive
shall not be paid any severance compensation.

                  4.6      Conditions to Payment; Sole Remedy. Executive shall
not be entitled to receive any compensation or other payment pursuant to
Sections 4.1, 4.2 or 4.4 unless Executive shall have executed and delivered to
Luminex a release substantially in the form attached hereto as Exhibit "A" and,
provided Luminex has also signed such release within two (2) business days of
execution and delivery by Executive, all revocation and waiting periods
applicable to such release have expired (if Luminex fails to sign such release,
then such revocation and waiting periods shall not apply). In addition, in the
event that Executive breaches any of the restrictive covenants set forth in
Article 5 at any time, Luminex shall be entitled to discontinue any compensation
or other payments pursuant to Sections 4.1, 4.2 or 4.4 (provided, however, that
if it is finally determined by a court of competent jurisdiction or an
arbitrator that Luminex asserted in bad faith that Executive breached any of the
restrictive covenants set forth in Article 5, the payments of the Severance
Compensation shall be extended for two months for each calendar month that
payments were delayed. The compensation to be paid to Executive pursuant to
Sections 4.1, 4.2, 4.3 or 4.4 shall represent the sole and exclusive remedy of
Executive in connection with the termination of his employment and this
Agreement upon a Termination Other Than for Cause, a Termination by Reason of
Incapacity, a termination in connection with Executive's death, or a refusal by
Luminex to extend this Agreement beyond the Term and any extensions thereof.

                  4.7      Definition of Severance Compensation. As used in this
Agreement, "Severance Compensation" means an amount equal to the sum of (i) the
Bonus Amount plus (ii) an amount equal to Executive's annual Base Salary (at the
highest rate in effect for the six month period immediately prior to the date of
termination), paid in semi-monthly installments for a period of twelve (12)
months from the date of termination. In addition, as part of the Severance
Compensation, Luminex also shall pay (until the earlier of (A) the first annual
anniversary of the termination of this Agreement or (B) the date that Executive
is eligible to be covered under a comparable or more favorable health plan of
another Person) (i) COBRA payments in respect of the continuation of health
benefits for Executive, his spouse and his children and (ii) payments to fund
dental coverage for Executive, his spouse and his children comparable to the
dental coverage that they would have received if Executive had continued as an
employee of Luminex.

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         5.       PROTECTION OF LUMINEX.

                  5.1      Non-Competition. Ancillary to the otherwise
enforceable agreements set forth in this Agreement, Executive agrees that during
Executive's employment with Luminex and for a period of one year following
termination of employment, whether such termination occurs at the insistence of
Executive or Luminex for any reason, Executive shall not compete directly or
indirectly in any way with the business of Luminex anywhere in the world where
Luminex conducted business during the Term. For purposes of this Agreement,
"compete directly or indirectly in any way with the business of Luminex" means
to become an employee, consultant, advisor, manager, member, director of or
beneficially own more than three percent of any individual, company or entity
that competes with Luminex in the Core Business (defined below) at the time of
determination. Executive agrees that the assertion or existence of any claim by
Executive against Luminex shall not be a defense to the enforcement of this
paragraph by injunction or otherwise. As used in this Agreement, "Core Business"
means the development, manufacturing and/or marketing of biological testing
technologies with applications in the life-sciences industry.

                  5.2      Nonsolicitation. Ancillary to the otherwise
enforceable agreements set forth in this Agreement, Executive agrees that, for a
period of one (1) year subsequent to the termination of Executive's employment
with Luminex, whether such termination occurs at the insistence of Executive or
Luminex for any reason, Executive shall not recruit, hire, or attempt to recruit
or hire, directly or by assisting others, any other employees of Luminex, nor
shall Executive contact or communicate with any other employees of Luminex for
the purpose of inducing other employees to terminate their employment with
Luminex. For purposes of this covenant, "other employees of Luminex" shall refer
to employees who are still actively employed by, or doing business with, Luminex
or a subsidiary of Luminex at the time of the attempted recruiting or hiring.

                  5.3      Remedies. Due to the irreparable and continuing
nature of the injury which would result from a breach of the covenants described
in Sections 5.1 and 5.2, Executive agrees that Luminex may, in addition to any
remedy which Luminex may have at law or in equity, apply to any court of
competent jurisdiction for the entry of an immediate order to restrain or enjoin
the breach of this covenant and to otherwise specifically enforce the provisions
of the covenants set forth in Sections 5.1 and 5.2.

                  5.4      Acknowledgment. Executive acknowledges and agrees
that the restrictions set forth above are ancillary to an otherwise enforceable
agreement and supported by independent valuable consideration as required by

TEX. BUS. & COMM. CODE ANN. Section 15.50. Executive further acknowledges and
agrees that the limitations as to time, geographical area, and scope of activity
to be restrained by Sections 5.1 and 5.2 are reasonable and acceptable to
Executive, and do not impose any greater restraint than is reasonably necessary
to protect the goodwill and other business interests of Luminex.

                  5.5      Reformation and Severance. If a judicial
determination is made that any of the provisions of the above restriction
constitutes an unreasonable or otherwise unenforceable

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restriction against Executive, it shall be rendered void only to the extent that
such judicial determination finds such provisions to be unreasonable or
otherwise unenforceable. In this regard, the parties hereby agree that any
judicial authority construing this Agreement shall be empowered to sever any
portion of the prohibited business activity from the coverage of this
restriction and to apply the restriction to the remaining portion of the
business activities not so severed by such judicial authority. Moreover,
notwithstanding the fact that any provisions of this restriction are determined
by a court not to be specifically enforceable through injunctive relief, Luminex
shall nevertheless be entitled to seek to recover monetary damages as a result
of the breach of any provision which is not reformed by a court. The time period
during which the restrictions shall apply shall be tolled and suspended as to
Executive for a period equal to the aggregate quantity of time during which
Executive violates such prohibitions in any respect.

                  5.6      Confidential Information and Trade Secrets. As used
herein, "Confidential Information" means any data or information that is
important, competitively sensitive, and not generally known by the public or
persons involved in the biological testing or life sciences industries,
including, but not limited to, Luminex's business plans, Prospective Customers,
training manuals, proprietary software, product development plans, bidding and
pricing procedures, market plans and strategies, projections, internal
performance statistics, financial data, confidential personnel information
concerning employees of Luminex, operational or administrative plans, policy
manuals, and terms and conditions of contracts and agreements. The term
"Confidential Information" shall not apply to information which is (i) already
in Executive's possession (unless such information was obtained by Executive
from Luminex in the course of Executive's employment by Luminex); (ii) received
by Executive from a third party with, to Executive's knowledge, no restriction
on disclosure or (iii) required to be disclosed by any applicable law or by an
order of a court of competent jurisdiction.

         Executive recognizes and acknowledges that the Confidential Information
constitutes valuable, special and unique assets of Luminex and its affiliates.
Except as required to perform Executive's duties as an Executive of Luminex,
until such time as they cease to be Confidential Information through no act of
Executive in violation of this Agreement, Executive will not use or disclose any
Confidential Information of Luminex. Upon the request of Luminex and, in any
event, upon the termination of this Agreement for any reason, Executive will
surrender to Luminex (i) all memoranda, notes, records, drawings, manuals or
other documents pertaining to Luminex's business including all copies and/or
reproductions thereof and (ii) all materials involving any Confidential
Information of Luminex.

                  5.7      Preservation of Luminex Property. Executive
acknowledges that from time to time in the course of employment with Luminex,
Executive has had the opportunity to inspect and use certain property of
Luminex, both tangible and intangible, including but not limited to files,
records, documents, drawings, specifications, lists, equipment, graphics,
designs, and similar items relating to the business of Luminex. Executive
acknowledges and agrees that all such property, including but not limited to any
and all copies thereof, whether prepared by Executive or otherwise in the
possession of Executive, are and shall remain the exclusive property of Luminex,
that Executive shall have no right or proprietary interest in such property

                                      -10-

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and that Executive will safeguard and return to Luminex all such property upon
the earlier of (i) Luminex's request and (ii) the termination of Executive's
employment with Luminex.

                  5.8      Assignment of Inventions to Luminex. All computer
software, compilations, programs, improvements, inventions, notes, copyrightable
works, and opportunities for additional Luminex business, made, fixed,
conceived, or acquired by Executive during the Term are exclusively owned by
Luminex, are Luminex's works for hire, and fully assigned to Luminex including
without limitation all rights to renewals, extensions, causes of action,
reproduce, prepare derivative works, distribute, display, perform, transfer,
make, use and sell and may never be copied, used, or disclosed without Luminex's
express written consent. Executive will sign on request any documents affirming
the same for any particular item.

                  5.9      Notice to Subsequent Employers. Executive agrees
that, prior to commencing any new employment in the Core Business within twelve
months after the termination of this Agreement, Executive will furnish the new
employer with a copy of this Agreement. Executive also agrees that Luminex may
advise any new or prospective employer of the existence and terms of this
Agreement and furnish the employer with a copy of this Agreement.

         6.      DISCLOSURE OF INVESTMENTS. Commencing upon Executive's
execution of this Agreement and at all times during the Term, Executive shall
keep the Board informed in writing of the nature and extent of Executive's
investments, stock holdings, or retention as a director, advisor or any similar
interest in any business or enterprise involved in the Core Business other than
Luminex; provided, however, that Executive shall not be required to disclose any
such investments or stock holdings that constitute less than 1% of such entity's
total obligations or total voting power.

         7.       ARBITRATION.

                  7.1      Exclusive Remedy. Arbitration shall be the sole and
exclusive remedy for resolving any claim or dispute which cannot be mutually
resolved between the parties to this Agreement with the exception of disputes
arising out of Executive's obligations under Article 5 or disputes arising out
of Luminex's obligations under the last paragraph of Section 3.3, which are not
subject to this arbitration provision; provided however, that the parties hereto
agree that they may bring action in any court of competent jurisdiction to
enforce any award granted pursuant to arbitration or to otherwise enforce this
Article 7. This includes, but is not limited to, termination, interpretation or
application of this Agreement or any other agreement or policy of Luminex, any
claim of violation of law relating to the employment relationship, including,
without limitation, any claim of employment discrimination or sexual harassment,
or harassment based on any other prohibited basis, or any claim by Luminex
against Executive. This Agreement is a waiver of the right to trial by a jury or
court.

                  7.2      Limitations. The request for arbitration must be made
within one (1) year from the date of the occurrence giving rise to the dispute
or claim; or, in the event of a statutory claim, the time set forth by statute.

                                      -11-

<PAGE>

                  7.3      Rules and Procedures. The arbitration will be
conducted under the rules and procedures for arbitration of employment disputes
of the American Arbitration Association. The arbitration shall take place in
Austin, Texas unless the parties mutually agree to another location.

                  7.4      Arbitrator's Authority. Upon finding that a claim is
meritorious or in favor of one of the parties to the dispute, the arbitrator or
arbitrators shall have the authority to order legal and equitable remedies
appropriate as permitted by law.

                  7.5      Expenses. Costs of obtaining and paying the arbiter
and the costs associated with conducting the arbitration, including obtaining a
facility to be used during the arbitration, shall be paid by Luminex. Other
costs of the arbitration or any litigation associated with any dispute arising
under or in connection with this Agreement including, without limitation,
reasonable attorneys' and experts' fees and expenses of Luminex and the
Executive shall be borne by the party incurring such expense unless the arbiter
or court of law, as the case may be, awards costs to one of the parties.

         8.       MISCELLANEOUS.

                  8.1      Waiver. The waiver of the breach of any provision of
this Agreement shall not operate or be construed as a waiver of any subsequent
breach of the same or other provision hereof.

                  8.2      Entire Agreement; Modifications. Except as otherwise
provided herein, this Agreement represents the sole, entire, and complete
understanding among the parties with respect to the subject matter hereof, and
this Agreement supersedes any and all prior understandings, agreements, plans
and negotiations, whether written or oral, with respect to the subject matter
hereof, including without limitation any understandings, agreements or
obligations respecting any past or future compensation, bonuses, reimbursements
or other payments to Executive from Luminex. All modifications to the Agreement
must be in writing and signed by both Executive and Luminex.

                  8.3      Notices. All notices and other communications under
this Agreement shall be in writing and shall be given by facsimile or first
class mail, certified or registered with return receipt requested, and shall be
deemed to have been duly given three business days after mailing or one business
day after transmission of a facsimile (with confirmation of receipt) to the
respective persons named below:

                  If to Luminex:                     Luminex Corporation.
                                                     12212 Technology Blvd.
                                                     Austin, Texas 78727
                                                     Fax: (512) 219-5195
                                                     Attn: President

                                      -12-

<PAGE>

                  With a copy to                     Jackson Walker L.L.P.
                                                     901 Main Street, Suite 6000
                                                     Dallas, Texas 75202
                                                     Fax: (214) 953-5822
                                                     Attn: Michael E. Taten

                  If to Executive:                   David S. Reiter
                                                     9413 Savannah Ridge Drive
                                                     Austin, Texas 78726

Any party may change such party's address for notices by notice duly given
pursuant to this Section 8.3.

                  8.4      Headings. The Section headings herein are intended
for reference and shall not by themselves determine the construction or
interpretation of this Agreement.

                  8.5      Governing Law; Venue. This Agreement shall be
governed by and construed in accordance with the laws of the State of Texas.
Subject in all respects to Section 7 generally and Section 7.3 in particular,
any dispute arising out of or relating to this Agreement may be brought in a
court of competent jurisdiction located in Austin, Texas, and both of the
parties to this Agreement irrevocably submit to the exclusive jurisdiction of
such courts in any such dispute, waives any objection it may now or hereafter
have to venue or to convenience of forum, agrees that all claims in respect of
the dispute shall be heard and determined only in any such court, and agrees not
to bring any dispute arising out of or relating to this Agreement in any other
court. The parties agree that either or both of them may file a copy of this
paragraph with any court as written evidence of the knowing, voluntary and
bargained agreement among the parties irrevocably to waive any objections to
venue or to convenience of forum. Process in any dispute may be served on any
party anywhere in the world.

                  8.6      Severability. Should any court of competent
jurisdiction determine that any provision of this Agreement is illegal or
unenforceable to any extent, such provision shall be enforced to the extent
permissible and all other provisions of this Agreement shall continue to be
enforceable to the extent possible.

                  8.7      Counterparts. This Agreement may be executed in one
or more counterparts, all of which taken together shall constitute one and the
same Agreement.

                  8.8      Assignment. Neither this Agreement nor any duties or
obligations hereunder may be assigned by either party without the other party's
prior written consent; provided, however, that Luminex may assign this Agreement
to either (i) a wholly-owned subsidiary of Luminex (provided, however, that such
assignment shall not relieve Luminex of its obligations hereunder) or (ii) a
Person acquiring substantially all of Luminex's assets if such acquisition would
constitute a Change in Control.

                                      -13-

<PAGE>

                  8.9      Withholding. All compensation and benefits payable to
Executive hereunder shall be reduced by all federal, state, local and other
withholdings and similar taxes and payments required by applicable law.

                                      -14-

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.

                                      LUMINEX CORPORATION

                                      By: /s/ Thomas W. Erickson
                                          -------------------------------------

                                      EXECUTIVE

                                               /s/ David S. Reiter
                                      -----------------------------------------
                                                 David S. Reiter

                                      -15-

<PAGE>


                                   EXHIBIT "A"

                            GENERAL RELEASE AGREEMENT

         THIS GENERAL RELEASE AGREEMENT (this "Agreement") dated as of the day
of , _____________ __________, _______________ [FILL IN EFFECTIVE DATE OF
TERMINATION PURSUANT TO THE EMPLOYMENT AGREEMENT] (the "Effective Date"), is by
and between David S. Reiter ("Executive") and Luminex Corporation ("Luminex").

         WHEREAS, Executive's employment with Luminex has terminated pursuant to
that certain Employment Agreement dated as of October 1, 2003 (the "Employment
Agreement");

         NOW, THEREFORE, in consideration of the foregoing premises and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

         1.      Termination of Employment. Executive and Luminex hereby agree
that Executive's employment with Luminex has terminated pursuant to Section
_____ [FILL IN APPLICABLE SECTION] of the Employment Agreement effective as of
the Effective Date. To the extent he continues to hold any such positions or
directorships, Executive hereby resigns all positions and directorships he holds
with Luminex and any and all of Luminex's subsidiaries and affiliates.

         2.      Release by Executive. Executive, on his own behalf and on
behalf of the Executive Released Parties (defined below), hereby irrevocably and
unconditionally releases and forever discharges Luminex, its respective
subsidiaries and other affiliated and their respective agents, employees,
representatives, officers, directors, stockholders, trustees and attorneys, past
and present, and the heirs, successors and assigns of all of the foregoing
(collectively, the "Released Parties") from any and all debts, liabilities,
claims, demands, actions or causes of action, suits, judgments or controversies
of any kind whatsoever (except as set forth below) arising from Executive's
relationship (including without limitation as a stockholder) to, employment with
or service as an employee, officer, director, or manager of Luminex or its
subsidiaries and affiliates (collectively, the "Claims") against the Released
Parties, that now exist or that may arise in the future out of any matter,
transaction or event occurring prior to or on the Effective Date, including
without limitation, any claims of breach of contract or for severance or other
termination pay (except as set forth in Section 4 below), or claims of
harassment or discrimination (for example, on the basis of age, sex, race,
handicap, disability, religion, color or national origin) under any federal,
state or local law, rule or regulation, including, but not limited to the Age
Discrimination in Employment Act of 1967, 29 U.S.C. Section 621, et seq. Except
as set forth below, Executive further agrees not to file or bring any claim,
suit, civil action, complaint, arbitration or administrative action (any of the
foregoing, an "Action") in any city, state or federal court or agency or
arbitration tribunal with respect to any Claim against any of the Released
Parties or (except as may be required by law) assist any other person or entity
with any Action against any of the Released Parties. Notwithstanding anything to
the contrary contained

                                       1

<PAGE>

in this Agreement, Executive does not release any of the Released Parties and
shall not be prohibited from filing or bringing an Action with respect to any
right Executive otherwise may have now or in the future to (i) receive
distributions or dividends made in respect of Luminex's capital stock or (ii) be
indemnified by Luminex under the Certificate of Incorporation or Bylaws of
Luminex (as the same are currently in effect), any resolution adopted by the
Board of Directors of Luminex, or any other separate written agreement or
instrument requiring Luminex to indemnify Executive or (iii) receive workers'
compensation claims or (iv) receive Accrued Obligations (as such term is defined
in the Employment Agreement) or (v) receive Severance Compensation (as such term
is defined in the Employment Agreement) or (vi) stock, options, and other
equity-based compensation that vested prior to the Effective Date or that vests
subsequent to the Effective Date pursuant to the Employment Agreement or an
applicable Luminex long-term incentive plan (which stock, options or other
equity-based compensation shall be governed by the terms and provisions of the
applicable written agreement(s) or instrument(s) and/or the applicable Luminex
incentive plan) or (vii) vested benefits payable under retirement and other
employee benefit plans covering Executive (which benefits shall be governed by
the terms and provisions of the applicable plan).

         3.       Release by Luminex. Luminex, on its own behalf and on behalf
of the Released Parties, hereby irrevocably and unconditionally releases and
forever discharges Executive and his heirs, successors and assigns
(collectively, the "Executive Released Parties") from any and all Claims against
the Executive Released Parties, that now exist or that may arise in the future.
Except as set forth below, Luminex further agrees not to file or bring any
Action in any city, state or federal court or agency or arbitration tribunal
with respect to any Claim against any of the Executive Released Parties or
(except as may be required by law) assist any other person or entity with any
Action against any of the Executive Released Parties. Notwithstanding anything
to the contrary contained in this Agreement, Luminex does not release any of the
Executive Released Parties and shall not be prohibited from filing or bringing
an Action with respect to (i) a breach by Executive after the Effective Date of
any of Executive's obligations under the Employment Agreement that by their
terms survive termination of the Employment Agreement, including without
limitation the provisions of Article 5 of the Employment Agreement, or (ii) in
connection with any claim for indemnification by Executive, any obligation or
burden of proof applicable to Executive that is a condition to Executive's right
to be indemnified by Luminex under the Certificate of Incorporation or Bylaws of
Luminex (as the same are currently in effect), any resolution adopted by the
Board of Directors of Luminex, or any other separate written agreement or
instrument requiring Luminex to indemnify Executive or (iii) any Claims that
arise out of any criminal or fraudulent activity, willful misconduct or gross
negligence of Executive.

         4.       Severance Compensation. In consideration of Executive's
execution of this Agreement, Executive shall be entitled to receive from Luminex
the Severance Compensation under one of Section 4.1, 4.2 or 4.4 in the
Employment Agreement. Executive acknowledges that no other promise or agreements
of any kind have been made to Executive or with Executive by any person or
entity whatsoever to cause Executive to sign this Agreement. Executive further
acknowledges and agrees that the Severance Compensation, together with any other
payments or benefits that may be due under the terms of the Employment
Agreement, shall constitute full accord and satisfaction of all obligations,
including without limitation any and all severance

                                      2

<PAGE>

obligations, in connection with Executive's employment. Executive would not be
entitled to receive the Severance Compensation but for Executive's execution of
this Agreement.

         5.       Disclaimer of Liability. Executive acknowledges that this
Agreement shall not in any way be construed as an admission by Executive or any
of the Released Parties of any wrongful or illegal act against the other or any
other person, and that Executive and the Released Parties expressly disclaim any
liability of any nature whatsoever arising from or related to the subject of
this Agreement.

         6. COMPETENCY. EXECUTIVE ACKNOWLEDGES THE FOLLOWING:

                  a.       THAT HE FULLY COMPREHENDS AND UNDERSTANDS ALL OF THE
                           TERMS OF THIS AGREEMENT AND THEIR LEGAL EFFECTS;

                  b.       THAT HE IS COMPETENT TO EXECUTE THIS AGREEMENT;

                  c.       THAT IT IS EXECUTED KNOWINGLY AND VOLUNTARILY AND
                           WITHOUT RELIANCE UPON ANY STATEMENT OR REPRESENTATION
                           OF ANY RELEASED PARTY OR ITS REPRESENTATIVES;

                  d.       THAT HE HAS BEEN ADVISED IN WRITING TO CONSULT WITH
                           AN ATTORNEY BEFORE EXECUTING THIS AGREEMENT AND THAT
                           HE HAS HAD THE OPPORTUNITY TO CONSULT WITH AN
                           ATTORNEY OF HIS CHOICE REGARDING THIS AGREEMENT;

                  e.       THAT EXECUTIVE DOES NOT WAIVE RIGHTS OR CLAIMS THAT
                           MAY ARISE AFTER THE DATE THIS AGREEMENT IS EXECUTED;

                  f.       THAT EXECUTIVE WAIVES RIGHTS OR CLAIMS UNDER THIS
                           AGREEMENT ONLY IN EXCHANGE FOR CONSIDERATION IN
                           ADDITION TO ANYTHING OF VALUE TO WHICH THE EXECUTIVE
                           WAS ALREADY ENTITLED;

                  g.       [THAT HE HAS BEEN PROVIDED THE MATERIALS REGARDING
                           THE CLASS, UNIT, OR GROUP OF INDIVIDUALS ELIGIBLE FOR
                           THIS COMPENSATION AND THE TIME LIMITS APPLICABLE TO
                           SUCH PROGRAM;] [This clause to be included if
                           required by or advisable under applicable law.]

                  h.       [THAT HE HAS BEEN PROVIDED THE JOB TITLES AND AGES OF
                           ALL INDIVIDUALS ELIGIBLE OR SELECTED FOR THE PROGRAM
                           AND THE AGES OF ALL INDIVIDUALS IN THE SAME JOB
                           CLASSIFICATION OR ORGANIZATIONAL UNIT WHO ARE NOT
                           ELIGIBLE OR SELECTED FOR THE PROGRAM;] [This clause
                           to be included if required by or advisable under
                           applicable law.]

                                        3

<PAGE>

                  i.       THAT HE HAS HAD A PERIOD OF AT LEAST 21 DAYS [or 45
                           days, if required by or advisable under applicable
                           law] WITHIN WHICH TO CONSIDER THIS AGREEMENT;

                  j.       THAT FOR A PERIOD OF SEVEN DAYS FOLLOWING THE
                           EXECUTION OF THIS AGREEMENT, EXECUTIVE MAY REVOKE
                           THIS AGREEMENT AND IT SHALL NOT BECOME EFFECTIVE OR
                           ENFORCEABLE UNTIL THE SEVEN-DAY PERIOD HAS EXPIRED OR
                           SUCH LATER DATE AS PROVIDED FOR HEREIN.

         7.       Parties in Interest. This Agreement is for the benefit of the
Released Parties and shall be binding upon Executive and his representatives and
heirs.

         8.       Governing Law. This Agreement and the rights and obligations
of Executive hereunder shall be governed by and construed and enforced in
accordance with the substantive laws of the State of Texas.

         9.       Amendment. This Agreement may not be clarified, modified,
changed or amended except in writing and signed by Executive and Luminex or a
successor-in-interest of Luminex.

         10.      Non-disparagement. Executive agrees that he will refrain from
speaking ill of or making any disparaging comment about Luminex or Luminex's
management, other employees or contractors, following the termination of his
employment except as may be necessary or advisable, in the reasonable judgment
of Executive, to enforce his rights under this Agreement, enforce claims arising
after the Effective Date and not released in this Agreement, or defend a legal
action brought against Executive by any of the Released Party. Luminex agrees
that it will refrain from speaking ill of or making any disparaging comment
about Executive following the termination of his employment except as may be
necessary or advisable, in the reasonable judgment of Luminex, to (i) to enforce
its rights under the Employment Agreement or this Agreement not released in this
Agreement or (ii) defend a legal action brought against any of the Released
Parties by Executive or (iii) comply with applicable securities laws or protect
Luminex from potential liability.

         11.      Enforcement of Laws. Nothing in this Agreement affects the
rights and responsibilities of the Equal Employment Opportunity Commission (the
"Commission") to enforce the anti-discrimination laws, and this waiver does not
affect Executive's right to file a charge or participate in an investigation or
proceeding with the Commission. However, Executive waives any rights or claims,
known or unknown, to participate in any recovery under any proceeding or
investigation by the Commission or any state or local commission concerned with
the enforcement of anti-discrimination laws

         12.      Severability. If any provision of this Agreement is held to be
illegal, invalid or unenforceable under present or future laws, such provision
shall be fully severable and this Agreement shall be construed and enforced as
if such illegal, invalid or unenforceable provision never comprised a part
hereof; and the remaining provisions hereof shall remain in full force and

                                       4

<PAGE>

effect and shall not be affected by the illegal, invalid or unenforceable
provision, and there shall be added automatically as part of this Agreement a
provision as similar in its terms to such illegal, invalid or unenforceable
provision as may be possible and be legal, valid and enforceable.

                                       5

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.

                                            LUMINEX CORPORATION

                                            By:
                                                --------------------------------

                                            EXECUTIVE

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

                                            David S. Reiter, individually

                                       6