<PAGE>

                                                                   Exhibit 10.11

                                                                    Ref 62000909

                              EMPLOYMENT AGREEMENT

     This EMPLOYMENT AGREEMENT (the "Employment Agreement")dated the lst day of
January, 2000 ("Effective Date") is between INFORMEDIX, INC., a Delaware
corporation (the "Corporation") with offices at 5880 Hubbard Dr., Rockville, MD
20852-4821 and Bruce A. Kehr, M.D. residing at 9429 Holbrook Lane, Potomac,
Maryland, 20854 ("Employee").

                                   WITNESSETH:

     WHEREAS, the Corporation desires to employ the Employee as its Chairman of
the Board of Directors ("Chairman") and Chief Executive Officer ("CEO"); and,

     WHEREAS, the Employee desires to accept such employment upon the terms and
conditions set forth in this Employment Agreement.

     NOW, THEREFORE, in consideration of the mutual covenants and obligations
hereinafter set forth, and the consideration, the receipt and sufficiency of
which is hereby acknowledged, the Corporation and Employee hereto agree as
follows.

1.   Employment.

     A.   The Corporation hereby employs the Employee, and the Employee hereby
          accepts the employment by the Corporation as Chairman and CEO of the
          Corporation upon the terms and conditions set forth in this Employment
          Agreement.

     B.   Employee will report to the Board of Directors of the Corporation (the
          "Board').

     C.   The Employee will perform the Employee's duties under this Employment
          Agreement at the Corporation's offices at 5880 Hubbard Dr., Rockville,
          MD 20852-4821.

2.   Term.

     A.   The term of this Employee's employment under this Agreement shall
          commence on January 1, 2000 and end on the effective date of
          termination of employment (the "Term of Employment").

     B.   Employee shall actively assume the Employee's position on or before
          January 1, 2000 and payment of salary and other payments shall begin
          upon that date.

     C.   The Corporation may terminate this Employment Agreement only by a
          two-thirds (2/3) vote by the Board then serving, with Employee not
          voting and not being counted as a director for purposes of such vote.

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 2 of 15 Pages


     D.   In the event that a successor CEO is selected, Employee shall
          immediately cease to be the CEO, but shall remain an Executive Vice
          President of the Corporation, with a minimum salary of $200,000 per
          annum. Employee shall also remain as Chairman for the remainder of
          Employee's term as a director, unless two-thirds (2/3) of the
          directors of the Corporation then serving shall vote to remove
          Employee as Chairman, with Employee not voting and not being counted
          as a director for purposes of such vote. All other provisions of this
          Employment Agreement shall remain in full force and effect and be
          binding upon the Corporation and Employee, except for the requirements
          of Section 3. B., which may be modified by majority vote of the Board.

3.   Duties.

     A.   The Employee shall perform such duties and services and shall be
          allocated such resources, consistent with the Employee's position, as
          may be assigned to him from time to time by the Board. In furtherance
          of the foregoing, the Employee hereby agrees to perform well and
          faithfully such duties and responsibilities.

     B.   In his role as CEO, Employee shall perform the following:

          (1)  Primary responsibility for the oversight and coordination of all
               of the Corporation's operations including, but not limited to,
               Research and Development, Manufacturing, Software, Internet,
               Sales and Marketing, Distribution, Strategic Partner Relations,
               and Customer Relations.

          (2)  Direct, coordinate, support and monitor the activities of all of
               the officers and employees of the Corporation.

          (3)  Develop and implement, in conjunction with the President,
               Executive Committee of the Board of Directors ("EC"), and Board,
               a business development program focused on negotiating and closing
               corporate strategic alliances, supply chain relationships, and
               distribution alliances.

          (4)  Chief inventor.

          (5)  Primary responsibility to develop and implement the current
               InforMedix business plan and any revised business plans created.

          (6)  Primary responsibility for raising capital on behalf of the
               Corporation.

     C.   In his role as Chairman, the Employee shall perform the following:

          (1)  Create, update and communicate the Corporation Mission Statement.

          (2)  Assist and advise the CEO, if different than Employee, in
               research and development, business development, corporate
               strategic partnership


<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 3 of 15 Pages


               development and maintenance, employee relations and other aspects
               of corporate operations.

          (3)  Chief inventor.

          (4)  Assist in raising capital for the Corporation.

          (5)  Chair the meetings of the Corporation's Board of Directors.

          (6)  Assist in recruitment of additional Directors.

     D.   Employee shall be subject to the terms and conditions of employment
          set forth in the Corporation's Policies and Procedures Manual, which
          may be revised unilaterally by the Corporation at any time. To the
          extent that there are any inconsistencies between that Manual and this
          Employment Agreement, the terms of this Employment Agreement shall
          control.

4.   Time to be Devoted to Employment.

     A.   Except as otherwise provided in this Section 4, during the Term of
          Employment, the Employee shall devote the Employee's-full time and
          energy to the business of the Corporation.

     B.   Employee shall not be entitled to receive any additional remuneration
          for work outside the Employee's normal hours.

     C.   Employee shall be entitled to a total of twenty-six (26) days of
          annual paid time off ("Annual PTO"), as defined below, during this
          Employment Agreement. Annual PTO days not used by the Employee during
          one twelve month period may be accrued and used during the next twelve
          (12)months. Annual PTO includes the following time taken off from work
          for the Corporation for any of the following reasons: vacations;
          national holidays; illness; personal use; or any other purpose not
          otherwise restricted or prohibited by this Employment Agreement.

     D.   During the Term of Employment, the Employee shall not be engaged in
          any other business activity without the express written consent of the
          Corporation, `except as set forth below. Specifically excluded from
          the restrictions below is Employee's service on the Board of Directors
          and ownership of the securities of both: Contemporary Psychiatric
          Services, Inc. and Health Resource Management, Inc.

          (1)  Employee may serve on the Board of Directors of other
               corporations that do not compete with, or are not in the same
               general business as the Corporation.

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 4 of 15 Pages


          (2)  Employee may continue to oversee the business operations of
               Contemporary Psychiatric Services, Inc., and may continue to
               treat up to three (3) long-term psychiatric patients, not to
               exceed six (6) hours per week.

     E.   Employee hereby represents that he is not a party to any binding
          relationship or contract, which would be an impediment to entering
          into this Employment Agreement, and that he is permitted to enter into
          this Employment Agreement and perform the obligations under this
          Agreement.

5.   Compensation; Reimbursement.

     A.   During the Term of Employment, the Corporation (or at the
          Corporation's option, any subsidiary or affiliate thereof)shall pay to
          the Employee an annual base salary ("Base Salary")of Two Hundred
          Thousand Dollars ($200,000), plus a stock option bonus calculated as
          set forth below (the "Bonus").

     B.   The Base Salary will be paid in bi-weekly installments, as follows:

          (1)  if, in the opinion of the Executive Committee of the Board (the
               "EC"), the Corporation is able to pay the Base Salary in cash or
               cash equivalents, then, at the option of the Employee, Employee
               shall be paid either in cash or cash equivalents, or paid in
               options to purchase shares of the Corporation's common stock, in
               accordance with the method set forth in Subsection 5.B.(2) below;
               or

          (2)  if, in the opinion of the EC, the Corporation is unable to pay
               the Base Salary in cash or cash equivalents, then Employee shall
               be paid in options to purchase shares of the Corporation's common
               stock ("Base Salary Options").

     C.   The exercise price for Base Salary Options shall be One Dollar ($1.00)
          per each share of common stock covered by the option grant. Base
          Salary Options shall be granted on the last day of each bi-weekly
          period, as earned, and shall be vested and non-forfeitable upon grant.
          Base Salary Options first shall become exercisable one (1)year from
          the date of grant. The number of shares of common stock to be covered
          by such options each year shall equal one hundred and fifty percent
          (150%) of the Base Salary divided by ten (10). Base Salary Options
          shall be treated as nonqualified stock options as defined in the
          Corporation's Omnibus Stock Plan ("Plan").

     D.   The Bonus shall be paid in stock options, as provided for in Section 6
          below. All of the Bonus options shall be granted immediately upon the
          execution and delivery of this Employment Agreement. The exercise
          price for the Bonus options shall be $10 (ten dollars) per each share
          of common stock covered by the option grant. Bonus options shall vest
          according to the schedule set forth in Section 6

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 5 of 15 Pages


          below, reflecting increases in the total annual revenues from all
          sources earned by the Corporation ("Revenues").

     E.   Each installment of the Bonus shall vest on January 1 following the
          fiscal year in which the Corporation achieves specified levels of
          accrued Revenues as determined by the Board of Directors under
          Generally Accepted Accounting Principles.

6.   Performance-Based Stock Options and Vesting

     A.   The Corporation grants to the Employee bonus options with respect to
          145,020 shares of the Corporation's common stock. Bonus options shall
          be treated as incentive stock options as defined in the Corporation's
          Plan. The exercise price with respect to the options granted under
          this Agreement ("the Option Shares") shall be $1.0 per share of common
          stock.

     B.   The Option Shares shall vest when the annual revenues earned by the
          Corporation ("Revenues"), reach or exceed the targets below,
          determined at the end of the Corporation's fiscal year as provided for
          in Subsection 5. D. At each revenue level below, 24,170 of the Option
          Shares shall vest with Employee.

          (1) $500,000

          (2) $1,000,000

          (3) $2,000,000

          (4) $3,000,000

          (5) $5,000,000

          (6) $7,000,000

     C.   If the Employee ceases to be an employee or director of the
          Corporation, no Option Shares shall vest thereafter, except as
          specifically provided in Subsection 8.C. below.

7.   Review of Base Salary; Additional Bonus; Benefits Program.

     A.   The Base Salary shall be reviewed annually and be subject to increase
          at the option and in the sole discretion of the Board. The base salary
          shall be decreased only if there are across-the-board salary
          reductions applicable to all senior management employees of the
          Corporation.

     B.   At the close of the Corporation's fiscal year, Employee may be
          entitled to an additional bonus, as determined by the Board in its
          sole discretion, based on Employee's performance.

     C.   During the Term of Employment, when, and if, the Corporation creates
          any benefits programs for employees, the Employee shall be entitled to
          participate in those programs as they are added. Those programs may
          include: family medical

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 6 of 15 Pages


          and dental coverage; short and long term disability coverage; 401(k)or
          similar plans; and such other benefits as are made available from time
          to time to the employees of the Corporation. When, and if, the
          Corporation creates a benefits program for employees, the Corporation
          may unilaterally modify the benefits offered to Employee of the
          Corporation, and w-ill notify the Employee in writing as to any such
          change.

     D.   The Corporation shall reimburse Employee,, in accordance with its
          general practices and procedures from time to time for other employees
          of the Corporation, for all reasonable and necessary travel expenses,
          disbursement and other reasonable and necessary incidental expenses
          incurred by Employee for or on behalf of the Corporation in the
          performance of the Employee's duties under this Employment Agreement,
          upon presentation by the Employee to the Corporation of appropriate
          vouchers and/or other expense reports, and otherwise in accordance
          with its general practices and procedures as established from time to
          time by the Corporation.

     E.   The Option Shares shall accelerate and become one hundred percent
          vested upon the occurrence of any of the following conditions
          (collectively referred to as the "Accelerated Vesting Conditions"):

          (1)  upon the dissolution or liquidation of the Company; or

          (2)  upon a reorganization, merger, or consolidation of the Company as
               a result of which the outstanding securities of the class of
               securities then subject to the Options are changed into or
               exchanged for cash or property or securities not of the Company's
               issue; or

          (3)  any combination thereof;

          (4)  upon a sale of substantially all of the property of the Company
               to, or the acquisition of the shares of common stock then
               outstanding by, another Corporation or person; or

          (5)  a Termination without Cause, as defined below-, of the Employee.

8.   Effect of Termination of Employment.

     A.   For purposes of this Section of the Employment Agreement, the
          following definitions apply.

          (1)  "Termination Without Cause" is defined as any termination,
               including a "Voluntary Termination", "Death, or Disability
               Termination", and a "Constructive Termination", but excluding a
               "Termination With Cause", all as defined below.
<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 7 of 15 Pages


          (2)  "Termination With Cause" is defined as a termination initiated by
               the Corporation due to:

               (a)  the Employee's misconduct with respect to the business
                    and/or affairs of the Corporation or any subsidiary or
                    affiliate thereof, which action materially and adversely
                    affects the business and/or affairs of the Corporation or
                    any subsidiary or affiliate thereof; and/or

               (b)  the Employee failing, in any material respect, to observe
                    and perform the Employee's obligations and duties under this
                    Employment Agreement, after being given written notice by
                    the Board of an alleged failure to perform and a reasonable
                    opportunity to correct that failure; and/or

               (c)  the commission by the Employee of an act involving
                    embezzlement or fraud, or commission or conviction of a
                    felony.

          (3)  "Voluntary termination" is defined as a termination due to a
               resignation of employment by Employee, including a voluntary
               retirement by the Employee, unless the resignation constitutes a
               "Constructive Termination", as defined below.

          (4)  "Constructive Termination" shall occur w-hen Employee resigns
               within six (6)months of any one or more of the following events:

               (a)  any reduction in the level of Base Salary, except for
                    across-the-board salary reductions applicable to all
                    management employees of the Employer; and/or

               (b)  a relocation of the Employee's place of employment to a
                    location more than sixty (60)miles from 5880 Hubbard Drive,
                    Rockville, Maryland 20852-4821.

               (c)  For purposes of the definition of "Constructive
                    Termination", the hiring of a new CEO by the Corporation
                    will not be considered a Constructive Termination. If a new
                    CEO is hired by the Corporation, Employee and Corporation
                    agree that Employee shall become an Executive Vice President
                    of the Corporation, at a minimum salary level of $200,000,
                    with all other provisions of this Employment Agreement
                    binding on Employee and Corporation except for the
                    provisions of Sections 3.B., which may be modified by
                    majority vote of the Board.

          (5)  "Death or Disability Termination" is defined as the following
               occurrences:

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 8 of 15 Pages


               (a)  If the Employee dies during the Term of Employment, the
                    Employee's employment under this Employment Agreement shall
                    be deemed to cease as of the date of the Employee's death;
                    or,

               (b)  the Corporation may terminate Employee's employment upon the
                    Employee's failure, by reason of any physical or mental
                    impairment, to perform the Employee's normal duties under
                    this Employment Agreement for a period of ninety
                    (90)consecutive days or for ninety (90)days during any
                    consecutive 365-day period, with such disability termination
                    to become effective at the end of the applicable ninety (90)
                    day period.

               (c)  In the event of Corporation terminating Employee's
                    Employment for Disability Termination, Employee shall resign
                    as CEO, and shall still be entitled to serve as Chairman of
                    the Board of Corporation, if serving in that position at the
                    time of Disability Termination, unless Employee fails to
                    perform the duties of Chairman for a 365 day period.

     B.   Termination Without Cause.

     Upon the termination of the Employee's employment under this Employment
     Agreement pursuant to Termination Without Cause, neither the Employee nor
     the Employee's beneficiary or estate shall have any further rights or
     claims against the Corporation under this Employment Agreement, except to
     receive the following:

          (1)  the unpaid portion of the Base Salary computed on a pro rata
               basis to the date of such termination; and

          (2)  reimbursement for any expenses for which the Employee shall not
               have already been reimbursed;

          (3)  payment of all unused vacation , time accrued through the date of
               termination; and

          (4)  Base Salary for twelve (12)months.

     C.   Upon a Termination Without Cause, a Constructive Termination, and/or
          Death or Disability Termination, Employee shall be entitled to the
          vesting of the Option Shares for the year of such termination, under
          the terms and conditions set forth in Section 6. above, the
          Performance-Based Stock Options and Vesting Section of this Employment
          Agreement.

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                            Page 9 of 15 Pages


     D.   Termination With Cause.

     Upon the termination of the Employee's employment under this Employment
     Agreement pursuant to a Termination With Cause, as defined above, neither
     the Employee nor the Employee's beneficiary or estate shall have any
     further rights or claims against the Corporation under this Employment
     Agreement, except -

          (1)  to receive the following:

               (a)  the unpaid portion of the Base Salary computed on a pro rata
                    basis to the date of termination; and

               (b)  reimbursement for any expenses for which the Employee shall
                    not have theretofore been reimbursed; and

               (c)  payment of all unused vacation time accrued through the date
                    of termination; and

          (2)  less the following:

               (a)  all amounts owing to the Corporation; and

               (b)  the total value of any possible misappropriations from the
                    Corporation.

          (3)  In addition, on the date of a Termination With Cause:

               (a)  all unvested options shall immediately terminate; and

               (b)  all unvested warrants and other unvested rights granted to
                    the Employee to purchase or otherwise receive stock of the
                    Corporation, shall immediately terminate; and

               (c)  all vested but unexercised options shall become immediately
                    exercisable, and Employee shall have the right to exercise
                    all, or a portion of, such vested but unexercised options,
                    subject to the following terms and conditions:

                    [1]  the Employee shall have twenty (20)days from the date
                         of a Termination With Cause to give written notice to
                         the Corporation of the Employee's intention to exercise
                         all, or a portion of, such vested but unexercised
                         options; and

                    [2]  within forty (40)days from the date of a Termination
                         With Cause, Employee must:


<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 10 of 15 Pages


                         [a]  exercise all, or a portion of, such vested but
                              unexercised options; and

                         [b]  make payment in full to the Corporation in cash,
                              cash equivalents, or other immediately available
                              funds; and

                         [c]  otherwise complete the entire settlement process
                              for the exercise of all, or a portion of, such
                              vested but unexercised options.

     E.   Notwithstanding anything to the contrary in this Effect of Termination
          of Employment Section of this Employment Agreement, if any other
          officer or employee of the Corporation receives more favorable
          termination provisions than contained in this Effect of Termination of
          Employment Section of this Employment Agreement, then those more
          favorable termination provisions shall apply.

9.   Corporation's Rights to Intellectual Property of Employee.

     A.   The Employee shall promptly disclose, grant and assign ownership to
          the Corporation for its sole use and benefit, any and all inventions,
          improvements, information, copyrights, trademarks, service marks,
          intellectual property, and suggestions (whether patentable or not),
          for devices and/or products that hold medication, and/or devices,
          products, and/or programs that provide medication, whose function is
          prompting for, and ascertaining medication compliance, and/or are
          portable technologies that are used by patients to capture data on
          medication compliance and/or health status, which Employee may
          develop, acquire, conceive or reduce to practice while employed by the
          Corporation (whether or not during usual working hours), together with
          all patent applications, letters patent, copyrights, trade-marks,
          service marks, and other intellectual property (collectively
          "Intellectual Property"), and reissues thereof that may at any time be
          granted for or upon any such invention, improvement or information.

     B.   In connection therewith, the Employee shall:

          (1)  without charge, but at the expense of the Corporation, promptly
               at all times hereafter execute and deliver such applications,
               assignments, descriptions and other instruments as may be
               reasonably necessary or proper in the opinion of the Corporation
               to vest title to any such inventions, improvements, technical
               information, patent applications, patents, copyrights or
               reissues, and/or other Intellectual Property thereof in the
               Corporation and enable it to obtain and maintain the entire right
               and title thereto throughout the world; and

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 11 of 15 Pages


          (2)  render to. the Corporation at its expense (including
               reimbursement to the Employee of reasonable out-of-pocket
               expenses incurred by the Employee and a reasonable payment for
               the Employee's time involved in case he is not then in its
               employ) all such assistance as it may reasonably require in the
               prosecution of applications for said patents, copyrights or
               reissues thereof, in the prosecution or defense of interferences
               which may be declared involving any said applications, patents or
               copyrights and in any litigation in which the Corporation may be
               involved relating to any such patents, inventions, improvements
               or technical information.

          (3)  As a pre-condition to the effectiveness of this Employment
               Agreement, Employee will sign the Corporation's Confidentiality,
               Non-Competition and Invention Assignment Agreements. If there is
               a conflict between such agreements and this Employment Agreement,
               this Employment Agreement shall prevail including the Protection
               of Information Section of this Employment Agreement.

10.   Protection of Information.

          A.   Employee hereby covenants with Corporation that, throughout the
               term of the Employee's employment by Corporation, Employee will
               serve Corporation's best interests loyally and diligently.
               Throughout the course of employment by the Corporation and
               thereafter, Employee w-ill not disclose or provide to any person,
               firm, corporation or entity (except when authorized by
               Corporation) any confidential information, materials, sales
               information, marketing plans or commercial activities; which are
               owned by the Corporation or which come into the possession of the
               Corporation from a third party under an obligation of
               confidentiality, including without limitation, information
               relating to trade secrets, business methods, products processes,
               procedures, development or experimental projects, suppliers,
               customers lists or the needs of customers or prospective
               customers, clients, etc. (collectively "Confidential
               Information"), which Confidential Information, comes into
               Employee's possession or knowledge during the Term of Employment,
               and he will not use such Confidential Information for the
               Employee's own purpose or for the purpose of any person, film,
               corporation or entity, other than the Corporation.

          B.   The provisions of this Section of the Employment Agreement shall
               not apply to the following Confidential Information:

               (1)  Confidential Information which at the time of disclosure is
                    already in the public domain;

               (2)  Confidential Information which subsequently becomes part of
                    the public domain through no fault of the Employee;

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 12 of 15 Pages


               (3)  Confidential Information which becomes known to the Employee
                    through a third party who is under no obligation of
                    confidentiality to the Corporation; and

               (4)  Confidential Information which is required to be disclosed
                    by law or by judicial or administrative proceedings.

11.  Non-Compete.

     A.   Employee agrees that during the Term of Employment and for a period of
          twenty-four (24) months following any termination of the Employee set
          forth in the Effect of Termination of Employment Section of this
          Employment Agreement, Employee agrees not to enter the employ of,
          directly or indirectly, or serve as an officer, director, employee,
          consultant, owner, partner, stockholder, agent, or in any other
          capacity, of or for, any person, company, or entity that owns,
          controls, manufactures, sells, leases, markets, licenses, and/or
          distributes devices and/or products that hold medication, and/or
          devices, products, and/or programs that provide medication: whose
          function is prompting for, and ascertaining medication compliance;
          and/or are portable technologies that are used by patients to capture
          data on medication compliance and/or health status.

     B.   In the unlikely event that Employee breaches Employee's obligations as
          described in this Section, both parties agree that irreparable harm
          will have been caused to InforMedix. Therefore, in the event of a
          determination of such a breach by a court of competent jurisdiction,
          Employee hereby agrees that InforMedix shall be entitled to temporary
          or permanent injunctive relief, and to a judgment for damages caused
          by the breach, and any other equitable or legal remedies provided by
          applicable law or at equity.

12.  Notices.

     A.   Notices and other communications under this Agreement shall be in
          writing and shall be delivered personally or sent by nationally
          recognized overnight air courier or first class certified or
          registered mail, return receipt requested and postage prepaid,
          addressed as follows unless the party specifies a new address in
          writing:

          If to the Employee:       Bruce A. Kehr, M. D.
                                    9429 Holbrook Lane
                                    Potomac, Maryland 20854

          If to the Corporation:    President
                                    InforMedix, Inc.
                                    5880 Hubbard Drive
                                    Rockville, MD 20852-4821

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 13 of 15 Pages


          With a copy to:           General Counsel
                                    InforMedix, Inc.
                                    5880 Hubbard Drive
                                    Rockville, MD 20852-4821

     B.   All notices and other communication given to any party to this
          Employment Agreement in accordance with the provisions of this
          Employment Agreement shall be deemed to have given to the date of
          delivery if personally delivered; on the business day after the date
          when sent if sent by air courier; and on the third business day after
          the date w-hen sent if sent by mail, in each case addressed to such
          party as provided in this Section or in accordance with the latest
          unrevoked direction from such party.

13.  General Provisions

     A.   This Employment Agreement contains the entire understanding between
          the parties and supersedes any prior written or oral agreements,
          understandings, term sheets, or other between them, with the exception
          of the specific agreements between the Corporation and the Employee
          specifically referenced in this Employment Agreement. This Employment
          Agreement shall not be modified or waived except by written instrument
          signed by the parties.

     B.   This Employment Agreement and any or all terms hereof may not be
          changed, waived, discharged, or terminated orally, `but only by way of
          an instrument in writing signed by the parties.

     C.   There are no collective bargaining agreements affecting Employee's
          employment.

     D.   Employee acknowledges that this Employment Agreement was made by the
          parties in Maryland and shall be governed and enforced in accordance
          with the laws of Maryland. without reference to the conflicts of laws
          of the State of Maryland or any other jurisdiction. Employee
          acknowledges that the state and federal courts of Maryland shall be
          the exclusive for a for the resolution of any disputes concerning this
          Employment Agreement or concerning Employee's employment with the
          Company and that he agrees to submit to the jurisdiction of those
          courts.

     E.   Employee acknowledges that, if he breaches any provision of this
          Employment Agreement, the Company will be irreparably harmed, that
          monetary damages alone may not be sufficient to adequately protect the
          Company from such breach, and that, in addition to any other remedy,
          the Company shall be entitled to recover all expenses incurred in
          enforcing these provisions, including attorneys' fees and court costs,
          and to a preliminary and permanent injunction enjoining such breach.

     F.   If any portion of this Employment Agreement shall be found to be
          invalid or contrary to public policy, the same may be modified or
          stricken by a Court of

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 14 of 15 Pages


          competent jurisdiction, to the extent necessary to allow-the Court to
          enforce such provisions in a manner which is as consistent with the
          original intent of the provisions as possible. The striking or
          modification by the Court of any provision shall not have the effect
          of invalidating the Employment Agreement as a whole. In addition, if
          any valid federal or state law or final determination of any
          administrative agency or court of competent jurisdiction affects any
          provision of this Employment Agreement, then the provision or
          provisions so affected shall automatically be modified to conform to
          the law-or determination and otherwise this Employment Agreement shall
          continue in full force and effect.

     G.   The section headings contained in this Employment Agreement are for
          reference purposes only and shall not affect in any way the meaning or
          interpretation of this Employment Agreement.

     H.   This Employment Agreement is personal in its nature and the parties
          hereto shall not, without the consent of the other, assign or transfer
          this Employment Agreement or any rights or obligations under this
          Agreement; provided, however, that the provisions hereof shall inure
          to the benefit of, and be binding upon the parties and their
          respective executors, administrators, personal representatives, heirs,
          assigns and successors in interest. And each successor of the
          Corporation, whether by merger, consolidation, transfer of all or
          substantially all assets, or otherwise and the heirs and legal
          representatives of the Employee.

     I.   The obligations of the General Provisions Section, the Corporation's
          Rights to Intellectual Property of the Employee Section, and the
          Protection of Information Section shall survive the termination or
          expiration of this Employment Agreement.

     J.   Both parties have read the foregoing Employment Agreement in its
          entirety and voluntarily agree to each of its terms and conditions
          with full knowledge of such terms and conditions.

     K.   The Corporation and Employee acknowledge and agree that any and all
          grants of stock options or restricted stock under this Agreement are
          made pursuant to the authorization and terms and conditions of the
          Corporation's Omnibus Stock Plan and Restricted Stock Agreement which
          shall be controlling except where expressly modified in this
          Employment Agreement.

<PAGE>

Employment Agreement Between                                      Ref: 620000909
InforMedix and Bruce A. Kehr, M.D.                           Page 15 of 15 Pages


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

INFORMEDIX, INC. ("Corporation")


By: /s/ Robert H. Benson                          February 12, 2001
    -----------------------------------           -----------------------------
    Robert H. Benson, Ph.D.                          Date
    President

EMPLOYEE ("Employee")


By: /s/ Bruce Kehr, M.D.                          February 12, 2001
    -----------------------------------           -----------------------------
    Bruce Kehr, M.D.                                 Date


<PAGE>

                                                                 Ref: 2001031901

                    AMENDMENT #l TO THE EMPLOYMENT AGREEMENT
                  BETWEEN INFORMEDIX AND BRUCE A. KEHR, M. D.

     This Amendment #1 to the Employment Agreement Between InforMedix and Bruce
A. Kehr, M.D. (the "Amendment #l") dated as of the 5th day of February, 2001 and
effective on January 1, 2001 (the "Effective Date") is between InforMedix, Inc.,
a Delaware corporation ("Employer" or the "Corporation") with offices at 5880
Hubbard Dr., Rockville, MD 20852-4821 and Bruce A. Kehr, M.D. residing at 9429
Holbrook Lane, Potomac, Maryland, 20854 ("Employee").

                                   WITNESSETH:

     WHEREAS, Employer has previously employed the Employee as its Chairman of
the Board of Directors ("Chairman") and Chief Executive Officer (" CEO")under
and pursuant to an Employment Agreement with (Employee dated as of January 1,
2000 (the "Employment Agreement"); and

     WHEREAS, both the Employer and the Employee wish to amend the Employment
Agreement and have the Employee continue employment with the Employer upon the
terms and conditions set forth in this Amendment #1.

     NOW, THEREFORE, in consideration of the mutual covenants and obligations
hereinafter set forth, and the consideration, the receipt and sufficiency of
which is hereby acknowledged, Employer and Employee agree as follows.

1.  Effect of this Amendment #l.

     A.   All of the terms and conditions set forth in this Amendment #1 shall:

          (1)  be effective as of the Effective Date, unless a different date is
               specifically referred to in this Amendment #1; and

          (2)  supersede and replace those sections of the Employment Agreement,
               which they specifically change.

     B.   All other terms and conditions not specifically changed by this
          Amendment #1 shall remain in full force and effect in accordance with
          the terms and conditions of the Employment Agreement.

2.  Compensation; Reimbursement.

     Section 4 of the Employment Agreement, entitled Compensation;
     Reimbursement., is replaced in its entirety by this Section 2 of this
     Amendment #1, entitled Compensation; Reimbursement.

<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 2 of 9 Pages


     A.   Commencing on the Effective Date, Employer (or at Employer's option,
          any subsidiary or affiliate thereof)shall pay to the Employee an
          annual salary of $200,000.00 (two hundred thousand dollars), with a
          minimum of $40,000 (forty thousand dollars)to be paid in cash (the
          "Salary"). The Salary will be paid in biweekly installments.

     B.   If it is determined by the Executive Committee of the Board of
          Directors of Employer (the "Executive Committee")that there are
          insufficient funds to pay any portion of the Salary in cash, then the
          portion of the Salary not paid in cash, up to the full amount of the
          Salary, will be paid in the form of non-qualified stock options of
          Employer, as defined in Employer's Omnibus Stock Plan ("Plan"), with
          an exercise price per share of $1.00 (one dollar), which vest
          immediately when granted, and become exercisable one year after the
          date of each grant (the "Salary Options").

          (1)  The number of shares subject to the Salary Options (the "Salary
               Option Share(s)") will be determined by dividing the amount of
               the Salary not to be paid in cash, by the per share price of
               InforMedix Common Stock on the date of grant of the Salary
               Options (on the Effective Date of this Amendment #1 it is $10.00
               [ten dollars] per share), less the $1.00 (one dollar) exercise
               price, or $9.00 (nine dollars).

          (2)  For example, were $160,000.00 (one hundred sixty thousand
               dollars) of Salary not to be paid in cash, then, Salary Options
               to purchase 17,777.777 (seventeen thousand, seven hundred
               seventy-seven point seven seven seven) Salary Option Shares would
               be granted.

          (3)  If Employer sells, or otherwise cause to be issued, any shares of
               InforMedix Common Stock, or other instruments convertible into
               InforMedix Common Stock, for less than $10.00 (Ten Dollars) per
               share (the "Revised Price Per Share"), then Employer shall issue
               to Purchaser, additional Salary Option Shares so that the Salary
               Option Shares equal the amount of the Salary not to be paid in
               cash, divided by the Revised Price Per Share.

     C.   Employer, at the election of the Board of Directors, may exercise a
          call on some or all of the issued, but unexercised Salary Options held
          by Employee as of the date of such call (a "Call"), and purchase those
          Salary Options from Employee within 60 (sixty) days of a Call, at a
          purchase price per Salary Option Share equal to the then-effective
          market price per share of InforMedix Common Stock, but in no event
          less than $10.00 (Ten Dollars)per share, less the $1.00 exercise
          price, and subject to the terms and conditions set forth below.

          (1)  At any time during a calendar year, Employer may exercise a Call
               to purchase some or all of the unexercised Salary Options earned
               by


<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 3 of 9 Pages


               Employee at any time in that calendar year, up to and including
               the date of the exercise of a Call.

          (2)  Up to and including March 31St of any year, Employer may exercise
               a Call to purchase some or all of the unexercised Salary Options
               earned by Employee at any time in the preceding calendar year.

          (3)  Nothing in this Subsection of the Employment Agreement shall
               authorize or permit Employer to purchase InforMedix Common Stock
               owned by Employee which had previously been subject to Salary
               Options of Employee, and which had previously been exercised by
               Employee and converted to InforMedix Common Stock.

3.  Performance-Based Stock Options and Vesting.

     Section 6 of the Employment Agreement, entitled Performance-Based Stock
     Options and Vesting., is replaced in. its entirety by this Section 3 of
     this Amendment #l, entitled Performance-Based Stock Options and Vesting.

     A.   Employer hereby issues to the Employee upon the Effective Date of this
          Amendment #l, 35,001 (thirty-five thousand and one) performance-based
          stock options to purchase InforMedix Common Stock, in the form of
          non-qualified, incentive stock options of Employer, as defined in the
          Plan, with an exercise price of $10.00 (ten dollars) per share, which
          shall vest and be exercisable according to the schedule below,
          exercisable upon the vesting date of each grant, and otherwise subject
          to the terms and conditions of this Section 3. of Amendment #l (the
          "PB Options").

     B.   The PB Options to purchase InforMedix Common Stock will vest based
          upon the attainment of pre-determined and pre-assigned performance
          targets, as determined by the Board of Directors.

     C.   The PB Options will be for a three-year period, with one-third of the
          shares subject to the PB Options (the "PB Option Share(s)"), vesting
          in each of the three years of each grant (a "Grant").

     D.   The number of PB Option Shares subject to the PB Options for each
          Grant, will be 11,667, which will be eligible for vesting in each of
          the three (3)years of each Grant.

     E.   After the date that the Employee ceases to be an employee or director
          of Employer, no PB Options or PB Option Shares shall vest, except as
          specifically provided in Section 5. of this Amendment #1.

<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 4 of 9 Pages


4.  Acceleration of Vesting of Salary Options and PB Options.

     Subsection 7.E. of the Employment Agreement is hereby superseded by the
     following, which shall replace that Subsection in its entirety.

     A.   The Salary Options and the PB Options shall accelerate and become one
          hundred percent vested and immediately exercisable, upon the
          occurrence of any of the following conditions (collectively referred
          to as the "Accelerated Vesting Conditions"):

          (1)  upon the dissolution or liquidation of the Company; or

          (2)  upon a reorganization, merger, or consolidation of the Company as
               a result of which the outstanding securities of the class of
               securities then subject to the Options are changed into or
               exchanged for cash or property or securities not of the Company's
               issue; or

          (3)  any combination thereof;

          (4)  upon a sale of substantially all of the property of the Company
               to, or the acquisition of a majority of the shares of InforMedix
               Common Stock then outstanding by, another Corporation or person;
               or

          (5)  a Termination without Cause of the Employee.

5.  Adjustment of Agreement and Amendment #1 Options.

     A new Section 7A is added to the Employment Agreement as follows.

     7A.  Adjustment of Agreement and Amendment #l Options.

     A.   In the event that InforMedix issues shares of its InforMedix Common
          Stock or rights, options or warrants for, or securities convertible or
          exchangeable into InforMedix Common Stock, to any person or entity
          other than Employee (collectively referred to as a "Third Party"),
          entitling such Third Party to subscribe for or purchase shares of
          InforMedix Common Stock at a price per share that is lower at the
          record date than the exercise price of the Base Salary Options and
          Option Shares issued under the Employment Agreement, and Salary
          Options and/or the PB Options issued under this Amendment #l
          (collectively referred to as the "Agreement and Amendment #1 Options"
          and such event referred to as a "Dilutive Event"), the exercise price
          of the Agreement and Amendment #1 Options shall be reduced to the
          exercise price or share price of the Dilutive Event.

          (1)  The new number of shares of InforMedix Common Stock purchasable
               upon the exercise of the Agreement and Amendment #1 Options shall
               be determined by multiplying the old number of shares purchasable
               by the


<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 5 of 9 Pages


               Agreement and Amendment #1 Options, by the old exercise price of
               the Agreement and Amendment #l Options. divided by the new
               exercise price of the Agreement and Amendment #1 Options.

          (2)  A Dilutive Event will not be deemed to have occurred for the sale
               or issuance of shares of InforMedix Common Stock (including
               options)to employees of InforMedix, that are approved by the
               Board, or the exercise of currently authorized options and
               warrants.

     B.   The number of Agreement and Amendment #1 Options will be adjusted in
          the same manner as other shares of InforMedix Common Stock issued and
          outstanding -as of the date of the Employment Agreement for the Base
          Salary Options and Option Shares issued under the: Employment
          Agreement, and as of the Effective Date of this Amendment #l for the
          Salary Options and the PB Options issued under this Amendment #1 -- in
          the event of, but not limited to, any of the following, which occur
          and which affect the InforMedix Common Stock: stock split; reverse
          stock split; recapitalization; and/or other adjustment.

     C.   For as long as the stock of InforMedix has not been registered under
          the United States Federal securities laws and/or state securities
          laws, the Agreement and Amendment #1 Options cannot be transferred or
          sold to another individual, corporation or entity unless permitted
          under the InforMedix Investors Rights Agreement, or agreed upon by a
          majority of the Board, and then only in compliance with applicable
          laws and regulations.

     D.   After the stock of InforMedix has been registered under the United
          States Federal securities laws and/or state securities laws, the
          shares issued as a result of exercise of the Agreement and Amendment
          #l Options may be transferred or sold, but only in compliance with:
          the security laws of the United States of America; the security laws
          of applicable states; all other applicable laws and regulations; any
          other restrictions placed on the transferability of the Agreement and
          Amendment #l Options and agreed to by the Board of Directors of
          InforMedix, including but not limited to those by the underwriter or
          other investment banker with respect to the public offer, sale, and/or
          transfer of the stock of InforMedix, especially those shares of stock
          held by officers, directors, and insiders of InforMedix; and any other
          restrictions placed on the transferability of stock agreed to by the
          directors of InforMedix. Employee further agrees to have a legend
          placed on the certificates for the Agreement and Amendment #1 Options
          reflecting any of the provisions of this Amendment #1 and the
          Agreement.

6.  Termination of Employment.

     Subsections 8.C. and 8.D. of the Employment Agreement are hereby superseded
     by the following, which shall replace those Subsections in their entirety.

<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 6 of 9 Pages


     C.   Upon a Constructive Termination and/or Death or Disability
          Termination, as defined in the Employment Agreement, Employee shall be
          entitled to the vesting of the PB Options only for the year of such
          termination, under the terms and conditions as set forth in this
          Section 3 of this Amendment #l. Nothing in this Subsection shall limit
          or restrict the vesting of the Salary Options and/or Salary Shares for
          Employee.

     D.   Termination With Cause.

          Upon the termination of the Employee's employment under the Employment
          Agreement pursuant to a Termination With Cause, neither the Employee
          nor the Employee's beneficiary or estate shall have any further rights
          or claims against Employer under this Amendment #1, except -

          (1)  to receive the following:

               (a)  the unpaid portion of the Base Salary and any Salary Options
                    computed on a pro rata basis to the date of termination; and

               (b)  reimbursement for any expenses for which the Employee shall
                    not have theretofore been reimbursed; and

               (c)  payment of all unused vacation time accrued through the date
                    of termination; and

          (2)  less the following:

               (a)  all amounts owing to Employer; and

               (b)  the total value of any possible misappropriations from
                    Employer.

          (3)  In addition, on the date of a Termination With Cause:

               (a)  all unvested PB Options shall immediately terminate; and

               (b)  all unvested warrants and other unvested rights granted to
                    the Employee to purchase or otherwise receive stock of
                    Employer, shall immediately terminate; and

               (c)  all vested but unexercised Salary Options and PB Options
                    shall become immediately exercisable, and Employee shall
                    have the right to exercise all, or a portion of, such vested
                    but unexercised Salary Options and PB Options, subject to
                    the following terms and conditions:

<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 7 of 9 Pages


                    [1]  the Employee shall have twenty (20) days from the date
                         of a Termination With Cause to give written notice to
                         Employer of the Employee's intention to exercise all,
                         or a portion of, such vested but unexercised Salary
                         Options and PB Options; and

                    [2]  within forty (40)days from the date of a Termination
                         With Cause, Employee must:

                         [a]  exercise all, or a portion of, such vested but
                              unexercised Salary Options and PB Options; and

                         [b]  make payment in full to Employer in cash, cash
                              equivalents, or other immediately available funds
                              for the exercise of the Salary Options and PB
                              Options; and

                         [c]  otherwise complete the entire settlement process
                              for the exercise of all, or a portion of, such
                              vested but unexercised Salary Options and PB
                              Options.

                    [3]  Any portion of vested but unexercised Salary Options
                         and PB Options, which are not exercised under and
                         pursuant to the terms and conditions of this Subsection
                         B.(3)(c)shall immediately terminate.

7.  General Provisions.

     A.   This Amendment #l contains the entire understanding between the
          parties and supersedes any prior written or oral agreements,
          understandings, term sheets, or other between them, with respect to
          the matters covered by this Amendment #l.

     B.   This Amendment #1 and any or all terms hereof may not be changed,
          waived, discharged, or terminated orally, but only by way of an
          instrument in writing signed by both Employer and Employee.

     C.   Employee acknowledges that this Amendment #l was made by the parties
          in Maryland and shall be governed and enforced in accordance with the
          laws of Maryland, without reference to the conflicts of laws of the
          State of Maryland or any other jurisdiction. Employee acknowledges
          that the state and federal courts of Maryland shall be the exclusive
          for a for the resolution of any disputes concerning this Amendment #1
          or concerning Employee's employment with the Company and that he
          agrees to submit to the jurisdiction of those courts.

     D.   Employee acknowledges that, if Employee breaches any provision of this
          Amendment #1, the Company will be irreparably harmed, that monetary
          damages


<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 8 of 9 Pages


          alone may not be sufficient to adequately protect the Company from
          such breach, and that, in addition to any other remedy, the Company
          shall be entitled to recover all expenses incurred in enforcing these
          provisions, including attorneys' fees and court costs, and to a
          preliminary and permanent injunction enjoining such breach.

     E.   If any Portion of this Amendment #1 shall be found to be invalid or
          contrary to public policy, the same may be modified or stricken by a
          Court of competent jurisdiction, to the extent necessary to allow the
          Court to enforce such provisions in a manner which is as consistent
          with the original intent of the provisions as possible. The striking
          or modification by the Court of any provision shall not have the
          effect of invalidating the Amendment #1 as a whole. In addition, if
          any valid federal or state law or final determination of any
          administrative agency or court of competent jurisdiction affects any
          provision of this Amendment #1, then the provision or provisions so
          affected shall automatically be modified to conform to the law or
          determination and otherwise this Amendment #1 shall continue in full
          force and effect.

     F.   The section headings contained in this Amendment #1 are for reference
          _________________ and shall not affect in any way the meaning or
          interpretation Amendment ???.

     G.   This Amendment #l is personal in its nature and Employer and Employ
          not, without the consent of the other, assign or transfer this
          Amendment #1 or ____________ obligations under this Employment
          Agreement; provided, however, that the provisions hereof shall inure
          to the benefit of, and be binding upon the parties and their
          respective executors, administrators, personal representatives, heirs,
          assigns and successors in interest, and each successor of Employer,
          whether by merger, consolidation, transfer of all or substantially all
          assets, or otherwise and the heirs and legal representatives of the
          Employee.

     H.   The obligations of the General Provisions Section shall survive the
          termination or expiration of this Amendment #l.

     I.   Both parties have read the foregoing Amendment #1 in its entirety and
          voluntarily agree to each of its terms and conditions with full
          knowledge of such terms and conditions.

     J.   Employer and Employee acknowledge and agree that any and all grants of
          Salary Options and PB Options under this Amendment #1 are made
          pursuant to the authorization and terms and conditions of the
          Employer's Omnibus Stock Plan and Restricted Stock Agreement which
          shall be controlling except where expressly modified in this Amendment
          #l.


<PAGE>

Amendment #1 to Employment Agreement                             Ref: 2001031901
Between InforMedix and Bruce A. Kehr, M.D.                     Page 9 of 9 Pages


           IN WITNESS WHEREOF, the parties have duly executed this Amendment #1
as of the date first above written.

INFORMEDIX, INC. ("Corporation")


By: /s/ Robert H. Benson                          April 2, 2001
    -----------------------------------           -----------------------------
    Robert H. Benson, Ph.D.                          Date
    President

EMPLOYEE ("Employee")


By: /s/ Bruce Kehr, M.D.                          April 2, 2001
    -----------------------------------           -----------------------------
    Bruce Kehr, M.D.                                 Date