Document:

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                             EMPLOYMENT AGREEMENT

     THIS EMPLOYMENT AGREEMENT (the "Agreement") is entered into as of the 28th
day of February, 2000, between METRUM-DATATAPE, INC, a Delaware corporation (the
"Company") and G. DARRELL ROBERTSON , a new employee of the Company (the
"Employee").

     WHEREAS, the Company recognizes that the Employee has made a commitment to
relocate his family from Pennsylvania to California in order to join the Company
and, in order to relieve the Employee of any apprehension concerning employment
security during his period of transition to the Company and, therefore, help
ensure that the Employee remains dedicated and focused on managing the affairs
of the Company, the Company desires to enter into this Agreement with the
Employee; and

     WHEREAS, the Employee: (i) has read and understands the terms and
conditions of this Agreement, and (ii) desires and intends to remain employed by
the Company in the Employee's present position, pursuant to the terms and
conditions hereof, and (iii) further intends to expend the Employee's time,
knowledge, expertise and energy while at work to help the Company build upon and
improve the condition of the business.

     NOW, THEREFORE, in consideration of the premises and mutual covenants
hereinafter set forth and for other good and valuable consideration, the receipt
and adequacy of which are hereby acknowledged, the parties hereto agree as
follows:

I.   EMPLOYMENT PROVISIONS

     1.1. Term.  This Agreement shall be for a term of one-year commencing on
          ----
February 28, 2000 and ending on February 27, 2001, unless the Employee's
employment with the Company ends before that date for any of the reasons which
are specified in Section 1.4 of this Agreement (the "Term").

     1.2. Compensation and Benefits.  As consideration for the services rendered
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by the Employee pursuant to this Agreement, including the agreement to devote
the Employee's full business time and efforts to the performance of the duties
and responsibilities of the Employee's position or positions at the Company, the
Company will provide compensation and benefits to the Employee as follows:

     (a)  Salary.  A base salary of ONE HUNDRED EIGHTY FIVE THOUSAND DOLLARS
          ------
($185,000), which will be dispersed in accordance with the standard payroll
practices of the Company for salaried personnel.  During the Term of this
Agreement, the Company may increase the base salary of the Employee at the
Company's sole discretion.

     (b)  Vacation.  Paid vacation in accordance with the Company's vacation
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schedule policy.

     (c)  Additional Benefits.  Participation (at the expense of the Company,
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where lawful and consistent with Company policy) in any and all employee
retirement, medical, life and disability insurance and other benefits made
available to salaried employees of the Company.

     1.3. Termination of Employment With Payment.  If the Employee is terminated
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by the Company during the Term of this Agreement without cause or for reasons
other than those described in Section 1.4 hereof, the Company will compensate
the Employee as follows:

          (a)  the Company will provide the Employee with pay continuance for a
period of one year from the date of termination. Pay continuance will be
calculated based upon an annual rate which is equal to the Employee's base
salary at the time of termination, less any applicable federal and state taxes,
and will be dispersed in accordance with the standard payroll practices of the
Company for salaried personnel;

          (b)  the Company will make a lump sum payment to the Employee at the
time of termination for all earned and/or accrued vacation days through the date
of termination;
<PAGE>

          (c)  the Company will provide hospitalization and medical insurance
coverage, equal to the coverage provided to active salaried employees of the
Company under its employee health plan (prior to the exercise of COBRA rights),
for a period of one year from the date of termination; and

          (d)  the Company will provide life insurance coverage equal to the
coverage provided by the Company's life insurance plan to active salaried
employees of the Company for a period of one year from the date of termination.

     1.4. Termination of Employment Without Payment.  Should the Employee's
          -----------------------------------------
employment with the Company terminate prior to the expiration of the Term of
this Agreement upon the occurrence of any one or more of the following events,
the Company will be without any further obligation to the Employee and will be
under no obligation to provide the Employee with any compensation whatsoever
pursuant to this Agreement other than salary and/or vacation pay in accordance
with the then current policies of the Company:

          (a)  the voluntary resignation of the Employee (in which case the
Employee will also agree to reimburse the Company for all out-of-pocket expenses
incurred by it for purposes of hiring and relocating the Employee and his family
to California from Pennsylvania);

          (b)  the death of the Employee;

          (c)  the material failure by the Employee to meet the performance
standards of the Employee's job, as determined by the Company, provided that
such material failure has not been cured within a reasonable time required to
cure such failure;

          (d)  gross negligence or willful misconduct by the Employee in the
performance of the Employee's duties for the Company;

          (e)  a material breach by Employee of any of the obligations of this
Agreement, including, specifically, but not limited to the confidentiality
provisions contained in Section 2.4 hereof;

          (f)  the conviction of the Employee (or the entering of a plea of
guilty or nolo contendere by the Employee) for fraud, misappropriation,
embezzlement, financial misconduct, or any other felony;

          (g)  the determination by the Company that the Employee has been
unable, for a continuous period of at least six (6) months or for shorter
periods totaling six (6) months during any 12-month period, to perform the
Employee's duties because of injury, illness, or other physical or mental
disability for which the Company was unable to make reasonable accommodation; or

          (h)  the refusal by the Employee to accept an offer of employment by
the Company, any affiliate of the Company, or any successor to the Company, at a
base salary that is equal to or greater than the Employee's base salary at the
time the offer is made, unless such offer of employment is for a job at a
location that is outside of the Continental United States.

II.  GENERAL PROVISIONS

     2.1. Representations by the Employee.  The Employee hereby represents and
          -------------------------------
warrants to the Company that:

          (a)  the Employee's execution and delivery of this Agreement and the
performance of the Employee's duties and obligations hereunder will not conflict
with, cause a breach or default under, or give any party a right to damages
under (or to terminate) any other agreement to which the Employee is party or by
which Employee is bound; and

          (b)  there are no restrictions, agreements or understandings that
would make unlawful the Employee's execution or delivery of this Agreement or
the Employee's employment hereunder.
<PAGE>

     2.2. Right of Offset.  The parties hereto agree that the Company may reduce
          ---------------
any compensation otherwise payable to the Employee under this Agreement by any
amounts payable by the Employee to the Company or an affiliate of the Company.

     2.3. Noncompetition.
          --------------

          (a)  The Employee agrees that, during the Term of this Agreement, he
will refrain from directly or indirectly (i) engaging or participating, as a
principal, officer, director, employee, shareholder, investor, consultant,
advisor, partner, joint venturer, broker, agent, equity owner, or in any other
capacity whatsoever, in any business enterprise (regardless of whether it is a
sole proprietorship or a corporation, partnership, trust, business association,
or other equity) that engages (in the United States), directly or indirectly, in
providing electronic testing services, calibration services and/or the sale of
gaussmeters, current sensors and probes for commercial customers or for agencies
of the United States government; or (ii) causing or attempting to cause (A) any
person or entity to whom or for whom the Company or any subsidiary of the
Company sells or distributes any product to terminate or reduce its relationship
or dealings with the Company or such subsidiary, or (B) any company whose
products are sold by or through the Company or any subsidiary of the Company to
terminate or reduce its relationship or dealings with the Company or such
subsidiary; (iii) causing or attempting to cause any employee, agent,
consultant, or independent contractor of the Company or of any subsidiary of the
Company to cease serving the Company in such capacity; or (iv) hiring or
otherwise retaining or soliciting any person who is employed by the Company as
an employee, consultant or other contractor of the Company.

     2.4. Confidentiality.
          ---------------

          (a)  General Information.  The Employee shall refrain from disclosing
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to any other person or entity any confidential documents or confidential
information concerning the Company or its affiliates obtained by the Employee at
any time. "Confidential Information" shall include but not be limited to
communications with customers and active prospective customers, prices,
contracts, financial information, marketing strategies, customer programs,
computer programs, intellectual property and any other such information that
would not otherwise be generally known by or available to a third party.

          (b)  Information Regarding this Agreement.  Except as may be
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necessary to enforce the terms of this Agreement or as may otherwise be required
by law, the Employee shall not disclose to any other person or entity: (i) any
of the contents of this Agreement, (ii) any of the contents of the discussions,
negotiations, or correspondence leading up to this Agreement, or (iii) any
information regarding a potential or actual transaction concerning the business.

          The parties hereto agree that the provisions contained in Section
2.4(a) shall survive the termination of this Agreement and shall remain in force
for a period of three (3) years thereafter.

     2.5. Expenses.  Except as otherwise specifically provided in this
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Agreement, each party hereto will pay its own expenses respectively incurred or
to be incurred by it in performing its obligations under this Agreement, or in
consummating the transactions contemplated by this Agreement.

     2.6. Notices.  Any notice or communication given pursuant to this Agreement
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must be in writing and (a) delivered personally, (b) sent by telefacsimile or
other similar facsimile transmission, (c) delivered by overnight express, or (d)
sent by registered or certified mail, postage prepaid, as follows:

          (i)  If to the Employee:

               G. Darrell Robertson
               561 Nancy Road
               Yardley, Pennsylvania 19067
               Facsimile number:  (215) 428-4587
<PAGE>

           (ii)  If to the Company:

                 Metrum-Datatape, Inc.
                 605 East Huntington Drive
                 Monrovia, California 91016-3636
                 Attention:  Vice President of Finance
                 Facsimile number:  (626) 930-9475

     All notices and other communication required or permitted under this
Agreement that are addressed as provided in this Section 2.6 will (a) if
delivered personally or by overnight express, be deemed given upon delivery; (b)
if delivered by telefacsimile or similar facsimile transmission, be deemed given
when electronically confirmed; and (c) if sent by registered or certified mail,
be deemed given when received. Any party from time to time may change its
address for the purpose of notices to that party by giving a similar notice
specifying a new address, but no such notice will be deemed to have been given
until it is actually received by the party sought to be charged with the
contents thereof.

     2.7.  Entire Agreement.  This Agreement constitutes the entire agreement
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between the parties hereto with respect to the subject matter hereof and
supersedes all prior communications, agreements, understandings,
representations, and warranties whether oral or written, between the parties
hereto with respect to the subject matter hereof.  There are no oral or written
agreements, understandings, representations, or warranties between the parties
hereto with respect to the subject matter hereof other than those set forth in
this Agreement.

     2.8.  Assignment and Amendment of Agreement.  This Agreement will be
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binding upon the parties hereto and their respective successors and permitted
assignees. Because the Employee's duties hereunder are special, personal and
unique in nature, the Employee may not transfer, sell or otherwise assign the
Employee's rights, obligations or benefits under this Agreement (and any attempt
to do so will be void). The Company may assign its rights and obligations under
this Agreement at its sole discretion. This Agreement may be modified or amended
only by a writing duly executed on behalf of each party hereto.

     2.9.  Governing Law.  This Agreement will be governed by and construed and
           -------------
enforced in accordance with the laws of the state of California (without regard
to the principles of conflict of laws) applicable to a contract executed and to
be performed in such state.

     2.10. No Third Party Rights.  Except as specifically provided in this
           ---------------------
Agreement, this Agreement is not intended and may not be construed to create any
rights (including third party beneficiary rights) in any parties other than the
Employee and the Company and their respective successors and permitted
assignees.

     2.11. Waiver and Remedies.  Any term or condition of this Agreement may be
           -------------------
waived at any time by the party that is entitled to the benefit thereof.  Any
such waiver will be in writing and will be executed by such party.  A waiver on
one occasion will not be deemed to be a waiver of the same or any other breach
on a future occasion.  All remedies, either under this Agreement or by law or
otherwise afforded, will be cumulative and not alternative.

     2.12. Invalid Provisions.  If any provision of this Agreement is held to be
           ------------------
illegal, invalid, or unenforceable under any present or future law, and if the
rights or obligations of any party hereto under this Agreement will not be
materially and adversely affected thereby, (a) such provision will be fully
severable, (b) this Agreement will be construed and enforced as if such illegal,
invalid, or unenforceable provision had never comprised a part hereof, (c) the
provisions of this Agreement will remain in full force and effect and will not
be affected by the illegal, invalid, or unenforceable provision or by its
severance herefrom, and (d) in lieu of such illegal, invalid, or unenforceable
provision, there will be added automatically as a part of this Agreement a
legal, valid and enforceable provision as similar in terms to such illegal,
invalid, or unenforceable provision as may be possible.

     2.13. Counterparts.  This Agreement may be executed simultaneously in two
           ------------
or more counterparts, each of which will be deemed an original, but all of which
together will constitute one and the same instrument.
<PAGE>

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

     COMPANY:                                EMPLOYEE:

     METRUM-DATATAPE, INC.                   G. DARRELL ROBERTSON

     /s/ Jeffrey T. Gill                     /s/ G. Darrell Robertson
     --------------------------------        ---------------------------------
     Jeffrey T. Gill
     Director<PAGE>

                                                                   Exhibit 10.17

                             TIME SHARING AGREEMENT

     This Agreement is made, effective as of November 6, 2000, by and between
ESA Services, Inc., a corporation organized under the laws of the State of
Delaware, with principal offices at 450 East Las Olas Blvd., Ft. Lauderdale, FL
33301 (hereinafter referred to as "Lessor"), and GEORGE DEAN JOHNSON, JR., with
principal offices at 961 East Main Street, Spartanburg, SC 29302 (hereinafter
referred to as "Lessee");

                                   RECITALS

     WHEREAS, Lessor is the owner of that certain civil Aircraft bearing the
United States Registration Number N122SU ("the Aircraft" or "Aircraft"), a
LearJet, Model 55B, Manufacturer's Serial Number 132;

     WHEREAS, Lessor employs a fully qualified flight crew to operate the
Aircraft; and

     WHEREAS, Lessor and Lessee desire to lease said Aircraft with flight crew
on a non-exclusive time sharing basis as defined in Section 91.501 (c) (1) of
the Federal Aviation Regulations ("FAR");

     The parties agree as follows:

     1.   Lessor agrees to lease the Aircraft to Lessee pursuant to the
          provisions of FAR 91.501 (c) (1) and to provide a fully qualified
          flight crew for all operations.  This Agreement shall commence on the
          date that it is signed and continue for one year after said date.
          Thereafter, this Agreement shall be automatically renewed on a month
          to month basis, unless sooner terminated by either party as
          hereinafter provided.  Either party may at any time terminate this
          Agreement upon thirty (30) days written notice to the other party,
          delivered personally or by certified mail, return receipt requested,
          at the address for said other party as set forth above.
<PAGE>

     2.   Lessee shall pay Lessor for each flight conducted under this Agreement
          the actual expenses of each specific flight as authorized by FAR Part
          91.501 (d).  These expenses include

          (a)  Fuel, oil, lubricants, and other additives;

          (b)  Travel expenses of the crew, including food, lodging and ground
               transportation;

          (c)  Hangar and tie down costs away from the Aircraft's base of
               operation;

          (d)  Insurance obtained for the specific flight;

          (e)  Landing fees, airport taxes and similar assessments including,
               but not limited to IRC Section 4261 and related excise taxes;

          (f)  Customs, foreign permit, and similar fees directly related to the
               flight;

          (g)  In-flight food and beverages;

          (h)  Passenger ground transportation;

          (i)  Flight planning and weather contract services; and

          (j)  An additional charge not to exceed 100% of the expenses listed in
               subparagraph (a) of this paragraph.

     3.   Lessor will pay all expenses related to the operation of the Aircraft
          when incurred, and will provide an invoice and bill Lessee for the
          expenses enumerated in paragraph 2 above on the last day of the month
          in which any flight or flights for the account of Lessee occur.
          Lessee shall pay Lessor for said expenses within fifteen (15) days of
          receipt of the invoice and bill therefor.

     4.   Lessee will provide Lessor with requests for flight time and proposed
          flight schedules as far in advance of any given flight as possible,
          and in any case, at

                                       2
<PAGE>

          least twenty-four (24) hours in advance of Lessee's planned departure.
          Requests for flight time shall be in a form whether written or oral,
          mutually convenient to, and agreed upon by the parties. In addition to
          the proposed schedules and flight times Lessee shall provide at least
          the following information for each proposed flight at some time prior
          to scheduled departure as required by the Lessor or Lessor's flight
          crew:

          (a)  proposed departure point;

          (b)  destination;

          (c)  date and time of flight;

          (d)  the number of anticipated passengers;

          (e)  the nature and extent of luggage and/or cargo to be carried

          (f)  the date and time of return flight, if any; and

          (g)  any other information concerning the proposed flight that may be
               pertinent or required by Lessor or Lessor's flight crew.

     5.   Lessor shall have final authority over the scheduling of the Aircraft,
          provided, however, that Lessor will use its best efforts to
          accommodate Lessee's needs and to avoid conflicts in scheduling.

     6.   Lessor shall be solely responsible for securing maintenance,
          preventive maintenance and required or otherwise necessary inspections
          on the Aircraft, and shall take such requirements into account in
          scheduling the Aircraft.  No period of maintenance, preventative
          maintenance or inspection shall be delayed or postponed for the
          purpose of scheduling the Aircraft, unless said maintenance or
          inspection can be safely conducted at a later time in compliance with
          all

                                       3
<PAGE>

          applicable laws and regulations, and within the sound discretion of
          the pilot in command. The pilot in command shall have final and
          complete authority to cancel any flight for any reason or condition
          which in his judgment would compromise the safety of the flight.

     7.   Lessor shall employ, pay for and provide to Lessee a qualified flight
          crew for each flight undertaken under this Agreement.

     8.   In accordance with applicable Federal Aviation Regulations, the
          qualified flight crew provided by Lessor will exercise all of its
          duties and responsibilities in regard to the safety of each flight
          conducted hereunder.  Lessee specifically agrees that the flight crew,
          in its sole discretion, may terminate any flight, refuse to commence
          any flight, or take other action which in the considered judgment of
          the pilot in command is necessitated by considerations of safety.  No
          such action of the pilot in command shall create or support any
          liability for loss, injury, damage or delay to Lessee or any other
          person.  The parties further agree that Lessor shall not be liable for
          delay or failure to furnish the Aircraft and crew pursuant to this
          Agreement when such failure is caused by government regulation or
          authority, mechanical difficulty, war, civil commotion, strikes or
          labor disputes, weather conditions, or acts of God.

     9.   At all times during the term of this Lease, Lessor shall cause to be
          carried and maintained, at Lessor's cost and expense, physical damage
          insurance with respect to the Aircraft in the amount set forth below:

          Aircraft Physical Damage           $5,650,000.00
          (No Deductible While
          In Motion or Not in Motion)

                                       4
<PAGE>

          At all times during the term of this Lease, Lessor shall also cause to
          be carried and maintained, at lessor's cost and expense, third party
          aircraft liability insurance, passenger legal liability insurance,
          property damage liability insurance, and medical expense insurance in
          the amounts set forth below:

          Combined Liability Coverage for
          Bodily Injury and Property Damage
          Including Passengers -

          Each Occurrence                    $100,000,000.00

          Medical Expense Coverage -
          Each Person                        $5,000.00

     Lessor shall also bear the cost of paying any deductible amount on any
policy of insurance in the event of a claim or loss.

     Any policies of insurance carried in accordance with this Lease: (i) shall
name lessee as an additional insured; and (ii) shall contain a waiver by the
underwriter thereof of any right of subrogation against Lessee.  Each liability
policy shall be primary without right of contribution from any other insurance
which is carried by Lessee or Lessor and shall expressly provide that all of the
provisions thereof, except the limits of liability, shall operate in the same
manner as if there were a separate policy covering each insured.

     Lessor shall submit this Lease for approval to the insurance carrier for
each policy of insurance on the aircraft.  Lessor shall arrange for a
Certificate of Insurance evidencing appropriate coverage as to the Aircraft and
the satisfaction of the requirements set forth above to be given by its
insurance carriers to Lessor.

     10.  Lessee warrants that:

          (a)  It will use the Aircraft for and on account of its own business
               only, and will not use the Aircraft for the purpose of providing
               transportation of passengers or cargo in air commerce for
               compensation or hire;

                                       5
<PAGE>

          (b)  It shall refrain from incurring any mechanics or other lien in
               connection with inspection, preventative maintenance, maintenance
               or storage of the Aircraft, whether permissible or impermissible
               under this Agreement, nor shall there be any attempt by any party
               hereto to convey, mortgage, assign, lease or any way alienate the
               Aircraft or create any kind of lien or security interest
               involving the Aircraft or do anything or take any action that
               might mature into such a lien; and

          (c)  During the term of this Agreement, it will abide by and conform
               to all such laws, governmental and airport orders, rules and
               regulations, as shall from time to time be in effect relating in
               any way to the operation and use of the Aircraft by a timesharing
               Lessee.

     11.  For purposes of this Agreement, the permanent base of operation of the
          aircraft shall be Spartanburg, SC.

     12.  Neither this Agreement nor any party's interest herein shall be
          assignable to any other party whatsoever.  This Agreement shall inure
          to the benefit of and be binding upon the parties hereto, their heirs,
          representatives and successors

                                       6
<PAGE>

     13.  TRUTH IN LEASING STATEMENT

     THE AIRCRAFT, A LEARJET 55B MODEL, MANUFACTURER'S SERIAL NO. 132, CURRENTLY
REGISTERED WITH THE FEDERAL AVIATION ADMINISTRATION AS N122SU HAS BEEN
MAINTAINED AND INSPECTED UNDER FAR PART 91 DURING THE 12 MONTH PERIOD PRECEDING
THE DATE OF THIS LEASE.

     THE AIRCRAFT WILL BE MAINTAINED AND INSPECTED UNDER FAR PART 91 FOR
OPERATIONS TO BE CONDUCTED UNDER THIS LEASE.  DURING THE DURATION OF THIS LEASE,
ESA SERVICES, INC. 450 EAST LAS OLAS BLVD., SUITE 1100, FORT LAUDERDALE, FLORIDA
33301, IS CONSIDERED RESPONSIBLE FOR OPERATIONAL CONTROL OF THE AIRCRAFT UNDER
THIS LEASE.

     AN EXPLANATION OF FACTORS BEARING ON OPERATIONAL CONTROL AND PERTINENT
FEDERAL AVIATION REGULATIONS CAN BE OBTAINED FROM THE NEAREST FAA FLIGHT
STANDARDS DISTRICT OFFICE.
     THE "INSTRUCTIONS FOR COMPLIANCE WITH TRUTH IN LEASING REQUIREMENTS"
ATTACHED HERETO ARE INCORPORATED HEREIN BY REFERENCE.

     I, THE UNDERSIGNED, GREGORY R. MOXLEY, AS CHIEF FINANCIAL OFFICER OF ESA
SERVICES, INC., 450 EAST LAS OLAS BLVD., SUITE 1100, FORT LAUDERDALE, FLORIDA
33301, CERTIFY THAT IT IS RESPONSIBLE FOR OPERATIONAL CONTROL OF THE AIRCRAFT
AND THAT I UNDERSTAND THE RESPONSIBILITIES FOR COMPLIANCE WITH APPLICABLE
FEDERAL AVIATION REGULATIONS.

     IN WITNESS WHEREOF, the parties have executed this Agreement.

ESA Services, Inc.

By: /s/ Gregory R. Moxley
    -------------------------------------------
    Gregory R. Moxley, Chief Financial Officer

By: /s/ George Dean Johnson, Jr.
    -------------------------------------------
    George Dean Johnson, Jr.

                                       7

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