Document:

<PAGE>   1
                                                                  EXHIBIT 10.13

[LETTERHEAD]

September 22, 1998

Mr, Kenneth R. Vines
4556 Daffodil Trail
Plano, Texas 75093

Dear Ken:

On behalf of myself and our Board of Directors. I am pleased to offer you the
position of Chief Financial Officer (CFO), Triton Network Systems, Inc.
(Triton). The following is designed to serve as a record of the essential terms
of your employment, which supersedes all prior discussions:

POSITION
SENIOR VICE PRESIDENT & CHIEF FINANCIAL OFFICER (CFO);
TRITON NETWORK SYSTEMS, INC.
This position is an executive level position within Triton Network Systems.
Responsibilities include, but are not limited to management of Finance,
Accounting, Human Resources, MIS, and Facilities. The objectives of the position
will be based upon Triton Network Systems business plan and associated operating
budgets established by the executive management team and approved by the Board
of Directors.

SALARY
Your base salary will be $150,000 per annum payable semi-monthly in arrears.

BONUSES
20% end of year bonus based upon completion of personal and corporate
objectives.

STOCK OPTIONS
You will receive, subject to board approval, 300,000 Triton share options with
an exercise price of $.26 per Share. Your options will vest based on the
following formula:

     o    One fourth (1/4) after completion of one full year of employment with
          Triton.
     o    1/48th each month thereafter.

                   8529 SouthPark Circle o Orlando, FL 32819
                   Phone (407) 903-0900 o Fax (407) 903-0999

<PAGE>   2

Mr. Kenneth R. Vines
September 22, 1998
Page Two

This vesting is provided in each case that your employment by or services to the
company have not been terminated prior to the date of any such vesting except as
specified in this offer letter. You will also have the option of purchasing the
options upon your employment and placing these in an escrow account with the
above vesting schedule. Options are granted in accordance with and governed by
the Triton Network Systems, Inc. 1997 Stock Option Plan. Should the company be
sold or be acquired by another company (excluding transactions in which the
Triton shareholders hold a majority of the voting equity of the surviving
entity), all stock or stock options will vest immediately.

Notwithstanding anything herein or in the Plan to the contrary, if the
undersigned's employment with the Company is terminated Without Cause within one
year of the Vesting Commencement Date, then, upon such termination, the Shares
subject to the Option shall be vested in an amount equal to 1/48th of the Shares
per month from the Vesting Commencement Date until the termination date, plus an
additional 6/48ths of the Shares subject to the Option shall also vest at the
time of termination.

SEVERANCE

The company will provide you with a severance package in the event that Triton
Network Systems, Inc. terminates your employment without cause. Without
cause shall mean for any reason other than:

A.       Illegal acts (other than minor traffic violations, misdemeanors, or
         other Acts that do not result in criminal conviction) including theft
         or embezzlement.

B.       Material violation of published written policies of the company or
         material violation of any confidentiality or proprietary information
         agreement with the company.

C.       Irresponsible, unauthorized acts of a willful nature in the performance
         of duties or repeated failure to follow the reasonable directions of
         the Board of Directors or CEO.

That package will provide you with up to six (6) months base salary,
twenty-flve percent (25%) of your annual bonus and benefit continuance from the
time of your involuntary termination. If you are employed within six months of
your termination from the company, your severance payments will stop at the time
of your new employment. You will continue to vest your stock options during your
severance period. If your employment is terminated without cause because of or
within one year after a sale of the company, you will receive six months
compensation (base salary and bonus at plan), plus six months benefit
continuance.

<PAGE>   3

Mr. Kenneth R. Vines
September 22, 1998
Page Three

VACATION

You will be eligible for three weeks of vacation.

BENEFITS

Triton will provide the following paid benefits, at its sole discretion:

 - Medical Insurance                       - Disability Insurance
 - Life Insurance                          - Dental Insurance
 - 401 (K) Plan Eligibility                - Tuition Reimbursement

RELOCATION

You will be reimbursed for relocation expenses as outlined in Exhibit A.

PROPIETARY INFORMATION AGREEMENT

You will be asked to sign the attached Employee Proprietary Information
Agreement.

COMMENCEMENT OF EMPLOYMENT

No later than October 19, 1998.

The preceding sets forth all of the terms of Triton Network Systems, Inc.'s
offer to employ you. If this offer is in accordance with your understanding and
acceptable to you, please sign, date and return to me a copy of this letter by
September 30, 1998.

Sincerely

/s/ Brian J. Andrew
---------------------------------
Brian J. Andrew
President & Chief Executive Officer

I am in agreement with the terms as stated and will accept this offer of
employment by Triton Network Systems, Inc.

                                                  9/30/98
-----------------------------                     -----------------------------
Name                                              Date

<PAGE>   4

[LETTERHEAD]

July 20, 1999

Mr. Kenneth R. Vines
11431 Willow Gardens Drive
Windermere, FL 34786

Dear Ken:

         In consideration of your further employment with the Company, we are
proposing the following Amendment to your Employment Offer letter dated
September 22. 1998.

         NON-DISPARAGEMENT:

         You agree that should your employment with the Company terminate for
any reason, you will not disparage the Company, which includes, but is not
limited to, making negative comments about the Company, its products, its
employees, Officers, or Board of Directors, or your employment with the Company.
In addition, should your employment With the Company terminate for any reason,
the Company agrees to not disparage you.

         NON-SOLICITATION:

         You agree that for six (6) months following your employment with the
Company, whether the termination shall be voluntary or involuntary, with or
without cause, or for any other reason whatsoever, you shall not, directly or
indirectly or on behalf of yourself or any other person or entity: (a) attempt
to hire any other employee of the Company or otherwise encourage or attempt to
encourage any other employee of the Company to leave employment With the
Company; or (b) in any manner or at any time, solicit or encourage or discuss
with any person, firm, corporation, or any business entity who are Customers of
the Company and/or other employees of the Company to cease doing business with
the Company and/or other employees of the Company. In the event you breach any
term contained in this Section, you immediately waive any right or entitlement
to the Severance Benefits described in the Employment Severance Agreement and
will pay to the Company an amount equal to any portion of the Severance Benefits
paid to you prior to your breach, in addition to any damages the Company may be
able to recover.

CONFIDENTIAL
<PAGE>   5

          If you are in agreement with the terms of this Amendment, please sign
and date below.

                                                    Sincerely,

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

I accept the terms of this amendment to my offer of employment.

-----------------------------
Name

-----------------------------
Date

CONFIDENTIAL<PAGE>   1
                                                                   Exhibit 10.14

[TRITON NETWORK SYSTEMS, INC. LOGO]

December 18, 1998

Mr. Doug Campbell
161 Lonong Chuan #02-01
New Tech Park, Singapore 556741

Dear Doug:

it is with pleasure that Triton Network Systems, Inc. extends to you an offer of
employment for the position of Vice President, Marketing and International
Sales. You will be reporting to Brian J. Andrew, and your work location will be
in Orlando, Florida. The following is designed to serve as a record of the
essential terms of your employment, which supersedes all prior discussions:

COMMENCEMENT OF EMPLOYMENT: No later than 17 Feb 99 or sooner.

REMUNERATION:      Your base salary will be $126,000 per annum payable
                   semi-monthly in arrears with a 20% end of year bonus based
                   upon completion of personal and corporate objectives

STOCK OWNERSHIP:   You will receive, subject to board approval, 250,000 Triton
                   share options. Your options will vest based on the following
                   formula:

                   - One fourth (1/4) after completion of one full year of
                     service with Triton.

                   - 1/48th each month thereafter

                   This vesting is provided in each case that your employment by
                   or services to the Company have not been terminated prior to
                   the date of any such vesting.

                   Your official stock option contract will be sent to you for
                   your review and signature.

RELOCATION:        Triton will re-imburse for [illegible] all valid relocation
                   expenses, when supported with original receipts, for up to
                   six months after your start date.

                   In the event that you voluntarily resign from Triton within
                   twelve months of your start date, you will be liable for all
                   your relocation expenses previously re-imbursed by Triton.

<PAGE>   2

VACATION:          Vacation is on a calendar year basis, and accrues on a
                   monthly basis. For the first three years of employment, the
                   fate of accrual shell be 10 hours per month (three weeks per
                   year). After three years of continuous employment with
                   Triton, your vacation entitlement will increase to 13.3 hours
                   per month (four weeks per year).

BENEFITS:          Triton will provide the following paid benefits, at its sole
                   discretion:

                   Medical Insurance               Disability Insurance
                   Life Insurance                  Dental Insurance
                   401(K) Plan Eligibility         Tuition Reimbursement

Please sign and return the offer letter to me on or before 5:00 PM EST date
1998.

1 am delighted that you are joining the Triton team and look forward to
assisting you in achieving your professional objectives. I believe that you will
enjoy working here and find it to be a professionally satisfying experience.
Please let me know if you have any questions about your employment at Triton or
if there is any other information or material I can provide for you.

Sincerely

/s/ Brian J. Andrew
--------------------------------------------
Brian J. Andrew
President & CEO Triton Network Systems, Inc.

Acceptance of Offer

/s/ Doug Campbell
--------------------------------------------
Doug Campbell

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00002-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00002-of-00352.parquet"}]]