<PAGE>   1
                                                                    Exhibit 10.2

                                      NOTE

$1,625,000                                                     December 22, 1999

                  FOR VALUE RECEIVED, C. THOMAS FAULDERS, III, an individual
residing at 6721 Benjamin Street, McLean, Virginia 22101 (the "MAKER"), promises
to pay to the order of LCC INTERNATIONAL, INC., a Delaware corporation, or
assigns, (the "HOLDER") on the earlier of (i) December 22, 2004 and (ii) the
date on which the Maker is no longer employed as the Chairman and Chief
Executive Officer of the Holder, at 7925 Jones Branch Drive, McLean, Virginia
22102, or at such other place as the Holder of this Note may from time to time
designate, the principal amount of One Million Six Hundred Twenty-Five Thousand
Dollars ($1,625,000), subject to adjustment as provided in Section 1.4 of the
Loan Agreement (as defined below). This Note shall bear interest on the unpaid
principal amount hereof from the date hereof, until paid in full, said interest
to be due and payable quarterly on April 1, July 1, October 1 and January 1
commencing on April 1, 2000, at a rate per annum (computed on the basis of a 360
day year and of the actual number of days elapsed) equal to 6.06%, compounded
quarterly, (the "BASE RATE"), provided that, should an Event of Default exist
and be continuing for ten (10) Business Days, interest shall instead accrue on
the outstanding principal balance of this Note from the date of such Event of
Default at the rate of the Base Rate plus three percent (3%) per annum,
compounded quarterly, until such Event of Default is cured or waived or all
principal or interest under this Note is paid in full. All payments hereunder
shall be made in lawful money of the United States of America without offset for
any amounts owed by the Holder to the Maker.

                  The unpaid principal amount of this Note may be prepaid in
whole or in part at any time or times without premium or penalty. Each
prepayment shall be applied first to the payment of all interest and other
amounts accrued hereunder on the date of any such prepayment, and the balance of
any such prepayment shall be applied to outstanding principal.

                  This Note is the Note referred to in that certain Loan
Agreement, dated as of the date hereof, between the Maker and the Holder (the
"LOAN AGREEMENT") and evidences the Loan advanced by the Holder to or for the
benefit of the Maker as Borrower under the Loan Agreement.  Capitalized terms
not defined herein shall have the meanings given to them in the Loan
Agreement. Neither the reference to the Loan Agreement nor any provision

thereof shall affect or impair the absolute and unconditional obligation of the
Maker to pay the principal amount outstanding hereunder, together with interest
accrued thereon, when due.

                  The Loan Agreement provides for the acceleration of all
amounts due hereunder upon the occurrence of an Event of Default and for a
discharge of all amounts due hereunder upon the occurrence of certain events
specified therein.

                  The Holder may, upon the occurrence of any Event of Default
hereunder, have resort to any collateral, whether real or personal property,
given as security for this Note in any order, and may sell and dispose of such
collateral in whole or in part, at any time or from time to time, with no
requirement on the part of the Holder of this Note to marshal assets. The Holder
shall not be required to preserve any rights in such collateral as against prior
parties. In the event that the Holder is required to give notice of any intended
disposition of collateral held as security for this Note, five (5) days' notice
given by mail or telegraph to the last known address of Maker shall be deemed to
be reasonable notice.

                  The Maker promises to pay all costs and expenses (including
without limitation attorneys' fees and disbursements) incurred in connection
with the collection hereof or the enforcement by the Holder of its rights
hereunder or under the Loan Agreement or under any other instrument evidencing
or securing the obligation represented by this Note or in the protection or
realization of any collateral now or hereafter given as security for the
repayment or performance hereof.

                  Each Obligor (which term shall include the Maker and all
sureties, guarantors, endorsers, and other persons assuming obligations pursuant
to this Note) under this Note hereby waives presentment, protest, demand, notice
of dishonor, and all other notices, and all defenses and pleas on the grounds of
any extension or extensions of the time of payments or the due dates of this
Note, in whole or in part, before or after maturity, with or without notice. No
renewal or extension of this Note, no release or surrender of any collateral
given as security for this Note, no release of any Obligor, and no delay in
enforcement of this Note or in exercising any right or power hereunder, shall
affect the liability of any Obligor. The pleading of any statute of limitations
as a defense to any demand against any Obligor is expressly waived.




                                     (1)
<PAGE>   2

                  No single or partial exercise by the Holder of any right
hereunder, under the Loan Agreement, or under any other agreement given as
security for this Note or pertaining hereto, shall preclude any other or further
exercise thereof or the exercise of any other rights. No delay or omission on
the part of the Holder in exercising any right hereunder shall operate as a
waiver of such right or of any other right under this Note.

                  The Maker hereby declares, represents, and warrants that the
indebtedness evidenced hereby is made for "BUSINESS PURPOSES" within the meaning
of Va. Code Ann. Section 6.1-330.44 (1950), and waives any defense to the
enforceability of this Note based on the inapplicability of Va. Code Ann.
Section 6.1-330.44 (1950) hereto.

                  Whenever used herein, the words "MAKER" and "HOLDER" and
"OBLIGOR" shall be deemed to include their respective successors and assigns.

                  This Note shall be governed by and construed under and in
accordance with the laws of the Commonwealth of Virginia (but not including the
choice of law rules thereof).

                  IN WITNESS WHEREOF, the undersigned has duly executed this
Note, as of the day and year first hereinabove set forth.

                                          /s/ C.THOMAS FAULDERS, III
                                          --------------------------
                                          C. Thomas Faulders, III


                                     (2)