Document:

Exhibit 10.1

                                      DBS
                                      inc.
                               [GRAPHIC OMITTED]

January 29, 2001

Mr. Roger May
Advanced Communication Technologies, Inc.
19200 Von Karman Avenue, Suite 500
Irvine, CA 92612

Re:   Sublease Agreement Renewal
      Office No.13
      19200 Von Karman Ave., Suite 500, Irvine, CA 92612

Dear Mr. May:

As a courtesy we are advising you that the term of the above referenced
agreement will renew March 1, 2001 for an additional twelve month term.

The monthly rental rate for Office No.13 will be increased approximately 6%
($100) effective March 1, 2001. All other terms and conditions of the above
referenced agreement shall remain as stated.

As always, we appreciate your tenancy and look forward to continuing to provide
you with excellent office facilities and support services. Please contact me
directly at (949) 622-5408 if you would like to discuss your lease term or if
you have any questions I can help you with.

Sincerely,

DBS, Inc.

Jeanne Franks
Director of Sales & Leasing

dbs:jf

                       Diversified Business Services, Inc.
               Corporate Office o 4605 MacArthur Court, Suite 470
       Newport Beach, California 92660 o Fax: 949/752-2814 o 949/752-2272

<PAGE>

                                      DBS
                                      inc.
                               [GRAPHIC OMITTED]

July 17, 2000

Mr. Roger May
CEO
Advanced Communication  Technologies, Inc.
19200 Von Karman Avenue, Suite 500
Irvine, CA 92612

REFERENCE:  Amendment No. 3 to Sublease Agreement dated February 1, 2000
            between Blazina, Risk & Associates ("Lessee") and DBS, Inc.
            ("Lessor") for Office No. 13 (as subsequently amended for name
            change to Irvine Global Insurance Services, Inc.) at
            19200 Von Karman, Avenue, Suite 500, Irvine, CA 92612

Dear Mr. May:

Per your request, this letter shall serve to amend the above referenced Sublease
Agreement and subsequent Amendments to reflect the change of name and billing
responsibility from Irvine Global Insurance Services. Inc. to Advanced
Communication Technologies, Inc. effective August 1, 2000. All other terms and
conditions of the agreement shall remain as stated.

Please return an executed copy of this amendment at your earliest convenience; a
copy has been enclosed for your file.

We appreciate your tenancy and look forward to continuing to provide you with
excellent office facilities and support services. In the event I can ever be
of any assistance to you, please do nor hesitate to contact me directly at
(949) 752-2272.

Sincerely,

DBS, Inc.                             ACKNOWLEDGED & AGREED

                                                 Roger May
/s/ Carla Moreland                    By __________________________
------------------------------
    Carla Moreland                                    CEO
    President                         Title -----------------------

                                                  6/18/2000
                                      Date ------------------------

Enclosure

cc:  Ms. Jeanne Franks, Director of Sales & Leasing
     Ms. Kimberly Moore, Center Manager

                       Diversified Business Services, Inc.
               Corporate Office o 4605 MacArthur Court, Suite 470
       Newport Beach, California 92660 o Fax: 949/752-2814 o 949/752-2272

<PAGE>

                                      DBS
                                      inc.
                               [GRAPHIC OMITTED]

May 20, 2000

Nancy L. Blazina
President
Irvine Global Insurance Services, Inc.
19200 Von Karman, Suite 500
Irvine, California: 92612

Reference:  Amendment No. 2 to Sublease Agreement dated February 1, 2000
            Office No. 13
            19200 Von Karman, Suite 500, Irvine, CA 92612

Dear Ms. Blazina:

Per your letter of request dated May 1, 2000, this letter shall serve to amend
the above referenced Sublease Agreement to change the name from Blazina Risk &
Associates to Irvine Global Insurance Services, Inc. All other terms and
conditions of the referenced agreement shall remain as stated.

Please return an executed copy of this amendment acknowledging your agreement; a
copy has been included for your file.

We appreciate your tenancy and look forward to continuing to provide you with
excellent office facilities and support services. In the event I can ever be of
any assistance to you, please do not hesitate to contact me directly at (949)
752-2272.

Sincerely,

DBS, Inc.                             ACKNOWLEDGED & AGREED

                                              Nancy L. Blazina
/s/ Carla Moreland                    By __________________________
------------------------------
    Carla Moreland                                President
    President                         Title -----------------------

                                                  6/1/2000
                                      Date ------------------------

Enclosure

cc:  Ms. Jeanne Franks, Director of Sales & Leasing

                       Diversified Business Services, Inc.
               Corporate Office o 4605 MacArthur Court, Suite 470
       Newport Beach, California 92660 o Fax: 949/752-2814 o 949/752-2272

<PAGE>

                                      DBS
                                      inc.
                               [GRAPHIC OMITTED]

February 14, 2000

Mr. Roger May
Blazina, Risk & Associates, Inc.
19200 Von Karman Avenue
Suite 500
Irvine, CA 92612

REFERENCE:  Amendment No. 1 to Sublease Agreement dated February 1, 2000
            19200 Von Karman Avenue, Suite 5O0, Irvine, CA 92612

Dear Mr. May:

Per your request, this letter shall serve to amend the above referenced Sublease
Agreement to reflect the relocation from Office No. 10/Suite 500 to Office No.
13/Suite 500 effective April 1, 2000 at the monthly rental rate of $1725. All
other terms and conditions of the agreement shall remain as stated.

Please return the executed Amendment at your earliest convenience along with
payment of the enclosed invoice. A copy will be returned for your file.

We appreciate your tenancy and look forward to continuing to provide you with
excellent office facilities and support services.

Sincerely,

DBS, Inc.                             ACKNOWLEDGED & AGREED

                                                 Roger May
/s/ Carla Moreland                    By __________________________
------------------------------
    Carla Moreland                               [ILLEGIBLE]
    President                         Title -----------------------

                                                  2/14/2000
                                      Date ------------------------

dbs:jf

                      Diversified Business Services, Inc.
               Corporate Office o 4605 MacArthur Court, Suite 470
       Newport Beach, California 92660 o Fax: 949/752-2814 o 949/752-2272

<PAGE>

                               SUBLEASE AGREEMENT

      This Lease Agreement is made on this 1st day of February, 2000, at Newport
Beach, California between DIVERSIFIED BUSINESS SERVICES, INC. (hereinafter
"Lessor" or "DBS") and Blazina, Risk & Associates, Inc. (hereinafter "Lessee" or
"Tenant").

                                   I. Premises

      DBS hereby leases to Lessee and Lessee hereby hires from DBS, the property
hereinafter referred to as the "subject premises" located in the City of
Irvine, County of Orange, State of California, and more particularly described
as 19200 Von Karman Avenue, Suite 500, Office No(s). 10 (Exhibit "A").

                                    II. Term

      The term of this Lease shall be for 12 months, commencing on the 1st day
of March 2000, and ending on the 28th day of February 2001. Said rental term
shall be automatically extended for the same period and all provisions
applicable to the initial lease term shall apply to the extended lease term(s)
with the exception of renewal rate, unless Lessee gives Lessor or Lessor gives
Lessee written notice of cancellation of this renewal provision at least thirty
(30) days prior to the expiration of any lease term. For the purpose of
interpretation, a thirty day notice specifically means on or before the first
day of the last month of occupancy.

                            III. Rent & Rent Deposit

      Tenant shall pay as rent DBS the sum of One Thousand Four Hundred
Twenty-Five & 00/100 --- Dollars ($1425.00) as the first month's rent and the
sum of One Thousand Four Hundred Twenty-Five & 00/100 Dollars ($1425.00) as a
deposit against payment of rent for the last month of occupancy under this
Sublease Agreement; thereafter, on or before the first day of each succeeding
month, Lessee shall pay the sum of One Thousand Four Hundred Twenty-Five &
00/100 Dollars ($1425.00).

      In the event payment of rent is made after the fifth (5) day of the month,
an automatic late charge of 10% ($142.50) will be charged and must be included
with rental payment. A $25 charge will be paid by the Lessee to the Lessor for
each returned check.

      The deposit for payment of the final month's rent provided for hereunder
may be used by Lessor for any purpose, free of trust, and no interest shall be
paid to Lessee thereon.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     1 of 5
<PAGE>

                                 IV. Set-Up Fee

      Lessee acknowledges that Lessee has inspected the subject premises prior
to taking occupancy and that the subject premises are clean and in good repair.
On or before occupancy, Lessee shall pay Lessor the sum of Two Hundred & 00/000
--- Dollars ($200.00) for payment of expenses incurred by Lessor for door
sign(s), directory signs, keys, and general administrative set-up of account.

                               V. Use of Premises

      The subject premises shall be used by Lessee as a business office and for
uses normally incident thereto and for no other purpose. Lessee shall allow no
hazardous or noxious materials to be stored at the subject premises and Lessee
shall allow no activities on the subject premises which are illegal or otherwise
constitute a nuisance or disturbance to other tenants of the building.

                          VI. Covenants of Tenant/Lessee

      Tenant covenants and agrees to pay each monthly installment of rent
provided for herein on or before the due date, to use the subject premises for
the purpose hereinabove stated, and to surrender the subject premises, together
with appropriate office and building keys, upon the termination of tenancy in as
good condition as existed at the date of initial occupancy, reasonable wear and
tear excepted.

      (a) Default: The occurrence of any of the following shall constitute a
material default and breach of this Lease by Lessee: 1) Any failure by Lessee to
pay rent or to make any other payments required to be made by Lessee hereunder,
after written notice; 2) The abandonment or vacation of the Premises by Lessee,
bankruptcy of Lessee, or assignment for benefit of creditors; 3) A failure by
Lessee to observe and perform any other provision of this Lease to be observed
or performed by Lessee, where such failure continues for thirty (30) days after
written notice thereof by Lessor to Lessee.

      In the event of any such default by Lessee, then in addition to any other
remedies available to Lessor at law or in equity, Lessor shall have the
immediate option to terminate this Lease and all rights of Lessee hereunder by
giving written notice of such intention to terminate. In the event that Lessor
shall elect to so terminate this Lease then Lessor may recover from Lessee any
unpaid rent plus interest on said unpaid rental at the rate of ten percent (10%)
per annum.

      In the event of any such default by Lessee, Lessor shall also have the
right, with or without terminating this Lease, to re-enter the Premises and
remove all persons and property from the Premises; such property may be removed
and stored in a public warehouse or elsewhere at the cost of and for the account
of Lessee.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     2 of 5
<PAGE>

      (b) Abandonment: Lessee shall not vacate or abandon the premises at any
time during the term and if Lessee shall abandon, vacate or surrender said
premises for a period of thirty (30) days or be dispossessed by process of law,
or otherwise, any personal property belonging to Lessee and left on the premises
shall be deemed to be abandoned.

      (c) Keys: Lessee shall receive one key for each office leased and one key
for entry into main office. Lessee shall pay to Lessor the sum of $5.00 for each
key not returned at the expiration of this Lease, or for any additional
duplicate keys provided to Lessee. Tenant shall not alter any lock or install
additional locks or bolts on any door.

      (4) Rules & Regulations: Lessee agrees to observe and comply with the
Building Rules and Regulations as specified on Exhibit "D-1" and the Parking
Rules and Regulations as specified on Exhibit "D-2" attached hereto.

      (e) Lessor's Employees: Should Lessee elect to hire any of Lessor's
employees. during tenancy and/or for a one (1) year period following vacancy of
premises, a fee shall be paid to Lessor in the amount of $10,000.00 per employee
as compensation for Lessor's loss thereof, unless Lessor does not intend to
retain said employee(s).

      (f) Copy Equipment: Lessee may maintain their own "desktop" copy equipment
inside the leased office. Free-standing machines and/or machines that require
additional electricity or dedicated circuitry are not permitted. Lessee also
agrees not to allow or solicit other clients on the premises to use Lessee's
copy equipment.

                          VII. Covenants of DBS/Lessor

      Lessor agrees to pay for all utilities (excepting local and long distance
telephone service, which shall be billed separately as specified under Article
VIII) and janitorial service.

      Rental payment includes telephone answering and reception services during
business hours (8 a.m. to 5 p.m.) Monday through Friday, use of the conference
room(s) by Tenant as reserved on an as-needed basis, and coffee service.

      DBS shall provide office support services Monday through Friday during
business hours; a separate statement for those services based on the then
current rate sheet (Exhibit "B") shall be rendered at the end of each month and
is due and payable upon presentation. As charges represent costs for labor and
materials (such as postage, shipping charges, stationary supplies, local and
long distance telephone service, parking validations, etc.) that have been
incurred by DBS on behalf of the Lessee/Tenant during the previous monthly
accounting period; payment is due no later than the 10th day of each month
following presentation of this statement.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     3 of 5
<PAGE>

                        VIII. Telephone Equipment/Service

      Lessee shall pay for the installation and all charges pertaining to
Lessee's telephone service. Lessee shall pay directly to Lessor the cost of
connecting Lessee's telephone equipment and service (Exhibit "C") and the
monthly charges for telephone equipment, and all associated local and long
distance charges (a copy of these charges will be provided with the monthly
office services invoice).

                     IX. Insurance & Personal Property Taxes

      Tenant shall be responsible to provide insurance protection of personal
property and liability within the subject premises and shall hold DBS harmless
from any claim arising out of events occurring within the confines of the
subject premises. DBS shall provide Liability insurance for the common areas
providing access to the subject premises for Tenant and Tenant's business
invitees. Lessee is responsible for payment of all taxes levied or assessed on
Lessee's personal property.

                                X. Superior Lease

      The parties hereby acknowledge that this Sublease Agreement is subordinate
to a Superior Lease. The building in which the subject premises is located is
owned by Atrium Irvine Limited Partnership. DBS has entered into a written lease
with Atrium Irvine Limited Partnership and Diversified Business Services, Inc.
dated February 2,1995. The parties mutually acknowledge that this Sublease
Agreement is entered into with the knowledge of aforesaid Superior Lease. The
parties, and each of them, represent that they will do no act with respect to
the subject premises which would violate the terms of the Superior Lease as
defined in Exhibits D-1 and D-2.

                           XI. Successors and Assigns

      The covenants and conditions herein contained shall be subject to the
provisions as to assignment, apply to and bind the heirs, successors, executors,
administrators and assigns of the parties hereto.

                                XII. Miscellaneous

      1. This Lease Agreement is entered into in the State of California and
shall be interpreted in accordance with the laws of the State of California.

      2. This Lease Agreement constitutes the entire Agreement of the parties
with respect to the subject matter hereof.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     4 of 5
<PAGE>

      3. This Lease Agreement may not be modified except in writing signed by
both parties.

      4. In the event of any litigation between the parties arising out of this
Lease Agreement or the subject matter hereof, the prevailing party shall be
entitled to recover, in addition to costs, reasonable attorney's fees.

Lessor:                                 Tenant/Lessee:
Diversified Business Services, Inc.,     Blazina, Risk & Associates, Inc.

       /s/ Carla Moreland                            /s/ Roger May
By: ------------------------------      By: ----------------------------------
         Carla Moreland                                Roger May

               President                           [ILLEGIBLE} -- Director
Title: ---------------------------      Title: -------------------------------

                2/28/00                                  2/14/2000
Date: ----------------------------      Date: --------------------------------

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     5 of 5
<PAGE>

                               SUBLEASE AGREEMENT

      This Lease Agreement is made on this 14th day of February, 2000, at
Newport Beach, California between DIVERSIFIED BUSINESS SERVICES, INC.
(hereinafter "Lessor" or "DBS") and, Advanced Communication Technologies, Inc.
(hereinafter "Lessee" or "Tenant).

                                   I. Premises

      DBS hereby leases to Lessee and Lessee hereby hires from DBS, the property
hereinafter referred to as the "subject premises" located in the City of Irvine,
County of Orange, State of California, and more particularly described as 19200
Von Karman Avenue, Suite 500, Office Nos. 10/11/12/32 (Exhibit "A").

                                    II. Term

      The term of this Lease shall be for 12 months, commencing on the 1st day
of April, 2000, and ending on the 30th day of September, 2000. Said rental term
shall be automatically extended for the same period and all provisions
applicable to the initial lease term shall apply to the extended lease term(s)
with the exception of renewal rate, unless Lessee gives Lessor or Lessor gives
Lessee written notice of cancellation of this renewal provision at least thirty
(30) days prior to the expiration of any lease term. For the purpose of
interpretation, a thirty day notice specifically means on or before the first
day of the last month of occupancy.

                             III. Rent & Rent Deposit

      Tenant shall pay as rent to DBS the sum of Five Thousand Five Hundred
Twenty-Five & 00/000 Dollars ($5525.00) as the first month's rent and the sum of
Five Hundred Twenty-Five & 00/000 Dollars ($5525.00) as a deposit against
payment of rent for the last month of occupancy under this Sublease Agreement;
thereafter, on or before the first day of each succeeding month, Lessee shall
pay the sum of Five Thousand Five Hundred Twenty-Five & 00/000 Dollars
($5525.00).

      In the event payment of rent is made after the fifth (5) day of the month,
an automatic late charge of 10% ($ 552.50) will be charged and must be included
with rental payment. A $25 charge will be paid by the Lessee to the Lessor for
each returned check.

      The deposit for payment of the final month's rent provided for hereunder
may be used by Lessor for any purpose, free of trust, and no interest shall be
paid to Lessee thereon.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     1 of 5
<PAGE>

                                 IV. Set-Up Fee

      Lessee acknowledges that Lessee has inspected the subject premises prior
to taking occupancy and that the subject premises are clean and in good repair.
On or before occupancy, Lessee shall pay Lessor the sum of -- 00/000 -- Dollars
($ n/c) for payment of expenses incurred by Lessor for door sign(s), directory
signs, keys, and general administrative set-up of account.

                               V. Use of Premises

      The subject premises shall be used by Lessee as a business office and for
uses normally incident thereto and for no other purpose. Lessee shall allow no
hazardous or noxious materials to be stored at the subject premises and Lessee
shall allow no activities on the subject premises which are illegal or otherwise
constitute a nuisance or disturbance to other tenants of the building.

                         VI. Covenants of Tenant/Lessee

      Tenant covenants and agrees to pay each monthly installment of rent
provided for herein on or before the due date, to use the subject premises for
the purpose hereinabove stated, and to surrender the subject premises, together
with appropriate office and building keys, upon the termination of tenancy in as
good condition as existed at the date of initial occupancy, reasonable wear and
tear excepted.

      (a) Default: The occurrence of any of the following shall constitute a
material default and breach of this Lease by Lessee: 1) Any failure by Lessee to
pay rent or to make any other payments required to be made by Lessee hereunder,
after written notice; 2) The abandonment or vacation of the Premises by Lessee,
bankruptcy of Lessee, or assignment for benefit of creditors; 3) A failure by
Lessee to observe and perform any other provision of this Lease to be observed
or performed by Lessee, where such failure continues for thirty (30) days after
written notice thereof by Lessor to Lessee.

      In the event of any such default by Lessee, then in addition to any other
remedies available to Lessor at law or in equity, Lessor shall have the
immediate option to terminate this Lease and all rights of Lessee hereunder by
giving written notice of such intention to terminate. In the event that Lessor
shall elect to so terminate this Lease then Lessor may recover from Lessee any
unpaid rent plus interest on said unpaid rental at the rate often percent (10%)
per annum.

      In the event of any such default by Lessee, Lessor shall also have the
right, with or without terminating this Lease, to re-enter the Premises and
remove all persons and property from the Premises; such property may be removed
and stored in a public warehouse or elsewhere at the cost of and for the account
of Lessee.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     2 of 5
<PAGE>

      (b) Abandonment: Lessee shall not vacate or abandon the premises at any
time during the term and if Lessee shall abandon, vacate or surrender said
premises for a period of thirty (30) days or be dispossessed by process of law,
or otherwise, any personal property belonging to Lessee and left on the premises
shall be deemed to be abandoned.

      (c) Keys: Lessee shall receive one key for each office leased and one key
for entry into main office. Lessee shall pay to Lessor the sum of $5.00 for each
key not returned at the expiration of this Lease, or for any additional
duplicate keys provided to Lessee. Tenant shall not alter any lock or install
additional locks or bolts on any door.

      (4) Rules & Regulations: Lessee agrees to observe and comply with the
Building Rules and Regulations as specified on Exhibit "D-1" and the Parking
Rules and Regulations as specified on Exhibit "D-2" attached hereto.

      (e) Lessor's Employees: Should Lessee elect to hire any of Lessor's
employees, during tenancy and/or for a one (1) year period following vacancy of
premises, a fee shall be paid to Lessor in the amount of $10,000.00 per employee
as compensation for Lessor's loss thereof unless Lessor does not intend to
retain said employee(s).

      (f) Copy Equipment: Lessee may maintain their own "desktop" copy equipment
inside the leased office. Free-standing machines and/or machines that require
additional electricity or dedicated circuitry are not permitted. Lessee also
agrees not to allow or solicit other clients on the premises to use Lessee's
copy equipment.

                          VII. Covenants of DBS/Lessor

      Lessor agrees to pay for all utilities (excepting local and long distance
telephone service, which shall be billed separately as specified under Article
VIII) and janitorial service.

      Rental payment includes telephone answering and reception services during
business hours (8 a.m. to 5 p.m.) Monday through Friday, use of the conference
room(s) by Tenant as reserved on an as-needed basis, and coffee service.

      DBS shall provide office support services Monday through Friday during
business hours; a separate statement for those services based on the then
current rate sheet (Exhibit "B") shall be rendered at the end of each month and
is due and payable upon presentation. As charges represent costs for labor and
materials (such as postage, shipping charges, stationary supplies, local and
long distance telephone service, parking validations, etc.) that have been
incurred by DBS on behalf of the Lessee/Tenant during the previous monthly
accounting period; payment is due no later than the 10th day of each month
following presentation of this statement.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     3 of 5
<PAGE>

                        VIII. Telephone Equipment/Service

      Lessee shall pay for the installation and all charges pertaining to
Lessee's telephone service. Lessee shall pay directly to Lessor the cost of
connecting Lessee's telephone equipment and service (Exhibit "C") and the
monthly charges for telephone equipment, and all associated local and long
distance charges (a copy of these charges will be provided with the monthly
office services invoice).

                     IX. Insurance & Personal Property Taxes

      Tenant shall be responsible to provide insurance protection of personal
property and liability within the subject premises and shall hold DBS harmless
from any claim arising out of events occurring within the confines of the
subject premises. DBS shall provide liability insurance for the common areas
providing access to the subject premises for Tenant and Tenant's business
invitees. Lessee is responsible for payment of all taxes levied or assessed on
Lessee's personal property.

                                X. Superior Lease

      The parties hereby acknowledge that this Sublease Agreement is subordinate
to a Superior Lease. The building in which the subject premises is located is
owned by Atrium Irvine Limited Partnership. DBS has entered into a written lease
with Atrium Irvine Limited Partnership and Diversified Business Services, Inc.
dated February 2, 1995. The parties mutually acknowledge that this Sublease
Agreement is entered into with the knowledge of aforesaid Superior Lease. The
parties, and each of them, represent that they will do no act with respect to
the subject premises which would violate the terms of the Superior Lease as
defined in Exhibits D-1 and D-2.

                           XI. Successors and Assigns

      The covenants and conditions herein contained shall be subject to the
provisions as to assignment, apply to and bind the heirs, successors, executors,
administrators and assigns of the parties hereto.

                                XII. Miscellaneous

      1. This Lease Agreement is entered into in the State of California and
shall be interpreted in accordance with the laws of the State of California.

      2. This Lease Agreement constitutes the entire Agreement of the parties
with respect to the subject matter hereof.

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     4 of 5
<PAGE>

      3. This Lease Agreement may not be modified except in writing signed by
both parties.

      4. in the event of any litigation between the parties arising out of this
Lease Agreement or the subject matter hereof, the prevailing party shall be
entitled to recover, in addition to costs, reasonable attorney's fees.

      5. Upon execution, this Sublease Agreement shall replace and supercede any
and all previous agreement in their entirety.

Diversified Business Services, Inc.,   Tenant/Lessee:
                                       Advanced Communication Technologies, Inc.

       /s/ Carla Moreland                            /s/ Roger May
By: ------------------------------      By: ----------------------------------
         Carla Moreland                                Roger May

               President                           Chief Executive Officer
Title: ---------------------------      Title: -------------------------------

                3/31/00                                  2/14/2000
Date: ----------------------------      Date: --------------------------------

                                                                  Initials:
                                                                  Lessee: /s/ RM
                                                                         -------
                                                                  Lessor: /s/ CM
                                                                         -------

                                     5 of 5
<PAGE>

================================================================================

                        National Service Industries, Inc.

                                6% Notes Due 2009

                                      NSI

                                   ----------

                              PROSPECTUS SUPPLEMENT

                                January 21, 1999

                              (Including Prospectus
                            dated September 8, 1998)

                                   ----------

                              Salomon Smith Barney

                              Goldman, Sachs & Co.

                                J.P. Morgan & Co.

================================================================================Exhibit 10.2

                            STOCK PURCHASE AGREEMENT

      This STOCK PURCHASE  AGREEMENT (the  "Agreement") is made and entered into
this  5th  day  of  April,   2000,  by  and  between   ADVANCED   COMMUNICATIONS
TECHNOLOGIES, INC., a Florida corporation ("ACT-US") and ADVANCED COMMUNICATIONS
TECHNOLOGIES PTY LTD, an Australian corporation ("ACT-Australia").

                                    RECITALS

      WHEREAS,  ACT-US is a Florida  Corporation  that is publicly traded on the
OTC Bulletin Board, administered by NASDAQ, under the ticker symbol "ADVC"; and

      WHEREAS,  ACT-Australia  is an  Australian  corporation  that owns certain
rights to a new wireless communications network technology, to be marketed under
the  name  Universe  Wide  Spectrum   Cellular-"Spectrucell"  (the  "SpectruCell
Technology"); and

      WHEREAS, the Parties have entered into a Memorandum of Understanding dated
February  15,  2000,  whereby  ACT-US will  acquire  20% of the common  stock of
ACT-Australia; and

      WHEREAS,  the parties desire to enter into this Agreement to formalize the
purchase  contemplated  by the  Memorandum of  Understanding  upon the terms and
conditions contained herein.

                                    AGREEMENT

      NOW,  THEREFORE,  in  consideration  of the mutual  promises and covenants
herein contained, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby  acknowledged,  the parties and their  successors
agree as follows:

      1. Recitals.  The foregoing recitals are true and correct in every respect
and are hereby incorporated herein by reference,

      2. Definitions.  In addition to the terms defined  elsewhere  herein,  the
terms defined in the  introductory  paragraph and the Recitals to this Agreement
shall have the respective meanings specified therein or below, and the following
terms shall have the  meanings  specified  below when used  herein with  initial
capital letters:

            "Adverse  Consequences"  means  all  actions,  suits,   proceedings,
claims, damages, penalties, fines, costs, reasonable amounts paid in settlement,
liabilities,  losses,  expenses,  and fees, including court costs and reasonable
attorney's fees and expenses.

            "Affiliate"  means any person who,  with respect to a certain  other
person, controls that other person, or is controlled by that other person, or is
controlled by that same

<PAGE>

third  person who controls  the other  person,  in each case whether or not such
control is direct or indirect through one or more intermediaries.

            "Closing  Date"  means the later to occur of both the  execution  of
this Agreement and the performance of any conditions precedent to either party's
performance hereunder.

            "Governmental   Entity"   means  any   court,   arbitral   tribunal,
administrative   agency  or  commission  or  other  governmental  or  regulatory
authority or agency.

            "Purchase Price" means 5,000,000  restricted shares of ACT-US common
stock and $7,500,000 US as further described in Section 3 herein.

            "Transferred  Shares: means 20% of the issued and outstanding shares
of stock of ACT-Australia existing at the Closing Date.

      3. Purchase of Transferred Shares.

            (a) ACT-US hereby agrees to acquire the  Transferred  Shares for the
Purchase Price. The Purchase Price shall be paid as follows:

            (i) Certificates for 5,000,000 shares of restricted  common stock of
      ACT US shall be  delivered to  ACT-Australia  as set forth in Section 3(e)
      herein; and

            (ii)  $7,500,000 US to be paid in three equal monthly  installments,
      without  interest,  commencing  on May 31, 2000 (the "Cash  Portion of the
      Purchase  Price").  ACT-US shall be entitled to offset any amounts owed to
      it by ACT-Australia against the Cash Portion of the Purchase Price.

            (b) ACT-Australia  hereby agrees to sell and deliver the Transferred
Shares to ACT-US for the Purchase Price as set forth in Section 3(e) herein.

            (c)  ACT-Australia  merges  or  consolidates  with any  entity  that
survives the merger or consolidation,  ACT-Australia and its shareholders  shall
cause the surviving entity to issue and deliver the Transferred Shares to ACT-US
pursuant to the terms herein.

            (d) The parties acknowledge and agree that ACT-US shall use its best
efforts to raise the Cash  Portion  of the  Purchase  Price  through a public or
private  offering  of  securities.  ACT  Australia  hereby  agrees to extend the
monthly  installment  payment  deadlines,  without interest,  to allow ACT-US to
raise the Cash Portion of the Purchase Price. The parties  acknowledge and agree
that upon raising funds  pursuant to a public or private  offering of securities
ACT-US shall only be obligated to transfer to  ACT-Australia as part of the Cash
Portion of the Purchase Price those funds  remaining after deduction of reserves
needed for current operations, working capital and the development and expansion
of its operations and the

<PAGE>

operations of its subsidiaries, as determined by its Board of Directors.

            (e)  Within 15 days  after the  Closing  Date,  ACT-US  shall  issue
certificates for 5,000,000 shares of restricted common stock to ACT-Australia in
denominations requested by ACT-Australia,  which certificates shall be delivered
to and held in escrow by Jack Halperin,  Esq., counsel for ACT-US.  Upon receipt
by him of  the  Transferred  Shares,  he  will  transfer  the  certificates  for
5,000,000  shares of ACT-US common stock to  ACT-Australia  and the  Transferred
Shares to ACT-US.

      4.   Representations   and  Warranties  of  ACT-Australia.   ACT-Australia
represents and warrants to ACT-US as follows:

            (a)  Organization.  ACT-Australia  is a corporation  duly organized,
validly  existing,  and in good standing  under the laws of  Australia,  is duly
authorized  under  Australia law to carry on its  business(7)  has all requisite
corporate power and authority to own,  lease,  and operate its properties and to
carry on its business as now being conducted. ACT-Australia is duly qualified or
licensed to do business and is in good  standing in each  jurisdiction  in which
the  property  owned,  leased,  or operated by it or the nature of the  business
conducted by it makes such qualification or licensing unnecessary.

            (b) Transferred  Shares.  ACT-Australia shall deliver to ACT-US good
and  marketable  title to the  Transferred  Shares  free and clear of all liens,
trusts, claims, charges,  security agreements and other encumbrances of any kind
or nature whatsoever.

            (c) No Consents.  Neither the execution,  delivery or performance of
this  Agreement  nor  the  consummation  by  ACT-Australia  of the  transactions
contemplated  hereby  require  any filing  with,  or  authorization,  consent or
approval of any Governmental Entity, notices, filings, authorizations,  consents
and approvals which if not obtained or made would have a material adverse effect
to ACT-Australia or materially impair the ability of ACT-Australia to consummate
the transactions contemplated by this Agreement.

            (d) Authority.  ACT-Australia has all requisite  corporate power and
authority to execute and deliver this  Agreement and to carry out its obligation
hereunder.  The execution and delivery of this Agreement and the consummation of
the transactions  contemplated hereby have been duly authorized by alt necessary
corporate action on the part of  ACT-Australia,  including  authorization by its
Board of Directors,  and this  Agreement has been duly executed and delivered by
ACT-Australia  and  constitutes  the valid and  legally  binding  obligation  of
ACT-Australia,  enforceable  against it in accordance with its terms,  except as
enforceability   may  be   limited   by   applicable   bankruptcy,   insolvency,
reorganization,  moratorium,  rehabilitation(7)  or similar laws  affecting  the
enforcement of creditors' rights generally.

            (e) No  Violations.  Neither  the  execution  and  delivery  of this
Agreement nor the consummation of the transactions  contemplated hereby will (i)
violate any statute,  regulation,  rule,  injunction,  judgment,  order, decree,
ruling(1) charge or other  restriction  of  any  Governmental  Entity  to  which
ACT-Australia is subject; (ii) conflict with or result in the breach

<PAGE>

of any provision of  ACT-Australia's  charter or bylaws or (iii)  conflict with,
result  in a  breach  of,  or  constitute  a  default  under  any of the  terms,
conditions or provisions of any material agreement or obligation to which

ACT-Australia may be bound or to which any of the assets of ACT-Australia may be
subject.

            (f) Ownership of SpectruCell. ACT-Australia has all right, title and
interest  in and to the  Spectrucell  Technology,  and  its  development  of the
Spectrucell  Technology  does not  infringe  any third  party's  patent or other
rights.  Further,  ACT-Australia  owns 70% of the  outstanding  common  stock of
Australian Enterprises Pty Ltd

            (g) Financial Statements. To the extent available, ACT-Australia has
made available to ACT-US for inspection complete copies of the unaudited balance
sheets and operating (profit and loss) statements of ACT-Australia as at and for
December 31, 1999 (collectively, the "Statements"),  including the Balance Sheet
of the Company as at December 31, 1999 (the "Effective Date Balance Sheet"). The
Statements,  including the Effective Date Balance Sheet correctly and accurately
present the financial  position and results of operations of ACT-Australia as of
the dates and for the periods covered by such Statements.

            (h) The  Recitals  to this  Agreement  are true and  correct  in all
material respects.

      5. Representations and Warranties of ACT-US.  ACT-US hereby represents and
warrants to ACT-Australia as follows:

            (a)  Organization.  ACT-US is a corporation duly organized,  validly
existing,  and in good standing  under the laws of Florida,  is duly  authorized
under Florida law to carry on its business as presently being conducted, has all
requisite  corporate  power  and  authority  to  own,  lease,  and  operate  its
properties  and to carry on its business as now being  conducted and as proposed
to be conducted and consummate this Agreement.

            (b) ACT-US Shares.  ACT-US shall deliver to  ACT-Australia  good and
marketable  title to its shares to be  transferred  pursuant to this  Agreement,
free and clear of all liens, trusts,  claims,  charges,  security agreements and
other encumbrances of any kind or nature  whatsoever,  provided that such shares
shall bear a restricted legend.

            (c) No Consents.  Neither the execution,  delivery or performance of
this  Agreement  of ACT-US nor the  consummation  by ACT-US of the  transactions
contemplated  hereby  require  any filing  with,  or  authorization,  consent or
approval of any Governmental Entity except for notices, filings,  authorizations
consents and approvals which if not obtained or made would not materially impair
the  ability  of ACT-US to  consummate  the  transactions  contemplated  by this
Agreement.

            (d)  Authority.   ACT-US  has  all  requisite  corporate  power  and
authority to execute and deliver this  Agreement and to carry out its obligation
hereunder.  The execution and delivery of this Agreement and the consummation of
the transactions contemplated hereby have

<PAGE>

been duly  authorized by all necessary  corporate  action on the part of ACT-US,
including  authorization by its Board of Directors,  and this Agreement has been
duly  executed  and  delivered by ACT-US and  constitutes  the valid and legally
binding  obligation of ACT-US,  enforceable  against it in  accordance  with its
terms,  except  as  enforceability  may be  limited  by  applicable  bankruptcy,
insolvency,   reorganization,   moratorium,   rehabilitation,  or  similar  laws
affecting the enforcement of creditors' rights generally.

            (e) No  Violations.  Neither  the  execution  and  delivery  of this
Agreement nor the consummation of the transactions contemplated hereby, will (a)
violate any statute,  regulation,  rule,  injunction,  judgment,  order, decree,
ruling,  charge or other restriction of any Governmental  Entity to which ACT-US
is subject; (b) conflict with or result in the breach of any provision of either
ACT-US's  charter  or bylaws or (c)  conflict  with,  result in a breach  of, or
obligation  to which either  ACT-US may be bound,  except  where the  violation,
conflict(1)  breach or default would not materially impair such ACT-US's ability
to consummate the transactions contemplated by this Agreement.

            (f)  Business  of  ACT-US.  The  business  of ACT-US  is  accurately
described  in the  Current  Report on Form 8-K of ACT-US  filed  with the United
States Securities and Exchange Commission on February 4, 2000, as amended and/or
supplemented by subsequent filings.

      6. Board of Directors of  ACT-Australia.  ACT-US shall be entitled,  on an
ongoing basis,  to appoint one person (other than Roger May) to  ACT-Australia's
Board of Directors, which person shall be elected as a Director of ACT-Australia
at its annual meetings.

      7 Certain Covenants of the Parties.

            (a) Reasonable Efforts. Each of the Parties shall use all reasonable
efforts to take all actions and to do all things necessary, proper, or advisable
in order to consummate and make effective the transactions  contemplated by this
Agreement. Each of the Parties shall execute such other agreements and documents
as may be necessary or desirable to effectuate the intent of this Agreement.

            (b)  Expenses.  Each of the  Parties  shall  pay its own  costs  and
expenses incurred in connection with the preparation of and consummation of this
Agreement and the transactions contemplated hereby. The Parties acknowledge that
no tiling under the H-S-R Act is required in connection with this transaction.

      8. Survival: Indemnification.

            (a)  Survival  of  Representations   and  Warranties.   All  of  the
representation  and warranties of ACT Australia and of ACT-US  contained  herein
shall continue in full force and effect for 3 years after the Closing Date.

            (b)  Indemnification  Provisions for Benefit of ACT-US. In the event
ACT-Australia  breaches (i) any of its representations and warranties  contained
in Section 4 of this

<PAGE>

Agreement or (ii) any of their covenants contained in this Agreement, and ACT-US
shall have delivered a written notice setting forth with  reasonable  detail the
amount and basis for any claim (a "Claim  Notice") to  ACT-Australia  before the
3rd anniversary date of the Closing Date,  then, if  ACT-Australia  fail to cure
such  breach  within  30  days  following  the  aforementioned  written  notice,
ACT-Australia   agrees  to  indemnify   ACT-US  from  and  against  any  Adverse
Consequences ACT-US may suffer which are caused proximately by the breach.

            (c) Indemnification Provisions for Benefit of ACT -Australia. In the
event ACT-US breaches (i) any of its representations and warranties contained in
Section  5 of this  Agreement  or (ii) any of its  covenants  contained  in this
Agreement,  and  ACT-Australia  shall have  delivered  a Claim  Notice to ACT-US
before the 3rd  anniversary  date of the Closing  Date,  then  ACT-US  agrees to
indemnify ACT-Australia from and against any Adverse Consequences  ACT-Australia
may suffer which are caused proximately by the breach.

      9.  Notices.  All  notices,  requests,  demands  and other  communications
hereunder  shall be in writing  and shall be deemed to have been duly  delivered
and received when hand  delivered,  telecopied,  faxed,  delivered by courier or
five days after such notice is mailed by certified or registered  mail,  postage
prepaid and return receipt requested,  to the address set forth below or to such
other  address of which any party may have given notice in  accordance  with the
terms hereof:

            If to the Corporation:

               Advanced Communications Technologies, Inc.
               Attn: Roger May
               19200 Von Karman Avenue
               Suite 500, Office #32
               Irvine, CA 92604
               Facsimile: (949) 477-8022

            With a copy to:

               Levinson & Lichtman, LLP
               Attn: Jonathan J. Lichtman, Esq.
               Sanctuary Centre Suite D-l00
               4800 North Federal Highway
               Boca Raton, FL 33431
               Facsimile: (561) 447-0018

<PAGE>

            If to ACT-Australia:

               Advanced Communications Technologies, Inc.
               Attn: Graeme Shearer
               350 Queen Street, 20th Floor
               Melbourne, VIC 3000
               Australia
               Facsimile: (011) 613 9672 8857 or 8800

            With a copy to.

               Mr. Roger May
               19200 Von Karman Avenue
               Suite 500, Office #32
               Irvine, CA 92604
               Facsimile: (949) 477-8022

      10.  Review with  Counsel.  Each of the  parties  signing  this  Agreement
acknowledges  that each of them have had an opportunity to review this Agreement
with its attorney and to consult with its attorney  concerning the terms of this
Agreement.

      11. Miscellaneous Provisions.

            (a) This Agreement will be governed by and construed and enforced in
accordance  with the laws of the  State of  Victoria,  Australia.  Venue for any
action brought hereunder shall be in Melbourne, Victoria.

            (b) The Section headings contained herein are for reference purposes
only and will not in any way  affect  the  meaning  and  interpretation  of this
Agreement.

            (c) This  Agreement  will be binding  upon and will  operate for the
benefit of the  parties to this  Agreement  and their  respective  heirs,  legal
representatives and successors.

            (d) This Agreement  contains the entire agreement of the parties and
all prior  understandings  and agreements,  whether written or oral, between the
parties  are merged  into this  Agreement.  This  Agreement  cannot be  altered,
amended, supplemented,  modified, assigned or terminated except by an instrument
in writing signed by all of the parties to this Agreement.

            (e)  Should it become  necessary  for any party to  institute  legal
action to enforce the terms and  conditions of this  Agreement,  the  successful
party will be awarded reasonable  attorneys' fees, which will include reasonable
attorneys'  fees  for  any  appellate  proceedings,   expenses,   including  any
accounting expenses, and costs.

            (f) the invalidity or unenforceability  of any particular  provision
of

<PAGE>

this Agreement will not affect the other  provisions of this Agreement,  and the
Agreement will be construed in all respects as if such invalid or  unenforceable
provisions were omitted.

            (g)  This  Agreement  will be  signed  and  executed  in one or more
counterparts, each of which will be deemed an original and all of which together
shall  constitute  one  agreement.  Faxed  signatures  shall be deemed  original
Signatures for purposes of execution of this Agreement.

            (h) The parties expressly represent, acknowledge and agree that this
Agreement was negotiated and entered into on an  arms-length,  equal  bargaining
power basis and not under duress of any kind whatsoever. The preparation of this
Agreement  has been a joint  effort  of the  parties  hereto  and the  resulting
document shall not,  solely as a matter of judicial  Construction,  be construed
more severely against one of the parties than the other.

            (i) The parties will execute and deliver such further  documents and
take such  further  actions as may  reasonably  be  requested by counsel for any
party in order to more fully carry out the intentions of this Agreement.

            (j) All  references  to sums of money  contained  in this  Agreement
shall be in United States dollars.

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

WITNESSES:

                                     ADVANCED COMMUNICATIONS
------------------------------         TECHNOLOGIES, INC.

------------------------------       By: /s/ Roger May
                                         ----------------------------------
                                         Roger May, Chief Executive Officer

                                     ADVANCED COMMUNICATIONS
------------------------------       TECHNOLOGIES, INC.

------------------------------       By: /s/ Graeme Shearer
                                         ----------------------------------
                                         Graeme Shearer, Chief Financial Officer

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