EXHIBIT 10.9
                                                                    ------------
                              EMPLOYMENT AGREEMENT
                              --------------------

         THIS EMPLOYMENT AGREEMENT between SBA COMMUNICATIONS
CORPORATION,  a Florida corporation with its principal place of business at 6001
Broken Sound Parkway,  Suite 400, Boca Raton, Florida (the "Company") and ROBERT
M. GROBSTEIN (the  "Executive"),  is made and entered into as of this 1st day of
January, 1997.

                              W I T N E S S E T H:
                              --------------------

         WHEREAS,  the Company and its  subsidiaries  engage in the  business of
developing, leasing and maintaining wireless telecommunications tower sites; and

         WHEREAS,  the  Executive  and  the  Company  wish  to  provide  for the
employment of the Executive by the Company on the terms and conditions set forth
in this Agreement.

         NOW,  THEREFORE,  it is hereby  agreed by and  between  the  parties as
follows:

     1. EMPLOYMENT. The Company hereby agrees to employ the Executive and the
        ----------
Executive hereby agrees to be employed by the Company on the terms and
conditions set forth herein.

         2. TERM. The initial term of employment of the Executive by the Company
            -----
hereunder  shall  commence as of January 1, 1997 and shall end December 31, 1999
(the "Term"),  unless sooner terminated as hereinafter  provided.  At the end of
such initial Term, this Agreement shall be extended automatically for successive
one (1) year Terms of  employment,  unless  either the Company or the  Executive
notifies  the other party in writing at least  ninety (90) days prior to the end
of the incumbent  Term of any intention  not to renew this  Agreement,  in which
case this  Agreement  will  terminate  at the end of such  incumbent  Term.  All
references herein to the Term shall refer to both such initial Term and any such
successive Terms.

         3.  POSITION  AND  DUTIES.  The  Executive  shall  serve  as the  Chief
             ----------------------
Financial  Officer  of the  Company.  The  Executive  shall  perform  the duties
generally  of a chief  financial  officer  for the  Company  and shall have such
specific responsibilities,  duties and authorities as shall from time to time be
assigned  by the  Chief  Executive  Officer  or the  Board of  Directors  of the
Company.  The  Executive  shall  devote  substantially  all his working time and
efforts to the business and affairs of the Company and its subsidiaries.

         4.       COMPENSATION AND RELATED MATTERS. 
                  --------------------------------

                  (a) Salary.  During the period of the  Executive's  employment
                      ------
hereunder,  the Executive shall be paid an annual salary at a rate determined by
the Board of Directors  of the Company of not less than  $200,000 per annum (the
"Base  Salary").  The Base  Salary  shall  be paid in  monthly  or  semi-monthly
installments  as shall be the  practice of the  Company,  and may be paid by the
Company or any of its subsidiaries. Compensation of the Executive by payments of
Base Salary shall not be deemed  exclusive  and shall not prevent the  Executive
from participating in any

                                                    

 
other compensation or benefit plan of the Company or its subsidiaries.  The term
"Base Salary" shall be deemed to include any and all regular installment amounts
received by the Executive  under this  Agreement.  The Board of Directors of the
Company,  in its sole discretion,  may from time to time authorize  increases in
the Base Salary.

                  (b)  Bonuses.  In addition  to the Base Salary  payable to the
                       --------
Executive  hereunder,  the  Executive  shall  be  entitled  to  receive  a bonus
hereunder  for each  calendar  year to the  extent  earned  in  accordance  with
performance   targets,   measurements  and  such  other  criteria  as  shall  be
established  for such year by the Board of Directors of the Company on or before
March 31 of such year.  In no event shall the annual amount of bonus paid to the
Executive  pursuant  to this  Section  4(b) be an amount  greater  than the Base
Salary paid to Executive for such year.

                  (c) Expenses.  During the Term of the  Executive's  employment
                      ---------
hereunder,  the Executive shall be entitled to receive payment or  reimbursement
for all  reasonable  expenses  incurred by the Executive in performing  services
hereunder,  including all expenses of travel and living expenses while away from
home on  business  or at the request of and in the service of the Company or its
subsidiaries and including dues and seminar fees (including, without limitation,
the cost of seminars,  educational courses and license fees not to exceed $5,000
per annum necessary for the Executive to maintain his active status as a Florida
certified  public  accountant);  provided  that such  expenses  are incurred and
accounted  for in accordance  with the policies and  procedures  then  presently
established by the Company.

                  (d)  Other  Benefits.  The  Executive  shall  be  entitled  to
                       ---------------
participate  in  or  receive   benefits  under  any  employee  benefit  plan  or
arrangement  made available by the Company or its  subsidiaries in the future to
its  executives  and  key  management  employees,  subject  to  and  on a  basis
consistent with the terms,  conditions and overall  administration of such plans
and arrangements. Any payments or benefits payable to the Executive hereunder in
respect of any  calendar  year  during  which the  Executive  is employed by the
Company for less than the entire such year shall,  unless otherwise  provided in
the applicable plan or arrangement, be prorated in accordance with the number of
days in such calendar year during which he is so employed.

                  (e) Group or Family Medical Coverage.  The Company shall cause
                      --------------------------------
to be provided at its expense group or family medical insurance  coverage to the
Executive and his dependents  under a plan for employees of the Company and such
plan shall include reasonable coverage for medical, hospital, surgical and major
medical expenses and shall be subject to such deductibles as applicable to other
Company employees.

         5. LEGAL REQUIREMENTS. Both the Executive and the Company agree that
            ------------------
all legal requirements shall be met with respect to United States Federal and
foreign (if applicable) withholding tax requirements, compensation income and
the like.


                                      - 2 -

 
     6.  TERMINATION.  Unless  otherwise agreed to in writing by the Company and
         -----------
the Executive,  the Executive's employment hereunder may be terminated under the
following circumstances:

                  (a)      Death.  The Executive's death.
                           -----

                  (b) Disability.  If, as a result of the Executive's incapacity
                      ----------
due to physical or mental  illness  (such  incapacity  being  determined  by the
Company in its sole reasonable discretion), the Executive shall have been absent
from his  full-time  duties as described  hereunder for the entire period of six
(6) consecutive  months,  the Company may terminate the  Executive's  employment
hereunder.

                  (c)      Cause.
                           -----

                           (i)      The Company may terminate the Executive's
employment  hereunder for Cause.  For purposes of this Agreement,  "Cause" shall
mean  that  (i) the  Executive  is  convicted  of a  felony  which,  in the sole
determination  of the  Company,  would  have a  material  adverse  effect on the
Executive's  ability  to perform  his duties  hereunder  or on the  business  or
reputation of the Company;  (ii) the Executive  has exhibited  gross  misconduct
resulting in material harm to the Company, its business or reputation; (iii) the
Executive  has  willfully   misappropriated  Company  assets  or  has  otherwise
willfully  defrauded the Company,  including without limitation by fraud, theft,
embezzlement,  or breach of a fiduciary duty involving personal profit; (iv) the
Executive has  intentionally  failed to perform his duties  hereunder;  or (v) a
breach of any  provision  of this  Agreement.  For the  purposes of this Section
6(c)(i),  no act or failure to act on the  Executive's  part shall be considered
"willful"  unless  done,  or  omitted  to be done,  by him not in good faith and
without  reasonable belief that his action or omission was in the best interests
of the Company.

                           (ii)     Notwithstanding the foregoing, any
termination  of the Executive  shall not be  considered a termination  for Cause
pursuant to this Section 6(c),  and shall be  considered a  termination  Without
Cause pursuant to Section 6(d) hereof,  if such termination is effected without:
(1)  reasonable  notice  to the  Executive  setting  forth the  reasons  for the
Company's  intention  to  terminate  for  Cause;  (2)  an  opportunity  for  the
Executive,  together with his counsel, to be heard before the Board of Directors
of the Company;  and (3) delivery to the Executive of a Notice of Termination as
provided  for in Section 8 hereof  from the Board of  Directors  of the  Company
finding that in the good faith  opinion of the Board of Directors of the Company
the Executive  was guilty of conduct set forth above in the preceding  sentence,
and specifying the particulars thereof in detail.

                  (d) Without  Cause.  Any  termination  of the Executive by the
                      --------------
Company  (including  any action which is deemed a  termination  of the Executive
pursuant to Section 6(f) hereof),  other than a termination pursuant to Sections
6(a)-(c) hereof, shall be deemed a termination Without Cause.


                                      - 3 -

 
                  (e) Termination by the Executive.  The Executive may terminate
                      ----------------------------
this  Agreement  (i)  due to  the  Executive's  retirement;  provided  that  the
Executive provide the Company with thirty (30) days written notice,  pursuant to
Section 8(a), prior to the effective date of such retirement, as shall be stated
in such notice,  and (ii) for any reason other than the Executive's  retirement;
provided  that the  Executive  provide the Company  with sixty (60) days written
notice prior to the effective  date of such  termination,  as shall be stated in
such notice.

                  (f) Other Events of Termination.  The following  circumstances
                      ---------------------------
shall  specifically  be deemed a termination  Without  Cause of the  Executive's
employment by the Company:

     (i) a vote by the Board of  Directors to terminate  the  Executive  Without
Cause, as defined in Section 6(d) hereof;

     (ii) any  termination of the Executive's  employment  which is not effected
pursuant to a Notice of Termination  satisfying the requirements of Section 8(a)
hereof;

     (iii) a breach by the Company of this Agreement,  and a subsequent election
by the Executive to terminate this Agreement pursuant to Section 6(e) above;

     (iv) the  performance  of any other act by the Company which is designed to
prevent and does prevent the Executive from properly performing the authorities,
duties and  responsibilities  of his  employment  hereunder,  including  without
limitation a material  change in the duties or position of the Executive  within
the Company; or

     (v) a Change in Control (as defined below) of the Company.

                  (g) Change in Control. For purposes of this Agreement, "Change
                      -----------------
in Control"  shall,  unless the Board  otherwise  directs by resolution  adopted
prior  thereto,  be deemed to occur if (i) any "person" (as that term is used in
Sections 13 and 14(d)(2) of the Exchange Act),  other than Steven E.  Bernstein,
is or becomes the beneficial owner (as that term is used in Section 13(d) of the
Exchange Act),  directly or indirectly,  of twenty-five percent (25%) or more of
the  voting  stock;  or  (ii)  during  any  period  of  two  consecutive  years,
individuals  who at the beginning of such period  constitute the Board cease for
any reason to constitute at least a majority thereof, unless the election or the
nomination for election by the Company's  shareholders  of each new director was
approved by a vote of at least  three-quarters  of the  directors  then still in
office  who  were  directors  at  the  beginning  of  the  period.  Any  merger,
consolidation or corporate  reorganization  in which the owners of the Company's
capital  stock  entitled to vote in the election of directors  ("Voting  Stock")
prior to said  combination  own  fifty  percent  (50%) or more of the  resulting
entity's Voting Stock shall not, by itself, be considered a Change in Control.


                                      - 4 -

 
         7.       COMPENSATION UPON TERMINATION.
                  -----------------------------

                  (a) If the Executive's employment is terminated for any reason
pursuant to Section  6(d) hereof,  the Company  shall be obligated to pay to the
Executive  an  amount  equal  to the of the  product  of  (i)  the  Base  Salary
multiplied  by (ii) 2.0,  such payment to be made in a lump sum on or before the
fifth day following the Date of Termination; provided, however, that if the lump
sum severance  payment  under this Section  7(a),  either alone or together with
other  payments  which the  Executive has the right to receive from the Company,
would  constitute  a  "parachute  payment"  (as  defined in Section  280G of the
Internal Revenue Code of 1986, as amended (the "Code")), such lump sum severance
payment  shall be reduced to the largest  amount as will result in no portion of
the lump sum  severance  payment  under this Section  7(a) being  subject to the
excise  tax  imposed  by  Section  4999 of the Code.  The  determination  of any
reduction in the lump sum severance  payment under this Section 7(a) pursuant to
the foregoing  provision shall be made by independent  counsel to the Company in
consultation with the independent certified public accountants of the Company.

                  (b) If the  Executive's  employment is terminated  pursuant to
Sections 6(a),  6(b), 6(c) or 6(e) hereof,  on and after the Date of Termination
the  Company  shall no longer be  obligated  to pay the  Executive  any  amounts
payable  hereunder  for  such  period,  whether  in the form of Base  Salary  or
otherwise,  and the  Executive  shall  have no  right to  compensation  or other
benefits  hereunder  for any such period.  Notwithstanding  the  foregoing,  the
Company shall be obligated to pay to the Executive all amounts payable hereunder
and  otherwise,  through and  including  the Date of  Termination,  whether such
amounts were payable prior to the date of  termination  or  thereafter,  and the
Executive shall be entitled to receive any extension of benefits beyond the Date
of  Termination,  provided that (i) such benefits were received by the Executive
prior to the Date of Termination and (ii) such extension is customarily  offered
by the Company to its employees or is otherwise required by applicable law.

                  (c) Notwithstanding the foregoing or anything contained herein
to the contrary,  in no event shall the total amount of payments made under this
Agreement on account of  termination  under Section  6(f)(v) hereof exceed three
times the "base  amount"  minus one  dollar.  "Base  amount"  means the  average
annualized  compensation  income from the Company  includible in the Executive's
gross income for Federal income tax purposes over the five-year period preceding
the year in which the Executive's employment is terminated.  This paragraph, and
the language therein, shall be interpreted consistently with Section 280G of the
Internal Revenue Code of 1986, as amended, and any regulations thereunder.

         8.       NOTICE OF TERMINATION AND EFFECTIVE DATE.
                  ----------------------------------------

                  (a)  Any  termination  of the  Executive's  employment  by the
Company or by the  Executive  (other than  termination  pursuant to Section 6(a)
hereof) shall be  communicated  by written  Notice of  Termination  to the other
party hereto.  For purposes of this Agreement,  a "Notice of Termination"  shall
mean a notice which shall (i) indicate  the  specific  termination  provision in
this Agreement  relied upon;  (ii) set forth in reasonable  detail the facts and
circumstances claimed to

                                      - 5 -

 
provide  a  basis  for  termination  of the  Executive's  employment  under  the
provision so indicated; and (iii) contain any other information required by this
Agreement.

                  (b) For  purposes  of this  Agreement,  "Date of  Termination"
shall mean: (i) if the  Executive's  employment is terminated by his death,  the
date of his death; (ii) if the Executive's  employment is terminated pursuant to
Section  6(b)  hereof,  the  expiration  of six (6)  consecutive  months  of the
Executive's  incapacity  due to  physical  or  mental  illness,  as set forth in
Section 6(b) hereof  (provided that the Executive shall not have returned to the
performance  of his  duties  on a  full-time  basis  during  such six (6)  month
period);  (iii) if the Executive's employment is terminated pursuant to Sections
6(c) or 6(d) hereof,  the date that the Notice of Termination is communicated to
the  Executive  pursuant  to  Section  8(a)  hereof;  (iv)  if  the  Executive's
employment is terminated  pursuant to Section 6(e) hereof,  the termination date
stated  in the  written  notice  received  by  the  Company;  or  (v) if  deemed
terminated  pursuant to Section  6(f)  hereof,  the date of such action which is
deemed a termination of the Executive by the Company.

         9.  RESTRICTIVE  COVENANT.  Upon any cessation of employment  hereunder
             ---------------------
other than one pursuant to Sections 6(d) or 6(f), the Executive  agrees that for
the period  commencing on the Consummation  Date and ending on the date which is
two (2) years from the date the Executive is no longer  employed by the Company,
the Executive will not, directly or indirectly:

     (i) engage in any trade or business  directly  competitive with that of any
of the Company or any of its subsidiaries, anywhere in the United States or such
other country or countries in which the Company actively engages in its trade or
business as of the Date of Termination (the "Territory");

     (ii) become  associated  as a manager,  supervisor,  employee,  consultant,
advisor,  control shareholder  (either  individually or as part of an affiliated
group), or otherwise of any person,  corporation or entity engaging in any trade
or  business  directly  competitive  with  those  of the  Company  or any of its
subsidiaries anywhere in the Territory;

     (iii)  call  upon  any  client  or  clients  of the  Company  or any of its
subsidiaries   for  the  purpose  of  selling  or  soliciting  for  any  person,
corporation or entity, other than any of the Company or its subsidiaries,  sales
of any products,  processes,  or services directly competitive with those of the
Company within the Territory;

     (iv) divert, solicit or take away any such client or clients of the Company
or any of its  subsidiaries  for the purpose of selling any products or services
directly  competitive with those of the Company or any of its subsidiaries;  and
service any contracts or accounts  relating to any products or services directly
competitive  with those of the Company or any its  subsidiaries  for any person,
corporation or entity other than the Company or any of its subsidiaries; or

     (v)  induce,  influence,  combine or conspire  with,  or attempt to induce,
influence,  combine or conspire  with,  any of the  officers or employees of the
Company to terminate

                                      - 6 -

 
his or her employment with or to directly  compete  against the Company,  any of
its present or future  subsidiaries,  or any of the Company's  present or future
affiliates  about which the Executive  obtained any knowledge of the business or
operation of such affiliate during the Term of this Agreement.

The  provisions  of this Section 9 shall not apply to Employee in the event of a
termination of employment  hereunder  pursuant to Sections 6(d) or 6(f).  Should
any of the time  periods or the  geographic  area set forth in this Section 9 be
held to be unreasonable by any court of competent  subject matter  jurisdiction,
the parties  hereto  agree to  petition  such court to reduce the time period or
geographic area to the maximum permitted by governing law.

         10.      CONFIDENTIALITY.
                  ---------------

                  (a) In the course of this  employment,  the  Company or any of
its subsidiaries may disclose or make known to the Executive,  and the Executive
may be given access to or may become acquainted with, certain information, trade
secrets or both, including but not limited to confidential information and trade
secrets  regarding  tapes,  computer  programs,   designs,  skills,  procedures,
formulations, methods, documentation, drawings, facilities, customers, policies,
marketing,  pricing,  customer  lists  and  leads,  and  other  information  and
know-how, all relating to or useful in the Company's business or the business of
its subsidiaries and/or affiliates (collectively, the "Information"),  and which
the Company considers  proprietary,  desires to maintain confidential and is not
in the  public  domain.  During  the  Term of this  Agreement  and at all  times
thereafter,   the  Executive  shall  not  in  any  manner,  either  directly  or
indirectly, divulge, disclose or communicate to any person or firm, except to or
for the  Company's  benefit as directed by the Company,  any of the  Information
which he may have acquired in the course of or as an incident to his  employment
by  the  Company,  the  parties  agreeing  that  such  information  affects  the
successful and effective conduct of the Company's business and its goodwill, and
that any breach of the terms of this  Section  10 is a  material  breach of this
Agreement.

                  (b) All equipment,  documents,  memoranda,  reports,  records,
files,  materials,  samples,  books,  correspondence,  lists,  other written and
graphic  records,  and the like  (collectively,  the  "Materials")  affecting or
relating  to  the  business  of  the  Company  or  of  its  subsidiaries  and/or
affiliates, which the Executive shall prepare, use, construct,  observe, possess
or control shall be and remain the  Company's  sole property or in the Company's
exclusive  custody,  and must not be removed  from the  premises  of the Company
except as directed by the Company's Board of Directors in writing. Promptly upon
termination  of the Agreement or the  Executive's  employment  hereunder for any
reason, or otherwise upon request of the Chief Executive Officer of the Company,
the Information,  the Materials and all copies thereof in the custody or control
of the Executive shall be delivered to the Company.

         11. NOTICE. All notices,  requests,  consents and other  communications
             ------
required  or  permitted  under this  Agreement  shall be in  writing  (including
electronic  transmission)  and shall be (as  elected by the person  giving  such
notice) hand delivered by messenger or courier service,

                                      - 7 -

 
electronically  transmitted,  or mailed (airmail if international) by registered
or certified mail (postage prepaid), return receipt requested, addressed to:

    If to the Executive:               Robert M. Grobstein
                                       18949 Treble Lane
                                       Boca Raton, FL  33498

    If to the Company                  SBA Communications Corporation
                                       6001 Broken Sound Parkway, Suite 400
                                       Boca Raton, Florida 33487
                                       Attention: Steven E. Bernstein, President

or to such other address as any party may designate by notice complying with the
provisions  of this Section.  Each such notice shall be deemed  delivered (a) on
the date delivered if by personal delivery; (b) on the date of transmission with
confirmed  answer back if by electronic  transmission;  and (c) on the date upon
which the  return  receipt  is signed or  delivery  is  refused or the notice is
designated by the postal authorities as not deliverable,  as the case may be, if
mailed.

         12.  AMENDMENTS.  The  provisions of this Agreement may not be amended,
              ----------
supplemented,  waived or  changed  orally,  but only by a writing  signed by the
party  as to whom  enforcement  of any such  amendment,  supplement,  waiver  or
modification is sought and making specific reference to this Agreement.

         13.  ASSIGNMENTS.  No  party  shall  assign  his or its  rights  and/or
              -----------
obligations under this Agreement without the prior written consent of each other
party to this Agreement.

         14.  COUNTERPARTS.  This  Agreement  may be  executed  in  one or  more
              ------------
counterparts,  each of which shall be deemed an original, but all of which taken
together shall constitute one and the same instrument. Confirmation of execution
by electronic  transmission of a facsimile  signature page shall be binding upon
any party so confirming.

         15. ENFORCEMENT COSTS. If any civil action,  arbitration or other legal
             -----------------
proceeding is brought for the  enforcement of this  Agreement,  or because of an
alleged dispute,  breach,  default or  misrepresentation  in connection with any
provision of this Agreement, the successful or prevailing party or parties shall
be entitled to recover  reasonable  attorneys' fees, sales and use taxes,  court
costs and all expenses  even if not taxable as court costs  (including,  without
limitation,  all such fees,  taxes,  costs and expenses incident to arbitration,
appellate,  bankruptcy and  post-judgment  proceedings),  incurred in that civil
action,  arbitration  or legal  proceeding,  in addition to any other  relief to
which such party or parties  may be  entitled.  Attorneys'  fees shall  include,
without limitation,  paralegal fees,  investigative fees,  administrative costs,
sales  and use  taxes  and all  other  charges  billed  by the  attorney  to the
prevailing party.


                                      - 8 -

 
         16. EQUITABLE REMEDIES. The Executive acknowledges that the services to
             ------------------
be rendered by the  Executive  hereunder  are  extraordinary  and unique and are
vital to the  success  of the  Company,  and  that  damages  at law  would be an
inadequate  remedy for any breach or threatened  breach of this Agreement by the
Executive.  Therefore,  in the  event of a breach  or  threatened  breach by the
Executive of any provision of this Agreement,  the Company shall be entitled, in
addition to all other  rights or remedies,  to an  injunction  restraining  such
breach,  without the Company being required to show any actual damage or to post
an injunction bond.

     17. GOVERNING LAW. This Agreement and all transactions contemplated by this
         -------------
Agreement  shall be governed by, and construed and enforced in accordance  with,
the laws of the State of Florida.

         18.  JURISDICTION AND VENUE. The parties acknowledge that a substantial
              ----------------------
portion of the  negotiations,  anticipated  performance  and  execution  of this
Agreement  occurred  or shall  occur in Palm Beach  County,  Florida.  Any civil
action or legal proceeding arising out of or relating to this Agreement shall be
brought in the courts of record of the State of Florida in Palm Beach  County or
the United States District Court,  Southern District of Florida, West Palm Beach
Division.  Each party  consents  to the  jurisdiction  of such court in any such
civil action or legal proceeding and waives any objection to the laying of venue
of any such civil action or legal proceeding in such court. Service of any court
paper may be effected on such party by mail, as provided in this  Agreement,  or
in such  other  manner  as may be  provided  under  applicable  laws,  rules  of
procedure or local rules.

         19. THIRD  PARTIES.  Unless  expressly  stated  herein to the contrary,
             --------------
nothing in this Agreement, whether express or implied, is intended to confer any
rights or remedies  under or by reason of this  Agreement  on any persons  other
than the parties hereto and their respective  administrators,  executors,  other
legal representatives,  heirs, successors and permitted assigns. Nothing in this
Agreement is intended to relieve or discharge the obligation or liability of any
third persons to any party to this  Agreement,  nor shall any provision give any
third  persons any right of  subrogation  or action over or against any party to
this Agreement.

         20.  SEVERABILITY.  If any  provision  of this  Agreement  or any other
              ------------
agreement  entered into pursuant hereto is contrary to,  prohibited by or deemed
invalid under applicable law or regulation, such provision shall be inapplicable
and deemed  omitted to the extent so contrary,  prohibited  or invalid,  but the
remainder hereof shall not be invalidated  thereby and shall be given full force
and  effect  so far as  possible.  If any  provision  of this  Agreement  may be
construed in two or more ways,  one of which would render the provision  invalid
or  otherwise  voidable or  unenforceable  and another of which would render the
provision  valid and  enforceable,  such provision  shall have the meaning which
renders it valid and enforceable.

     21.  SUCCESSION.  This Agreement is intended to supersede and terminate any
          ----------
and all prior  employment  agreements,  in their  entirety,  and all  amendments
thereto, between the Executive and the Company, SBA, Inc. and SBA Leasing, Inc.

                                      - 9 -

 
         22.   ENTIRE   AGREEMENT.   This   Agreement   represents   the  entire
               ------------------
understanding  and  agreement  between the parties  with  respect to the subject
matter  hereof,  and  supersedes  all  other  negotiations,  understandings  and
representations (if any) made by and between such parties.

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

                                            SBA COMMUNICATIONS
                                            CORPORATION


                                            By:   /s/ Steven E. Bernstein
                                                -------------------------------
                                                  Steven E. Bernstein, President

                                                     /s/ Robert M. Grobstein
                                                 -------------------------------
                                                       ROBERT M. GROBSTEIN








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