Employment Agreement

     This Agreement  ("Agreement")  dated this 1st day of January,  2005 between
Science  Dynamics  Corporation  ("Parent"),  a  Delaware  corporation,   Systems
Management Engineering,  Inc. and Eric D. Zelsdorf ("Employee"),  sets forth the
terms and conditions governing the employment  relationship between Employer and
Employee.

     1. Employment.  During the term of this Agreement,  as hereinafter defined,
Employer hereby employs Employee as Chief Technology  Officer of Employer at its
office  located at 12100 Sunset Hills Rd. Suite 330,  Reston,  Virginia,  or any
other  location  within a  fifteen  (15)  mile  radius  of the same  ("Principal
Office").  Employee hereby accepts such employment upon the terms and conditions
hereinafter  set forth and agrees to  faithfully  and to the best of his ability
perform  such  duties as may from time to time be  assigned  by  Employer,  such
duties to at all times be rendered at the Principal  Office and to be consistent
with  the  duties  customarily  associated  with  title  and  position  of Chief
Technology Officer, generally.

     2. Term. Subject to the provisions for termination hereinafter, the term of
this Agreement  shall begin on the date of this Agreement and shall terminate on
December 31, 2007.

     3. Compensation. For all services rendered by Employee under this Agreement
during the term hereof, Employer shall pay Employee the following compensation:

          a) Salary.  A base salary of One Hundred  and Sixty  Thousand  Dollars
($160,000)  per annum payable in accordance  with  Employer's  standard  payroll
practices.

          b) Incentive  Bonus.  Employee  shall have the  opportunity  to earn a
percentage of the base salary set forth in subparagraph 3(a) above in Employer's
bonus plans as adopted from time to time.

          c) Stock  Options.  Employee  shall be granted a one time,  option for
shares in Science  Dynamics  Corp to be vested over three years,  in  accordance
with the company's employee stock option program and the pool of options granted
in  accordance  with the  purchase  agreement.  The strike  price for the entire
option grant shall be the stock price at the close of the acquisition of SMEI by
Science Dynamics. Employee shall be eligible to receive future options under the
stock option plan of Parent to purchase  common  shares of Parent or any similar
plans as may be in effect from time to time.

          d) Other  Benefits.  Employee  shall  maintain  current  benefits  and
corresponding  Employer  contribution (or better) or equivalent benefits for the
duration of this  agreement  (three years ending  December  31,  2007).  Current
benefits  include:  family health care insurance,  family dental care insurance,
company paid personal $1MM life insurance policy, company paid key man $1MM life
insurance policy,  short term and long term disability,  401(k) with safe harbor
matching,  $500 per month car  allowance,  four  weeks  paid  vacation,  and all
government  holidays.  In addition,  employer  shall cover all costs  related to
continuing  education in coursework or training  programs related to technology,
business, or other related initiatives.

     4. Extent of Services.  Employee shall devote his full time,  attention and
energies  to the  business  of  Employer  and shall act in  accordance  with his
fiduciary  responsibility  to the corporation.  Employee shall not engage in any
business activity during his employment that directly competes or conflicts with
the business of the employer,.  Employee  warrants and represents that he has no
contracts  or  obligations  to  others  which  would   materially   inhibit  the
performance of his services under this  Agreement.

     5. Noncompete and Disclosure or Use of Information.  The Employee agrees to
sign an mutually  agreeable  noncompete  and  disclosure  or use of  information
agreement  with the  company  prior to the close of the  acquisition  of SMEI by
Science Dynamics.


     6. Notices. Any notice, request or demand required or permitted to be given
under this  Agreement  shall be in writing,  and shall be sent by  certified  or
overnight  mail to the  residence of Employee or  Principal  Office of Employer,
respectively.

     7. Elective  Position;  Effect of  Termination.  Nothing  contained in this
Agreement  is  intended  to  abrogate,  limit or affect  the  powers,  rights or
privileges of Employer to terminate  the  employment of Employee with or without
cause, as those terms are described in Section 10 of this Agreement. If Employee
is  terminated  by Employer  without  cause or resigns  with cause,  he shall be
entitled to all compensation and benefits  otherwise  remaining and unpaid under
the  remaining  term of this  Agreement,  providing he remains ready willing and
able to perform the duties  hereunder  at the time of  termination.  Resignation
with cause shall include,  but not be limited to: a reduction in position and/or
responsibilities;   a  material  change  in  employee's   reporting   structure;
relocation  beyond 30 miles of  "Principal  Office,"  as defined in Section 1 of
this agreement (unless mutually agreed upon in writing). Additionally, all stock
options  granted  under  this  Agreement  will  become  immediately  vested  and
exercisable.  In the event  Employee  is  terminated  by  Employer  for cause or
resigns  voluntarily  without cause, no compensation shall be due Employee other
than that which has been earned through the date of termination.

     8.  Waiver  of  Breach.  The  waiver  by  either  party of a breach  of any
provision of this Agreement shall not operate or be construed as a waiver of any
subsequent breach.

     9. Assignment.  The rights and obligations of Employer under this Agreement
shall  inure to the  benefit of and shall be  binding  upon the  successors  and
assigns of Employer.  The obligations of Employee  hereunder may not be assigned
or delegated.

     10.  Termination  of Agreement.  This  Agreement  shall  terminate upon the
following events and conditions:

          (a) Upon expiration of its terms.

          (b) For cause by the Employer  immediately upon written notice.  Cause
shall  be  constituted  by  material  breach  of  this  Agreement  by  Employee,
conviction  of a felony by  Employee or any  willful  act acts or  omissions  of
dishonesty by Employee which cause harm to Employer.

          (c) For cause by Employee immediately upon written notice. Cause shall
be constituted by material breach of this Agreement by Employer.

          (d) Without cause by either party upon written notice.

          (e) In the event  that  Employee  is unable to  perform  the  services
called for hereunder by reason of incapacity  or  disablement  for more than six
(6) months  (whether  consecutive or not) in any  twenty-four  (24)  consecutive
months,  Employer  shall have the right to terminate  this  Agreement by written
notice to Employee. Notwithstanding such termination, Employee shall be entitled
to any disability benefits generally available to employees of Employer.  In the
event of such  termination,  all non-vested  obligations of Employer or Employee
pursuant to this Agreement shall terminate as of the date thereof.

     11. Entire  Agreement;Choice  of Law. This  instrument  contains the entire
agreement  of the  parties.  It may be changed  only by an  agreement in writing
signed  by  the  party  against  whom   enforcement   of  any  waiver,   change,
modification,  extension,  or  discharge  is  sought.  This  Agreement  shall be
governed  by the laws of the  State of  Virginia,  and any  litigation  shall be
conducted in the State of Virginia.

     IN WITNESS  WHEREOF,  the parties have executed this  Agreement on this 4th
day of February, 2005. EMPLOYEE Witness


 /s/ Eric D. Zelsdorf                               /s/ Barbara Schipper
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Eric D. Zelsdorf                                    Barbara Schipper

EMPLOYER                                            Attest
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 /s/ Barbara Schipper                               ________________________
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By: Barbara Schipper
Its: Vice President

PARENT                                              Attest
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 /s/ Paul Burgess                                   ________________________
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By: Paul Burgess
Its: Chief Operating Officer