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EXHIBIT 31.2 CERTIFICATIONS I, Donald F. Fultz, certify that:  1.
    
    I have reviewed this annual report on Form 10-K of Argon ST, Inc.;2.
    
    Based on my knowledge, this annual report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to
make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by
this annual report;3.
    
    Based on my knowledge, the financial statements, and other financial
information included in this annual report, fairly present in all material
respects the financial condition, results of operations, and cash flows of
the registrant as of, and for, the periods presented in this annual
report;4.
    
    The registrants other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant
and have:  a.
    
    Designed such disclosure controls and procedures, or caused
such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known
to us by others within those entities, particularly during the
period in which this report is being prepared;b.
    
    Evaluated the effectiveness of the registrants disclosure
controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as
of the end of the period covered by this report based on such
evaluation; andc.
    
    Disclosed in this report any change in the registrants
internal control over financial reporting that occurred during the
registrants fourth fiscal quarter that has materially affected, or
is reasonably likely to materially affect, the registrants internal
control over financial reporting; and  5.
    
    The registrants other certifying officer and I have disclosed, based on
our most recent evaluation of internal control over financial reporting,
to the registrants auditors and the audit committee of the registrants
board of directors (or persons performing the equivalent functions):  a.
    
    All significant deficiencies and material weaknesses in the
design or operation of internal control over financial reporting
which are reasonable likely to adversely affect the registrants
ability to record, process, summarize and report financial
information; andb.
    
    Any fraud, whether or not material, that involves management or
other employees who have a significant role in the registrants
internal control over financial reporting. Date: December 14, 2004 /s/ Donald F. Fultz  Donald F. Fultz
Chief Financial Officer




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EXHIBIT 31.2 CERTIFICATION OF PERIODIC
FINANCIAL REPORT
OF
ARGON ST, INC. We, the undersigned, being the chief executive officer and chief financial
officer, respectively, of Argon ST, Inc., a Delaware corporation (the
Company), do hereby certify, to the best of our information, knowledge and
belief, that (1) the Report on Form 10-K for the year ended September 30, 2004
(the Report) fully complies with the requirements of section 15(d) of the
Securities Exchange Act of 1934 (15 U.S.C. 78o(d)) and (2) the information
contained in the Report fairly presents, in all material respects, the
financial condition and results of operations of the Company. /s/ Terry L. Collins Terry L. Collins
Chief Executive Officer
 /s/ Donald F. Fultz Donald F. Fultz
Chief Financial Officer
 Dated: December 14, 2004 A signed original of this written statement required by Section 906 of the
Sarbanes-Oxley Act has been provided to Argon ST, Inc. and will be retained by
Argon ST, Inc. and furnished to the Securities and Exchange Commission or its
staff upon request.