Exhibit 31.1

CERTIFICATION

I, Martin A. Roenigk, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of CompuDyne
    Corporation;

2.  Based on my knowledge, this 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 report;

3.  Based on my knowledge, the financial statements, and other
    financial information included in this 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 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 we 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; and

    (c)  Disclosed in this report any change in the registrant's
         internal control over financial reporting that occurred
         during the registrant's most recent 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 registrant's board of directors;

    (a)  All significant deficiencies and material weaknesses in
         the design or operation of internal controls over financial
         reporting which are reasonably likely to adversely affect
         the registrant's ability to record, process, summarize
         and report financial information; and

    (b)  Any fraud, whether or not material, that involves management
         or other employees who have a significant role in the
         registrant's internal controls over financial reporting.


Date: August 13, 2003             /s/ Martin Roenigk
                                  ---------------------
                                      Martin Roenigk
                                      Chief Executive Officer