Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF THE
SARBANES-OXLEY ACT OF 2002

I, CORNELIS F. WIT, certify that:



|1. | I have reviewed this report on Form 10-Q for the quarterly period ended June 30, 2009 of OmniComm Systems, Inc.;
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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 officers 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 designated 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;
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|(b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
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|(c) | 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;
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|(d) | Disclosed in this report any changes in the registrants internal control over financial reporting that occurred during the registrants most recent fiscal quarter (the
registrants fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrants internal control over financial reporting, and
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5. The registrants other certifying officers and I have disclosed, based on our most recent evaluation of the internal controls 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 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.



|    |  |                                                      
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|By: |  | /s/ Cornelis F. Wit                                  
|    |  | Cornelis Wit                                         
|    |  | Chief Executive Officer (principal executive officer)

August 14, 2009

[A signed original of this written statement required by Section 906 has been provided to OmniComm Systems, Inc. and will be retained by OmniComm Systems, Inc. and furnished to the United States Securities and Exchange Commission or
its staff upon request.]