EXHIBIT 31.1
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                              OFFICER'S CERTIFICATE
                             PURSUANT TO SECTION 302
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      I, Robert Legnosky, certify that:

      1. I have  reviewed  this form 10-Q for the quarter ended June 30, 2005 of
Celerity Systems, Inc.;

      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 small business
issuer as of, and for, the periods presented in this report;

      4. The small  business  issuer's  other  certifying  officer(s)  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 small
business issuer 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  small  business  issuer,
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) Omitted;

            (c) Evaluated  the  effectiveness  of  the small  business  issuer'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

            (d) Disclosed  in  this  report  any  change in the  small  business
issuer's  internal  control over financial  reporting  that occurred  during the
small business  issuer's most recent fiscal quarter (the small business issuer's
fourth  fiscal  quarter  in the case of an annual  report)  that has  materially
affected,  or is reasonably  likely to  materially  affect,  the small  business
issuer's internal control over financial reporting; and

      5. The small  business  issuer's  other  certifying  officer(s) and I have
disclosed,  based  on our  most  recent  evaluation  of  internal  control  over
financial  reporting,  to the small  business  issuer's  auditors  and the audit
committee  of the  small  business  issuer'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
reasonably  likely to adversely  affect the small business  issuer'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 small  business  issuer's
internal control over financial reporting.

                                             Date: August 15, 2005

                                             By: /s/ Robert Legnosky
                                                 -------------------------------
                                                 Robert Legnosky
                                                 Chief Executive Officer and
                                                 Interim Chief Financial Officer

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The introductory paragraph of the Section 302 certification that refers to the
certifying officers' responsibility for establishing and maintaining internal
control over financial reporting for the company, as well as paragraph 4(b),
have been omitted in accordance with Release No. 33-8238 (June 5, 2003) because
the compliance period has been extended for small business issuers until the
first fiscal year ending on or after April 15, 2005.

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