EXHIBIT 31.1


                               CERTIFICATION PURSUANT TO
                                 18 USC, SECTION 1350,
                                 AS ADOPTED PURSUANT TO
                      SECTION 302 OF THE SARBANES OXLEY ACT OF 2002


I, Frederick J. Slack, certify that:

1.  I have reviewed this quarterly report on Form 10-QSB
of 3Si, Inc. (the "Registrant" or the "Company");

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 in order 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.  I am 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
         procedure 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 upon such evaluations; 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 (the registrant's fourth 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

5.  I have disclosed, based on my 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 function):

     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 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 control
         over financial reporting

Dated:  July 26, 2007                  /s/  Frederick J. Slack
                                       Frederick J. Slack, Chief
                                       Executive Officer, Chief
                                       Financial Officer