Exhibit
31.1





302
CERTIFICATION





I, Collin
Sinclair, certify that:




1. I have reviewed the annual report
on Form 10-Q of Rostock Ventures Corp;





2. Based on my knowledge, this
quarterly 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. I am responsible for establishing
and maintaining disclosure controls and procedures (as defined in Exchange Act
Rules 13a-15(e) and 15d-15(e)) and internal controls over financial reporting
(as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant
and have:





(a)  Designed such
disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under my 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) Designed such internal control
over financial reporting, or caused such internal control over financial
reporting to be designed under my 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;





(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; and





(d)  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 fiscal quarter in 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 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
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 12, 2009
            /s/Collin
      SinclairCollin
      SinclairChief
      Executive OfficerChief
      Financial Officer