EXHIBIT 99CERT.906


CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


J. David Officer,  President and Chief Executive Officer and Steven M. Anderson,
Vice  President,  Treasurer  and Chief  Financial  Officer of Mellon  Optima L/S
Strategy  Fund,  LLC  (the  "Registrant"),  each  certify  to the  best of their
knowledge that:

1.   The  Registrant's  periodic  report  on Form  N-CSR  for the  period  ended
     September 30, 2007 (the "Form N-CSR") fully complies with the  requirements
     of Section 15(d) of the Securities Exchange Act of 1934, as amended; and

2.   The  information  contained  in the  Form  N-CSR  fairly  presents,  in all
     material respects, the financial condition and results of operations of the
     Registrant.




/s/ J. DAVID OFFICER
- --------------------
J. David Officer
President and Chief Executive Officer

Date: December 7, 2007




/s/ STEVEN M. ANDERSON
- ----------------------
Steven M. Anderson

Vice President, Treasurer and Chief Financial Officer

Date: December 7, 2007


A signed original of this written statement required by Rule 30a-216,  under the
Investment  Company  Act of 1940 and 18 U.S.C.  ss. 1350 will be retained by the
Registrant and furnished to the Securities and Exchange  Commission or its staff
upon request.

This certification is being furnished to the Securities and Exchange  Commission
solely  pursuant to Rule 30a-2(b) under the  Investment  Company Act of 1940, as
amended, and 18 U.S.C. ss. 1350 and is not being filed as part of the Form N-CSR
with the Commission.