POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Eric Stier, Richard Slansky and Jennifer Williams, and
each of them individually, his true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer,
director and/or 10% or greater stockholder of GenMark Diagnostics, Inc. (the "Company"), any and all
Form 3, 4 and 5 reports, and any amendments thereto, required to be filed by the undersigned in accordance with Section 16(a)
of the Securities Exchange Act of 1934, as amended, and the rules promulgated thereunder;

(2) do and perform any and all acts for and on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Form 3, 4 or 5 report, and any amendment thereto, and timely file any such
report with the United States Securities and Exchange Commission and any stock exchange or similar
authority; and

(3) take any other action of any type whatsoever in connection with the foregoing which, in
the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required
by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf
of the undersigned, pursuant to this Power of Attorney, shall be in such form and shall contain
such terms and conditions as such attorney-in-fact may approve in his or her discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform
each and every act and thing whatsoever requisite, necessary, and proper to be done in the exercise of
any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned
acknowledges that no such attorney-in-fact, in serving in such capacity at the request of the undersigned,
is hereby assuming, nor is the Company hereby assuming, any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934, as amended.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required
to file Form 3, 4 and 5 reports, and any amendments thereto, with respect to the undersigned's holdings of and transactions in securities
issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact. This Power of Attorney hereby revokes and replaces any prior power of
attorney granted with respect to the undersigned's holdings of and transactions in securities issued
by the Company.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this
14th day of December, 2012.

/s/ Christopher Gleeson
Signature

Christopher Gleeson
Print Name

GLEESON CHRISTOPHER M 4