Press Releases

Jupiter, FL–(December 7, 2009–BUSINESS WIRE)—Dyadic International, Inc. (Pink Sheets: DYAI) (“Dyadic”) today announced that Michael J. Faby will join Dyadic as its new Vice President Finance effective January 4, 2010. In this role, he will lead all of Dyadic’s finance, accounting, actuarial, tax, treasury and audit functions.

Mr. Faby brings to Dyadic over 20 years of financial, accounting and operational experience spanning a career that includes over 17 years with Perry Slingsby Systems, Inc. (f/k/a Perry Tritech Inc.)(“Perry”), a $113 million multi-national leader in the design and manufacture of remotely operated vehicles to the international offshore oil & gas, telecommunications, military and defense industries. During his 17 years with Perry, Mr. Faby served in various financial roles of increasing responsibility including, most recently, as its Chief Financial Officer. He holds a B.S degree in accounting from Florida State University and an MBA from Florida Institute of Technology. Mr. Faby is also a certified public accountant in Florida and a member of the American Institute of Certified Public Accountants and the Florida Institute of Certified Public Accountants.

“We’re delighted and fortunate to have Michael Faby join Dyadic’s executive leadership team,” said Mark Emalfarb, Dyadic’s Chief Executive Officer. “Michael brings a strong track record of global financial management and oversight. He is an outstanding leader with great integrity and loyalty who has the right balance of financial knowledge, internal controls experience, strategic thinking and overall problem-solving capabilities. Hiring a professional of Michael’s caliber is another significant step in Dyadic’s restructuring process which will help us maintain better control of our operations and identify and implement further cost savings as we continue to focus on licensing our technologies and growing our business.”

ABOUT DYADIC

Dyadic International, Inc. is an early-stage biotechnology company that uses its patented and proprietary technologies to conduct research, development and commercial activities for the discovery, development, manufacture and sale of products and solutions for the bioenergy, industrial enzyme and biopharmaceutical industries. Please visit Dyadic’s website atwww.dyadic.com.

CAUTIONARY STATEMENT FOR FORWARD-LOOKING STATEMENTS

Certain statements contained in this press release are forward- looking statements. These forward-looking statements involve risks and uncertainties that could cause Dyadic’s actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Except as required by law, Dyadic expressly disclaims any intent or obligation to update any forward-looking statements.

CONTACT:

Dyadic International, Inc.

Adam J. Morgan

Vice President General Counsel & Business Development

Phone: 561-743-8333

Email: amorgan@dyadic.com