Zygo Corporation today announced that Dr. Chris L. Koliopoulos is stepping down as the Chairman of the Board, President and Chief Executive Officer effective immediately, following the mutual decision of Dr. Koliopoulos and Zygo’s board of directors. The Board has appointed director Gary K. Willis as interim Chief Executive Officer and Michael A. Kaufman as Chairman of the Board.

Mr. Willis has played a leadership role at Zygo in several capacities over the past three decades. He served as a director of Zygo from 1992 to 2000 and from 2009 to present, as Zygo’s Chairman of the Board from 1998 to 2000, as President in 1992 and as Chief Executive Officer of the Company from 1993 through 1999.

“The Board appreciates Dr. Koliopoulos’ service to Zygo and we wish him the best in his future endeavors,” said Carol Wallace, Chair of the Company’s Corporate Governance & Nominating Committee. “The Board of Directors is focused on achieving Zygo’s full potential for the benefit of our shareholders, and continuing to enhance Zygo’s leadership position in its markets. We believe that Mr. Willis has the requisite experience and leadership qualities to lead the company forward.

“It has been a privilege for me to work with many fine colleagues at Zygo” said Dr. Koliopoulos. “I am proud of Zygo’s many accomplishments, and look forward to its continued success.”

Zygo Corporation is a worldwide supplier of optical metrology instruments, precision optics and electro-optical design and manufacturing services serving customers in the semiconductor capital equipment, bio-medical, scientific and industrial markets.