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Mr. Mattes has served as our Chief Executive Officer and President as well as a member of the Board since his appointment on April 6, 2020. Prior to joining Coherent and beginning in June 2019, he was a Senior Advisor to McKinsey & Company, a leading global management consulting firm, providing corporate and strategic consulting services to various clients of the firm. From January 2018 to May 2019, he was an independent corporate advisor. From 2013 to December 2017, he was the Chief Executive Officer and a member of the board of directors of Diebold Nixdorf Incorporated, a retail and financial services technology systems company. He also served as its President from 2013 to August 2016. Mr. Mattes was the Senior Vice President, Global Strategic Partnerships at Violin Memory, a computer storage systems company, in 2013. He has also held various senior management positions with Hewlett-Packard Co., a computer technologies company. From 2008 to 2011 he was the Senior Vice President and General Manager of Hewlett Packard’s Enterprise Services for the Americas. From 2006 to 2008 he was Hewlett Packard’s Chief Sales Officer for the Enterprise Business. Mr. Mattes spent the first 20 years of his career (between 1985 and 2005) at Siemens, holding a variety of senior leadership positions. These culminated in his role as chief executive officer of Siemens Communications Inc., USA, in Boca Raton, Florida. He received his Diplom-Kaufmann in business administration from Ludwig Maximilan University.

At the end of February 2016 after four years in the role, I retired as President of The Knowles Teacher Initiative. Prior to that, I spent over 35 years in the Financial Industry as an Investment Banker and Venture Capitalist. Over the years, I have served on the Board of Directors of numerous publicly-held and private Corporations, including Metrologic Instruments, Inc., Mothers Work, Inc. (now Destination Maternity), Intelligent Electronics, Inc., and The JPM Company. I am currently on the Board of CSS Industries, Inc., a NYSE listed consumer products company.I have been a Trustee of numerous non-profit organizations, including, most recently the Knowles Teacher Initiative,the Pennsylvania Academy of the Fine Arts and the Woodlynde School.I have been a guest lecturer on the topic of Investment Banking at The Wharton School of The University of Pennsylvania, The Fox School of Business at Temple University and Drexel University's LeBow College of Business.

Bob Pierfy is a Chief Executive Officer at Varian Semiconductor Equipment and is based in Cranston, RI area.