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Mr. Margerum joined Plantronics in 1994 as Vice President of Marketing and was promoted in 1996 to President and General Manager of the Computer and Mobile Systems Group. In 1997, he left Plantronics to become President and CEO of Euphonix, Inc., a public company in the high-end audio equipment space. In 2000, he re-joined Plantronics and in 2004 became Vice President of Strategy and Business Development and in 2008, he was named Chief Strategy Officer. Prior to joining Plantronics, from 1989 to 1994, Mr. Margerum was CEO of Mitem Corporation, a middleware software company. From 1980 to 1989, he was Vice President of Marketing for GRiD Systems Corporation, a laptop computer manufacturer, where he held a variety of marketing and sales positions. Mr. Margerum also worked for Apple, Inc. and IBM Corporation and has served on the boards of both public and private companies. Mr. Margerum holds a Bachelor of Science in Engineering from Princeton University and a Master of Business Administration from Stanford University.