Mr. Hosein has been a member of the Board of Directors since December 2005. Since August 2013, he has served as Executive Vice President and Chief Financial Officer of RingCentral, Inc., a publicly traded provider of software-as-a-service cloud-based business communications solutions. From June 2008 to October 2012, he served as Chief Financial Officer of Marvell Technology Group Ltd., a publicly traded semiconductor provider of high-performance analog, mixed-signal, digital signal processing and embedded microprocessor integrated circuits, and he also served as its Interim Chief Operating Officer and Secretary from October 2008 to March 2010. From 2003 to 2008, he served as Vice President and Chief Financial Officer of Integrated Device Technology, Inc., a provider of mixed-signal semiconductor solutions. From 2001 to 2003, he served as Senior Vice President, Finance and Administration and Chief Financial Officer of Advanced Interconnect Technologies, a semiconductor assembly and test company. He has also held other senior level financial positions, including the role of Chief Financial Officer at Candescent Technologies, a developer of flat panel display technology. Early in his career he spent 14 years in financial and engineering roles at IBM Corporation.
Mr. Ingram joined the Board of Directors in December 2008 and has served as Lead Independent Director since October 2011. Since January 2007, he has been a General Partner in Hatteras Venture Partners, a venture capital firm that invests in early stage life science companies in the southeast United States, and he has also served as strategic advisor to the chief executive officer of GlaxoSmithKline plc, a publicly traded pharmaceutical research and development company. From 2003 through 2009, he served as Vice Chairman Pharmaceuticals, GlaxoSmithKline. He previously served as Chief Operating Officer and President of Pharmaceutical Operations of GlaxoSmithKline following the December 2000 merger of Glaxo Wellcome plc and SmithKline Beecham plc. Prior to the merger he served as Chief Executive Officer of Glaxo Wellcome plc and as Chairman, President and Chief Executive Officer of Glaxo Wellcome Inc. Mr. Ingram also serves on the Board of Directors of Regeneron Pharmaceuticals, Inc. and BioCryst Pharmaceuticals, Inc., and serves as Lead Director of Valeant Pharmaceuticals International, Inc. He also served as Chairman of the Board of Directors of OSI Pharmaceuticals, Inc. from January 2003 until its sale in June 2010, and served on the Board of Directors of Elan Corporation, plc from December 2010 until its sale in December 2013 and as its Chairman from January 2011 until December 2013. He previously served as a director of Misys plc, Nortel Networks Corp., Wachovia Corp., Lowe's Companies, Inc., Pharmaceutical Product Development, Inc., Allergan, Inc. and Edwards Lifesciences Corporation until 2005, 2006, 2008, May 2011, December 2011, December 2012, and July 2015, respectively.
C. Howard (Ward) Nye joined the Board of Directors in October 2015. Since May 2014, he has served as the Chairman of the Board of Directors of Martin Marietta Materials, Inc., a leading supplier of aggregates and heavy building materials, and has also served as its Chief Executive Officer since January 2010 and as President since August 2006. Mr. Nye previously served as President and Chief Operating Officer of Martin Marietta Materials from 2006 to 2009. Prior to this, he was employed by London-based Hanson PLC, an international building materials company, for nearly 13 years holding various positions of increasing responsibility, including Executive Vice President in the North American Division.
Mr. Plastina joined the Board of Directors in December 2007, and began serving as the Company’s Interim Executive Vice President–Power & RF in June 2015. Mr. Plastina will serve as the Chief Executive Officer of this business, named Wolfspeed, Inc. From May 2012 until June 2015, he served as President and Founder of Arc & Company, LLC, an advisory and angel investment firm. He has also served as an Entrepreneur-in-Residence with the Blackstone Entrepreneurs Network in Research Triangle Park, North Carolina since October 2011. From February 2006 until January 2011 he served as President and Chief Executive Officer, and as a board member, of Tekelec, a publicly traded provider of telecommunications network systems and software applications. From September 2005 through February 2006 Mr. Plastina served as Executive in Residence at Warburg Pincus LLC, a private equity firm, where he was responsible for evaluating potential investments and providing executive support to portfolio companies. From 2003 to 2005, he held various executive positions with Proxim Corporation, a provider of Wi-Fi and broadband wireless access products, including Executive Chairman, President and Chief Executive Officer. From 1987 until 2002, Mr. Plastina served in a series of management and executive positions with Nortel Networks Corporation, a multi-national telecommunications equipment provider.
Mr. Replogle joined the Board of Directors in January 2014. Since March 2011, he has served as Chief Executive Officer and President of Seventh Generation, Inc., a manufacturer and distributor of sustainable household products. From 2006 to 2011, Mr. Replogle served as President and Chief Executive Officer of Burt's Bees, Inc., and from 2003 to 2006, he served as General Manager of Unilever's Skin Care division. Previously, he worked for Diageo, Plc for seven years in a number of different capacities, including as President of Guinness Bass Import Company and Managing Director of Guinness Great Britain. He started his career with the Boston Consulting Group. Mr. Replogle also served as a director of Sealy Corporation, a publicly traded mattress manufacturer, from 2010 to 2013, until its sale to Tempur-Pedic International Inc.
Mr. Tillman joined the Board of Directors in October 2010. From November 1994 to January 2005, he served as a director of Lowe's Companies, Inc., as its Chairman from January 1998 to January 2005, and as its President and Chief Executive Officer from August 1996 to January 2005. After his retirement from Lowe's, he served on the Board of Directors of Bank of America Corporation from April 2005 to May 2009, and also served as a member of its Asset Quality and Executive Committees.
Ms. Whitaker joined the Board of Directors in December 2013. Since May 2015, she has served as Executive Vice President and Company Group Chairman of Valeant Pharmaceuticals International, Inc., a publicly traded multinational specialty pharmaceutical company headquartered in Québec, Canada. She previously served from September 2014 to April 2015 as the Chief Executive Officer and President and as a member of the Board of Directors of Synta Pharmaceuticals Corp., a publicly traded biopharmaceutical company. From September 2011 to August 2014, Ms. Whitaker served as the President of North America Pharmaceuticals for Sanofi S.A., a global integrated healthcare leader focused on patients’ needs. From September 2009 to September 2011, she served as Senior Vice President and Business Unit Head, Cardiovascular, Metabolic and Urology (CVMU) at GlaxoSmithKline plc, a publicly traded pharmaceutical research and development company. From October 2008 to August 2009, she served as Senior Vice President of Leadership and Organization Development, and prior to that served in various leadership positions in GlaxoSmithKline’s commercial organization. Ms. Whitaker began her pharmaceutical career in 1991 as a metabolic disease specialist with Upjohn Company before joining GlaxoSmithKline as a sales representative in 1992.