William K. O'Brien
Mr. O'Brien served as Executive Chairman at Enterasys Networks, a public technology company, from 2003 until his retirement in 2006. He served as Chief Executive Officer of Senior Leadership Enterasys from 2002 to 2004, and as a member of the Board of Directors of Enterasys from 2002 to 2006. Prior to working at Enterasys, he worked for 33 years at PricewaterhouseCoopers where he held several different senior management positions in auditing and professional services including serving as global managing partner of PwC. He was a director of Virtusa Corporation, a publicly-traded IT services and outsourcing company, from 2008 to 2020.