Patrick T. Doyle. Sprint director since 2016; former Chief Financial Officer of DIRECTV. Mr. Doyle served as Chief Financial Officer of DIRECTV from 2007 until DIRECTV’s acquisition by AT&T in 2015, where he was responsible for all internal and external financial affairs within DIRECTV, including accounting, financial planning, treasury, business management, investor relations, audit, and tax. Mr. Doyle joined DIRECTV in 2000 and served in several executive roles before becoming Chief Financial Officer, including as Chief Accounting Officer, Controller, and Treasurer during his tenure at DIRECTV. Previously, he worked at Baker Hughes beginning in 1982 and eventually Hughes Electronics Corporation (the predecessor to DIRECTV) in various tax and corporate development roles. Prior to that, Mr. Doyle worked for four years at the public accounting firm of Deloitte & Touche.

Julius Genachowski. Sprint director since 2015, Managing Director of The Carlyle Group. Mr. Genachowski is a Managing Director at The Carlyle Group, a private investment company, which he joined in 2014. He served as Chairman of the U.S. Federal Communications Commission (“FCC”) from 2009 to 2013. Prior to serving at the FCC, he held senior executive positions at IAC/InterActiveCorp, which owned and operated multiple Internet and media businesses, and he was engaged with several public and private companies in the technology, media and telecommunications sector as a board member, investor or advisor. He has served on the President’s Intelligence Advisory Board and has taught a joint class at Harvard Business and Law Schools. Earlier in his career, he worked in Congress for the Select Committee on the Iran-Contra Affair, for then-Representative Charles Schumer, and he was a law clerk to U.S. Supreme Court Justice David H. Souter.

Admiral Michael G. Mullen, USN (ret). Sprint director since 2013; former 17th Chairman of the Joint Chiefs of Staff. Admiral Mullen served as the 17th Chairman of the Joint Chiefs of Staff from October 2007 until his retirement in September 2011. Previously, Admiral Mullen served as the 28th Chief of Naval Operations (“CNO”) from July 2005 to 2007. CNO was one of four different four-star assignments Admiral Mullen held, including Commander, U.S. Naval Forces Europe and Commander, Allied Joint Force Command, and the 32nd Vice Chief of Naval Operations. Since 2012, he has served as President of MGM Consulting LLC and is the Charles and Marie Robertson Visiting Professor at the Woodrow Wilson School of Public and International Affairs at Princeton University. He also sits on the Board of the Bloomberg Family Foundation.

Sara Martinez Tucker. Sprint director since 2013; former President and Chief Executive Officer of the National Math and Science Initiative. Ms. Tucker served as Chief Executive Officer and President at National Math and Science Initiative, Inc. from March 2013 until February 2015. Ms. Tucker served as the Under Secretary of the U.S. Department of Education from 2006 to December 2008. Her responsibilities included overseeing policies, programs and activities related to postsecondary education, vocational and adult education, and federal student aid. Ms. Tucker served as the Chief Executive Officer and President of the Hispanic Scholarship Fund from 1997 to 2006. Previously, she worked for 16 years at AT&T and served as Regional Vice President of its Global Business Communications Systems. She has been a Trustee of University of Notre Dame since June 2009, and a member of the University of Texas System Board of Regents since May 2015.