22nd Annual Technology, Internet & Communications Conference

John Stephens is senior executive vice president and chief financial officer, with responsibility for financial planning, corporate development, accounting, tax, auditing, treasury, investor relations, corporate real estate and shared services for AT&T. Together, these functions represent nearly 16,000 employees. John was appointed to his current position in June 2011.

Previously, John served as senior vice president and controller, with responsibility for all financial reporting and operational reporting, accounting policy, business planning and regulatory reporting for AT&T. He also served as chief financial officer for the Diversified business unit and had responsibility for all corporate tax and shared services. He was named to that position in November 2001.

Prior to serving as controller, John served as vice president-taxes, where he oversaw all corporate tax matters, a position to which he was appointed in August 2000. He previously served as managing director-taxes, where he had similar corporate tax responsibilities. He was named to that position in 1995.

John joined the company as director-federal taxes in St. Louis in 1992. Prior to joining the company, he served as a tax senior manager with Ernst & Young in St. Louis. His career also includes service as a member of the tax staff of Peat Marwick & Mitchell in Kansas City.

John earned his B.S.B.A. degree in accounting from Rockhurst University in Kansas City. He also holds a J.D. degree from Saint Louis University’s Law School. He has served on the board of directors of América Móvil, an international provider of telecommunications service. Additionally, he serves on the audit committee of the board of directors of a large privately held retailer. He also serves on the board of directors of the Dallas Chamber of Commerce. John serves on an advisory board to the Mays Business School at Texas A&M University, is chairman of the United Way of Dallas, serves on the board of Catholic Charities of Dallas and has also served on the boards of numerous educational and social service organizations.

John and his wife, Michele, have been married 35 years and have six children.

Dr. Muneeb Ali is the co-founder of Blockstack, a full-stack decentralized computing platform. He serves as the CEO of Blockstack PBC, a Public Benefit Corp that is developing the core protocols for Blockstack. He has raised 55+ million USD in capital from investors like Union Square Ventures, Y Combinator, Lux Capital, Naval Ravikant, Kevin Rose, and others. Blockstack was recently featured in the CNBC’s list of 100 promising startups to watch.

Muneeb received his Ph.D. and Masters in Computer Science from Princeton University, both specializing in distributed systems. His Ph.D. thesis was nominated for the ACM SIGCOMM dissertation award by Princeton University. At Princeton, he worked in the Systems & Networks group and at PlanetLab--world’s first cloud computing testbed. Muneeb gives guest lectures on cloud computing at Princeton University and his research publications have over 1,200 citations. You can follow him on Twitter @muneeb.

Ronan Dunne is executive vice president and group president of Verizon Wireless, with responsibility for leading and growing the operations of America’s most reliable wireless network, which generated nearly $92 billion in 2015 revenue.

Dunne is responsible for all aspects of Verizon Wireless’ operations, including marketing operations, wireless operations, network operations, customer care and digital operations.

Before being named to his current position, effective September 2016, Dunne was chief executive officer of Telefónica UK (O2) for eight years. While leading O2 UK, the second-largest wireless operator in the United Kingdom, he significantly improved its growth trajectory through market leadership in brand, customer satisfaction and loyalty.

Dunne was a member of Telefónica Europe’s Executive Committee since January 2008 and a member of the Telefónica SA Executive Committee since 2014.

He was previously O2’s chief financial officer in the UK, and prior to that he served as head of finance and deputy to the group chief financial officer of O2 from 2001 to 2005.

Prior to joining O2 in 2001, he held senior positions in banking with Banque Nationale de Paris and in the corporate sector with Exel plc. and Waste Management International plc.

Born in Dublin, Dunne is a fellow and former council member of the Chartered Accountants Ireland (CAI) and a fellow of the Association of Corporate Treasurers (ACT).