David A. Steinberg is the CEO of Zeta Global, a data and analytics company that uses a people-based marketing cloud to help leading brands acquire, grow and retain customers. Under Steinberg's leadership, the company was listed by Forbes as one of America's 50 Most Promising Private Companies. Prior to co-founding Zeta, Steinberg founded InPhonic, the largest seller of wireless phones and communications products and services on the Internet. InPhonic topped the Inc. 500 list of fastest-growing companies in 2004. Steinberg also was chairman and CEO of Sterling Cellular, a B2B and retail wireless communications provider, and Sterling Communications. He sits on the boards of the Milken Institute's FasterCures center and the Greater Washington Sports Alliance, as well as on the Board of Trustees of Washington & Jefferson College. He was named the Greater Washington Ernst & Young Entrepreneur of the Year for communications in 2002. Steinberg holds a B.S. from Washington & Jefferson College.