Mr. Sharbutt is a retired business executive who most recently served as CEO and Chairman of Alamosa Holdings, Inc., a provider of wireless communications services, which was acquired by Sprint Nextel Corporation in February 2006. Mr. Sharbutt had been Alamosa's Chairman and a director since the company was founded in July 1998 and was named CEO in October 1999. Before joining Alamosa, Mr. Sharbutt was President and CEO of Hicks & Ragland Engineering Co., an engineering consulting company (now known as CHR Solutions).
David has been a member of the Board of Directors for American Tower (NYSE:AMT) since 2006. He is Chairman of the Nominating & Corporate Governance Committee. He previously served on the board's Audit Committee. American Tower operates in 16 countries, and provides shared infrastructure for wireless telecommunication companies.
David invests in and serves on the board of several privately held enterprises. He is the Chairman of two technology startup companies, Smartfield, Inc. and MicroZap Inc."