Charlie Sowell, a retired U.S. Navy commander and a former senior vice president at Salient CRGT, has joined Reston, Virginia-based

David Turner, formerly president of the applied technology and operational services group at Akima, has joined Hitachi Data Systems as president and CEO of

Gail Rissler, formerly a senior vice president of Suntiva, has been named the first chief operating officer of the company.