Alliance HealthCare Services Announces CEO Resignation; Effective June, 2012

Alliance HealthCare Services, Inc.

today announced that Paul S. Viviano, chairman of the board and chief executive officer of the company, has resigned to be effective in June, 2012. Larry C. Buckelew, a company director since 2009, including serving as a member of the Audit Committee and the Compensation Committee, has been named chairman of the board and interim chief executive officer, to be effective immediately upon Mr. Viviano's departure. Mr. Viviano is leaving the company to accept the position of associate vice chancellor for health sciences at the University of California, San Diego and chief executive officer of the UCSD Health System. Following his departure from Alliance, Mr. Viviano will continue to serve as a director of the company. Alliance also announced that Michael J. Shea has joined the company as chief operating officer effective June 4, 2012. In an unrelated development, Richard Hall has submitted his resignation as president of Alliance Oncology in order to accept a position as chief executive officer of a non-competing, New York-based company.