Last month, Envision Healthcare announced key structural changes including a stock repurchase of up to $250 million based on market conditions and a number of shifts in their executive leadership. Staff changes are all set to go into effect on Oct. 2.

Karey Witty, a 25-year healthcare executive has been appointed executive vice president and COO, which is a new role for the company with a direct report to Envision President & CEO Christopher Holden. Witty most recently served as CEO of Corizon Health. Prior to that, he held CFO roles for naviHealth and HealthSpring.

Kevin Eastridge has been named CFO following the announcement of Claire Gulmi's retirement, and Kenneth Zongor has been named to succeed Eastridge in his previous role as chief accounting officer for the publicly traded company. Gulmi will serve as an advisor for one year to assist in the transition.

Brian Jackson has been named president of Envision Physician Services, where he previously served as COO. His promotion comes following the resignation of Bob Coward.