Population health management strategy firm Aegis Health Group has a new board after three former directors stepped down to make way for two former company executives, a veteran local health care entrepreneur and an investment banker with more than 25 years of experience.

Coming on board at Brentwood-based Aegis are Hal Andrews, Will Fitzgibbon, Jeff Pate and Henry Ross. They join CFO and interim CEO Lori Copeland — who stepped into the top position following the departure of Phil Suiter last fall — and are taking the place of Michael Barton, Clyde Bright and Rollie Wussow.