"Marcus' proven leadership ability and wide range of skills will continue to serve the company well as he assumes this new role," said Corey Sanders, MGM's chief operating officer.
Glover joined MGM in 2015, serving as general manager and then president and chief operating office of Beau Rivage Resort & Casino in Biloxi, Mississippi.
He previously served as senior vice president and general manager for Caesars Entertainment in northeastern Ohio, and as assistant general manager and vice president of operations for Harrah's in St. Louis. He also held several leadership positions with Caesars in Mississippi and Louisiana.
MGM and Boyd Gaming opened the Borgata in 2003, and MGM bought out Boyd's half-share last August to become the sole owner of the casino.