Michelle Shriver was promoted to senior vice president of operations for Ameristar Casinos. Shriver will be based in Ameristar's corporate office in Las Vegas and report to John Boushy, Ameristar CEO and president. In her new role, Shriver will be responsible for all gaming and hotel operations. Shriver previously served as senior vice president and general manager of Ameristar Black Hawk Casino in Black Hawk, Colo. Shriver's career with Ameristar began in 1996 in the corporate marketing department. She transferred to a property marketing position in 1998 and returned to Ameristar’s corporate offices in 2000 as a director of marketing.