Felix Rappaport, president and CEO of Connecticut’s Foxwoods Resort Casino, was found dead at his residence in the resort on Monday.

The Mashantucket Pequot Tribal Nation (MPTN), which operates Foxwoods, said the cause of Rappaport’s death has yet to be determined, although foul play is not suspected. MPTN chairman Rodney Butler called Rappaport’s surprise death “a major loss” and extended sympathies to Rappaport’s family.

Rappaport (pictured) had been Foxwoods’ chief exec for over four years, while his gaming industry career spanned four decades. Rappaport previously served with MGM Resorts International for over two decades, overseeing many of the company’s properties in Las Vegas, and also did stints with Station Casinos and the Hershey Entertainment and Resort Company.

Rappaport’s death comes just as MPTN is finally proceeding with its plans to build a joint venture casino with Connecticut’s Mohegan tribe in East Windsor. The federal government’s Bureau of Indian Affairs (BIA) dropped its longstanding obstructionism of the Mohegans’ participation in the project at the start of June.