Thomas Dooley, the top corporate lieutenant to Viacom prexy and CEO Philippe Dauman, has been upped to chief operating officer of Viacom.

Dooley previously served as senior exec VP, chief financial officer and chief administrative officer, and he’s been a member of Viacom’s board of directors since 2006. He’ll continue as CFO until a successor is named. With the promotion, Dooley has extended his employment contract with the company through December 2016. It had been set to expire at the end of next year.

“Tom is an extraordinary executive with financial and operational experience that extends more than 30 years, the great majority of which he has spent here at Viacom,” Dauman said.

He also credited Dooley with having “strengthened Viacom’s financial position to historic levels, despite a very challenging environment” during his tenure as CFO.

Viacom’s divisional CEOs, including Paramount Pictures boss Brad Grey and MTV Networks chief Judy McGrath, continue to report to Dauman.

Dooley joined Viacom in 1980, and advanced to deputy chairman of Viacom alongside Dauman from 1996-2000.

The two exited to run investment firm DND Capital Partners before returning in September 2006 as Viacom prepared for its divestiture from CBS. He took on the CFO function in January 2007.