Based in Washington, D.C., Sutphen has been VP, government relations and legislative counsel for Viacom.
Sutphen is second chair to DeDe Lea, executive VP of government relations.
"David has been a key member of our team for the past four years," Lea said in announcing the change. "With his legislative expertise and strong advocacy skills, he has played a central role in advancing Viacom's position on a variety of important issues."
Sutphen joined the company in 2004 from the Recording Industry Association of America.