Quartet of execs take on new roles. 

Dunkin' Brands announced four appointments among its executive team.

Bill Mitchell was named president, Baskin-Robbins U.S. & Canada. Paul Twohig was appointed president, Dunkin' Donuts U.S. & Canada. Twohig takes over the role from CEO Nigel Travis, Twohig assumes the title of President, Dunkin' Donuts U.S. from Chief Executive Officer Nigel Travis, which will allow Travis to spend more time working with franchisees around the world.

Dunkin' Brands also named Scott Murphy its senior vice president, chief supply officer, working with both brands on a global basis. Murphy had formerly managed Dunkin' Donuts global supply chain.

Dunkin' Brands also named John Costello president, global marketing and innovation.