CANTON, MASS. — John Costello, Bill Mitchell and Paul Twohig have been named to president positions at Dunkin’ Brands Group, Inc.

Mr. Costello has been named president of global marketing and innovation, and he will continue to head global marketing, product development and channel businesses across both Dunkin’ Brands and Baskin-Robbins.

Mr. Mitchell has been named president of Baskin-Robbins U.S. and Canada and will head the Baskin-Robbins operations team.

Mr. Twohig has been named president of Dunkin Donuts U.S. and Canada. He will lead the Dunkin’ Donuts operations, franchising and development teams.

The company also named Scott Murphy as senior vice-president and senior supply officer. He was previously in charge of Dunkin’ Donuts global supply chain.