• by Joe Mandese  @mp_joemandese, January 17, 2012

Dentsu's flagship U.S. digital shop, 360i, has promoted Sarah Hofstetter to president, reporting to CEO Bryan Wiener.

Hofstetter, who has been with 360i for seven years, most recently was senior vice president of brand strategy & emerging media, and has been responsible for building the brand strategy, consumer insights, social media and mobile practices that helped the agency expand from its roots as a search shop.

In related moves, 360i promoted Jared Belsky to executive vice president, and named Dave Jacobs general manager of strategy, social media and SEO.

The agency said the restructuring comes at a critical time for the agency, which has seen its business "double in size over the last two years." Billings were not disclosed, but the agency has an organization of 425 people.

Belsky has been managing director of 360i’s Atlanta office, a role he will retain in addition to his new responsibilities, which include overseeing the agency's national media and analytics practice.

Jacobs had been vice president-operations & business development.