Dentsu Aegis’ mobile-first agency Fetch has boosted its US leadership team following a successful 2015.

The agency, which won Yelp, Hulu and Travelocity over the last 12 months, has grown 50% annually.

Fetch San Francisco general manager Guillaume Lelait has been appointed to executive vice president and US managing director as part of the switch-up.

Lelait, who has 12 years’ experience in mobile working with McDonald’s, Nissan, Shell and Purina, is credited with establishing Fetch’s San Francisco office and leading the win of Uber and Expedia.

Melina Ex has also been moved from country manager for Germany to East Coast managing director, reporting to Lelait. Ex has worked digitally in China, Africa and the UK, and won business from Axel Springer, HERE and Xing whilst running the Germany office.

“As we continue to win more and more business in the USA and in New York where mobile is thriving, I’m delighted for Guillaume to replicate our West Coast success and lead our overall US operations,” said Fetch chief executive officer James Connelly.

“The East Coast will play a fundamental role in our 2016 growth,” added Connelly. “Having established our Berlin office successfully, Melina’s international management and start up experience stands her in great stead to take our New York office to the next level.”