As the creative director, he will run the agency's creative department and report to Fallon's new vice-chairman, Bill Westbrook.
Feuerman's most recent role was vice-president and group creative director of Leo Burnett USA. Before that, he was the vice-president/partner/group creative director at the Martin Agency.
Fallon said: "Kerry is a strong strategist and a terrific presenter. Importantly, he knows how to make the people around him better. I am confident Kerry will be an inspired, challenging leader, taking us to new levels of creative excellence."