Waples joined FD in early 2010 as a senior MD after 25 years as a journalist. He takes on responsibility for the strategic direction and operational functions of FD's UK business.
The agency has also promoted Mark McCall, senior MD, to head of FD Americas and Beth Saunders, senior MD, to chairman of FD Americas.
These appointments follow the recent naming of Ed Reilly as global CEO and Geoffrey Pelham-Lane as global president.
Meanwhile, the agency has been contracted by the Government of Hungary to communicate economic reforms to the international media and investment community.
Last week, Hungary laid out plans to cut public debt and persuade ratings agencies not to downgrade the country's credit rating to junk status.