Moriarty will work with the current chief executive Andrew Haines on a changeover until next summer.
Moriarty is the current deputy chief executive and also group director of consumer and markets. He re-joined the CAA in 2016, having been chief executive at the Legal Services Board, which oversees the legal profession in England and Wales.
Moriarty has also held senior public and private sector roles at Affinity Water, the Social Housing Regulator, the Postal Services Commission and the Office of Gas and Electricity Markets.
