Allen is an internal promotion, and started at Fonterra as a graduate in 2008.
Gareth Fraser takes over the post from Mark Synnott, who becomes executive chair.
Fiona Oliver appointed, Doug Pearce has been reappointed.
Melissa Richards joins as head of strategy, product and growth. She will be based in New York.
Former Air New Zealand director Paul Bingham appointed.
Former National Party MP to leave after RNZ merger dropped.
Chloe Surridge will be chief operations officer on the executive team.
Nick Leggett takes up his chief executive position on April 24 in Wellington.
Damian Pedreschi appointed to boost growth and benefits for clients and communities in NZ.
Fidelity Life Acting CEO Ian Clancy has announced two temporary appointments to his executive team.