The ex-Barbados international made over 100 appearances for Wellington Phoenix in the A-League following a career in England that included stints with Milwall, Sheffield United and Crystal Palace.
Ifill will remain in charge of the Wairarapa United women's team in New Zealand and is looking forward to his first role with a national team.
"My main aim throughout my coaching career has always been to make everyone I work with better at what they do, whether it be the coaches, team managers or players," he said.
