Phil Simmons is expected to sign a contract to take over as West Indies coach in the coming days, bringing an end to a successful eight-year term with Ireland.
The 51-year-old from Trinidad informed the Ireland squad that he has been offered the job in the dressing-room at the Adelaide Oval following the defeat to Pakistan on Sunday that ended Ireland's World Cup participation.
Ireland beat the West Indies in their opening game, but lost out on a place in the quarter-finals to them on the basis of net run rate.
Simmons had previously stated that the only coaching position he would leave Ireland for was his former international side.
Stuart Williams has been interim coach to the West Indies since Ottis Gibson stepped down last August, with the West Indies Cricket Board keen to finalise a new coach ahead of the upcoming Test series against England.