The chief executive of EBS Building Society, Ted McGovern, is to step down at the end of the summer after seven years in the job.
A statement from the society said the search for a successor would start immediately.
His resignation comes following a turbulent period for the society, after details of boardroom rows became public ahead of the AGM in April.
Independent director Eithne Tinney narrowly failed to be re-elected at the meeting despite not having the support of the board.
