GLEN is appointing Jillian van Turnhout to carry out a review of the organisation.
It comes just a day after its chairperson, Kieran Rose, resigned from the Gay and Lesbian Equality Network.
The group is facing questions over funding and is potentially facing a review by the Charities Regulator.
The non-governmental organisation made a voluntary disclosure to the regulator amid queries over a number of issues.
The review will begin on April 24th, and report to the board within a period of six weeks.