The Board of Dublin-based charity Inner City Helping Homeless has suspended an employee and appointed a senior counsel to examine "serious matters" that have come to its attention.
In a statement, the board of the homeless charity said it has also suspended the use of a separate service provider.
Inner City Helping Homeless Chairperson David Hall said that in recent days, serious matters have come to the attention of the board.
"We immediately initiated an investigation and commenced an independent process, which we expect recommendations from shortly. In the interim, we have suspended an employee and the use of a separate service provider," he said.
"The board has also moved to appoint an independent senior counsel, Mr Remy Farrell to fully evaluate issues of concern. We are in communication with the Charities Regulator."
Mr Hall added that "the board is mindful of the vital role our team of volunteers and staff play in the daily lives of those sleeping rough in Dublin. We are grateful to them and our wider network of supporters.
"We as a board will continue to take whatever steps are necessary at this time to protect and enhance the invaluable work of the organisation and the welfare of all service users."