The National Women's Council is calling for an Independent investigation of the Gate Theatre, into the conduct and behaviour of Michael Colgan while CEO.
Seven women have detailed their experiences of what they say is the abuse of power by Mr Colgan.
The Chair of the National Campaign for the Arts says she believes the trust with the Gate Theatre is broken.
Jo Mangan is Chair of the National Campaign of the Arts and says Michael Colgan had a reputation that he was difficult to work with for a long time.
"Many of us working in theatre would have been aware of rumblings of behaviour around The Gate and towards women", she said.
Seven women have come forward to outline their experiences of working with Mr Colgan, starting with Grace Dyas who said he made inappropriate comments of a sexual nature to her.
Jo Mangan worked extensively with the Waking the Feminists Movement which called out the sector for its lack of gender equality in terms of Directors, Playwrights and other staff.
Asked about why allegations of sexual harassment didn't come out then, Jo said it took extreme bravery to put their heads above the parapet.
"You are putting your career, your reputation, your livlihood on the line by standing up and saying 'me too' - we do not like whistle-blowers in this country", she said.
The Women's Council is calling for an independent investigation, Children's Minister Katherine Zappone says women's voices must be heard.
"Of course I would be deeply concerned by that, and I think it is really important that spaces are being made where women feel they are able to speak", she said.