Byrne has worked across the creative and television sectors for more than 30 years, and joins The Moment from agency BDA Creative, where he was chief operating officer and group finance director.
He has also worked as finance director at Evolutions Television, and spent five years at Granada plc in a variety of senior roles.
Byrne will join the company’s board, where his key responsibilities will include driving the financial and commercial performance of The Moment, which is backed by private equity firm, LDC.
Mark Hawkins, The Moment’s chief executive said: "I’m delighted to welcome Emmet to The Moment in order to strengthen our executive team as we push forward with an ambitious growth strategy. His knowledge and experience will be invaluable to us."
Byrne added: "I am very pleased to join The Moment at such an exciting time in their journey, as they embark on the next phase of their strategy. I am looking forward to working with Mark and the rest of the management team to deliver on those plans."