Born in Tangier, Morocco, but raised in Toronto, Benmergui studied journalism at Ryerson Polytechnical Institute, where he was news director and program producer at the university's radio station. The CBC offered Benmergui a research job in Winnipeg. From there, he went on to produce current affairs documentaries and was named host of Night Lines, a late-night music show on CBC Stereo.
He has won a prestigious Japan Prize for Best International Youth Programming, a Yorkton Film Festival prize for Best Youth Programming, and has been the recipient of five Gemini Award nominations.
He is married to Cortney Pasternak, a former television journalist and media consultant.