Guy O’Sullivan, who led Toronto’s Proper Television as president for more than a decade, has passed away. He was 49 years old.

“It is with great sadness that we share the news of the sudden passing of Guy O’Sullivan, president, Proper Television. On behalf of everyone at Proper Television, we extend our sincere condolences to his children and family,” read a statement from the company.

O’Sullivan founded Proper in 2004 and built the company into one of the foremost factual producers in Canada with series such as Vegas Rat Rods, True North Calling, Tougher Than it Looks?, MasterChef Canada and Canada’s Worst Driver, which has been on air for 12 seasons.

“Guy had a tremendous impact in the Canadian and international television industry, and was adored by his colleagues and staff. Out of respect for the family, no further comments will be made,” the statement said.

No other information was provided.

O’Sullivan was involved in the television industry for more than 20 years, starting out as a print journalist in the U.K. before producing and directing shows for the BBC between 1994 and 2000. He later moved to Canada where he founded Proper Television.

“In addition to his work on CTV’s MasterChef Canada projects, he helmed many of Discovery’s success stories for the last dozen years – more than half of the network’s history – developing personal friendships along the way. His work has made an indelible impact, and he will be dearly missed,” said Randy Lennox, president, Bell Media.