Mulholland began his writing career as an advertising copywriter in private radio. He went on to work as a researcher, story editor and interviewer for CBC Public Affairs television, a general-assignment reporter and music reviewer for the Ottawa Citizen, a syndicated country-music columnist, a part-time stand-up comic with Yuk Yuk’s, and a speech writer for a number of departments in the federal government.
During those years, Mulholland wrote fiction when time permitted. In the spring of 2001, he began devoting full-time to writing a novel. The result is McNab, which was published in October 2006. DUEL, his second novel, was published in October 2009. Chaudière Falls, his next “novel of dramatized history” is based upon the founding of Canada’s national capital region, and will be published in December 2016 to tie in with the country’s sesquicentennial.