[5] Dornan also holds a Master of Business Administration and helped Dalhousie University, where he is an assistant professor, establish a satellite residency program in New Brunswick.
[3][6] In August 2021, Dornan became the interim president and CEO of Horizon Health Network during the COVID-19 pandemic and became its permanent head in March 2022 with a five-year contract.
[3][7] Four months later, after the death of a patient in the Dr. Everett Chalmers Regional Hospital in Fredericton, Premier Blaine Higgs publicly announced Dornan's termination during a July 2022 press conference, alongside the removal of Dorothy Shephard as health minister and the firing of the Horizon and Vitalité Health Network boards.
In February 2023, an adjudicator awarded him $1.8 million in lost salary, pension, and benefits as well as $200,000 in aggravated damages for "breach of the employer's implied obligation to act in good faith when dismissing him.
[2][8][9] Dornan was elected in October 2024, defeating the Progressive Conservative candidate and retired Royal Canadian Navy captain Paul Dempsey.