Career
He joined the ADQ in 2003. Domingue was first elected in the 2007 election with 49% of the vote. Liberal incumbent Dominique Vien finished second with 34% of the vote.
Domingue took office on April 12, 2007.
Prior to his political career, Domingue worked as an educator at a youth centre in Quebec City and was also the general manager of a youth house in the same region. He also occupied several positions at various youth development-related community organizations and associations.