De Martin was heavily involved in the farming and agriculture industries; he was co-owner of the local farm Fermes AJIRO 1989 Inc. for 27 years. He was also an administrator for several associations and organizations including the union of the Union des Producteurs Agricoles (Saint-Anicet branch), the local development for the Upper Saint-Lawrence region, and the Saint-Jean de Valleyfield commercial culture union.
Politics
From 1987 to 2000, De Martin served as a municipal councillor in Godmanchester. De Martin was first elected to the National Assembly in the 2007 election with 43% of the vote, defeating Liberal incumbent André Chenail, who received 31%. During the election campaign, De Martin received the endorsement of controversial but influential Huntingdon Mayor Stéphane Gendron, who reportedly had stormy relations with Chenail.[2] De Martin was defeated in the 2008 election.