 From 1987 to 2000, De Martin served as a municipal councillor in Godmanchester.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 organisations 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.