 Tremblay has worked to promote the economy of Saguenay, initiating actions to attract more cruise ships, as well as support development of the city and industries.He worked to recover taxes owed by private hydroelectric plants within the city, as they were exploiting a city resource.In 2008 he was the first mayor of a major Quebec city to implement a new form of municipal management called « Gestion par activités » (City Stat Performance Strategy).