In 1645, Giffard helped found the newly established trading company, Communauté des Habitants, which was open to all inhabitants in principle but which only the wealthiest colonists could join in practice.
In 1646, Giffard obtained an explicit order from the governor of the colony, Charles de Montmagny, that ended a nine-year dispute with Guyon and Cloutier in Giffard's favour.