Boulanger entered the service of the Hudson's Bay Company in 1838 and arrived at Fort Simpson in the same year. He was later transferred to Fort Stikine, where he worked as a miller. In the spring of 1842 he was questioned during the investigation into the death of John McLoughlin Jr. Although he was not present at the murder, it was thought he may have had knowledge of the plot to kill young McLoughlin. After being kept for a time in semi-confinement, he returned to service in Fort Stikine. Apparently he went back to St. Thomas (Ontario) for an unknown period of time before returning to the west coast where was assigned to Fort Victoria sometime in 1848. He died in Fort Victoria on January 1, 1849 due to complications from an undisclosed illness.