Coucheron came to Norway as an engineer and quartermaster general for the region south of the Dovrefjell mountain range in central Norway in June 1657. He served as captain of the Oplandske National Infantry Regiment in 1658 and captain of the Valdres company Under the command of Jørgen Bjelke he led his company in combat at Bohuslän in 1659, and in the defense of Halden from 14 January to 23 February 1660.