[2] As an adult, Bertin served as a senior civil servant in the Ministry of the Navy, which was charged with overseeing mercantile shipping, naval operations, and overseas colonies.
Bertin shared control of the island with Rear Admiral Louis Thomas Villaret de Joyeuse as captain general and Le sieur Lefessier-Grandpré as grand judge.
[9] Bertin reported that the inhabitants of Martinique were happy to be once again under French rule, as he moved to establish hospitals and barracks and to refurbish military batteries and fortifications.
Bertin sought support for the island from the United States by opening the ports of Martinique to neutral ships,[12] but this proved ineffective in the face of the British maritime blockade.
[9] In 1804, Bertin was replaced by Pierre-Clément de Laussat, who had lost his position as colonial prefect of Louisiana following the sale of the territory to the United States.