Career
Reynett took part in the Ferrol Expedition in 1800 during the War of the Second Coalition and was appointed Deputy Assistant Quartermaster-General in 1808 during the Peninsular War. He went on to become Assistant Quartermaster-General in Germany in 1813 and military secretary to the Duke of Cambridge in 1820 before being made Inspector of Foreign outpatients at Chelsea Hospital later in 1820. Reynett was appointed Lieutenant Governor of Jersey in 1847.
He was also Colonel of the 48th Regiment of Foot.