He served as Governor of Saint Vincent (1802–1806), Essequibo Demerara (1806–1812), and Berbice (1814–1820).
[2][3] He was a grandson of Willem Bentinck van Rhoon,[4]: 71 and a relative of William Cavendish-Bentinck, 3rd Duke of Portland.
[5] In the same year, Bentinck left for Great-Britain,[3] and started to work for the British colonial service.
[6] The British government issued a rule overturning the Demerara Court of Policy's decision to proscribe slaves from holding meetings at night.
[4]: 32 In April 1812, he returned to England and was succeeded by Hugh Lyle Carmichael.