Served in the 5th Bengal Cavalry 1851. Assistant agent to the Governor General, Rajputana 1856: Political Agent at Alwar 1858; Military secretary to the Viceroy Lord Lawrence 1863 – 1864; Resident, Nepal; retired 1878. A prolific and skilled photographer, Impey was a frequent contributor to exhibitions of the Bengal
Photographic Society and a committee member in the mid 1860’s. A collection of his photographs was published in his Delhi, Agra and Rajputana, illustrated by eighty photographs (London, 1865).