He served as Governor of St. Thomas and St. John from 1773 to 1795 and then as Governor-General of the Danish West Indies from 1796 until he died in 1798.
[2] His younger half-sister Elisabeth Sophie Charlotte de Malleville (1740–1768) married Hans Gustav Lillienskiold (1727–1786), owner of Lilliendal, Skuderupgaard and Høvdinghus.
He left Copenhagen on board a ship in early November and arrived to St. Thomas on 22 December.
In 1796, he was appointed as Governor-General of the Danish West Indies with titular title of general.
Rumour had it, according to Charlotte Dorothea Biehl, that his wife had an affair with Frederik Carl Warnstedt.