[2] He was also a considerable investor in the TransAtlantic Slave Trade and was duty-governor of the Royal African Company of England for the RAC between 1693 to 1694.
[3] He had part-ownership in many RAC Guineamen, trading in enslaved Africans with the Hannibal slave ship being just one example.
[4][5] Stanier became a merchant of Bishopsgate and was a member of the Drapers Company.
He stood for Parliament for City of London at the 1708 general election but was unsuccessful.
Subsequently, he was Colonel of the Red Regiment for the rest of his life.