 Educated at Port Regis School prep school and later Sherborne School, he is the son of Sir Jeremy Greenstock, a former high-ranking British diplomat and the former United Kingdom Ambassador to the United Nations.Nick retired from full-time professional rugby in 2002, but played part-time with Harlequins and then London Irish 2002-2004 whilst working for the Royal Bank of Scotland.Nick left the Royal Bank of Scotland in 2010, and is Managing Director and a founder partner of Gatehouse Advisory Partners, a geopolitical consultancy established with his father Sir Jeremy Greenstock and Sir David Manning.