From 1982 to 1990, Rushbrook worked for the
United Kingdom Atomic Energy Authority at the
Harwell Science and Innovation Campus. He was a consultant to Gibb Environmental from 1990 to 1992, and a senior specialist for Bechtel from 1992 to 1993. He worked for the
World Health Organization in
Nancy, France, and
Rome,
Italy, from 1993 to 2001, and in
Darfur, in 2008. In the
Cabinet Office he was head of the Public Sector Reform Team from 2001 to 2005, and service director in the IT Development Programme from 2007 to 2008. He worked as part of the programme to resettle Afghan interpreters. Rushbrook worked in the
Foreign, Commonwealth and Development Office for the
Governor of the
Turks and Caicos Islands from 2011 to 2013. From 2014 to 2018, he was Deputy Governor of
Akrotiri and Dhekelia. On 4 May 2019, he was appointed as the
Governor of Saint Helena,
Ascension, and
Tristan da Cunha and Ethel Yon, the Sheriff of Saint Helena, swore him into office on 11 May. He served until Nigel Phillips was selected to replace him as governor. He left office on 20 June 2022, and was followed by Greg Gibson as acting governor before Phillips arrival on 13 August. ==Personal life==