In this role, Brannigan was in charge of liaising with civil society, interest groups and business to communicate government policy. 
A month after leaving government, Brannigan set up Kingsgat Political Communications in July 2017. However, his Linkedin profile indicates that he is employed by lobbying firm UK Policy Group, which is a sister firm of US lobbying agency Definers Public Affairs.
Former soldier in Iraq
Brannigan is a former lieutenant colonel for the Royal Scots Dragoon Guards , and commanded a tank squadron to in Iraq, 2003.
- Harry Cole, Iraq War hero who played major role in liberation of Basra now has job with Theresa May in Downing Street, The Sun, 5 September 2016, accessed 12 January 2017.
- Paul Goodman, The Conservative Research Department always wins. A guide to Downing Street’s top team., Conservative Home, 5 September 2016, accessed 12 January 2017.
- Christopher Brannigan, Linkedin profile, accessed Feb 2018