Kitchin became a Queen's Counsel in 1994. In 2001, he was appointed a Deputy High Court Judge. He was appointed to the High Court of Justice on 3 October 2005[3] and assigned to the Chancery Division; he was knighted in the same year. Kitchin has served as Chancery Supervising Judge for the Wales, Western and Midland Circuits since 2009. In 2011, he was appointed a Lord Justice of Appeal effective 5 October 2011,[4] and received the customary appointment to the Privy Council.
Kitchin became a Justice of the Supreme Court of the United Kingdom (UKSC) on 1 October 2018,[5] taking the judicial courtesy title of Lord Kitchin. He served at the UKSC until his retirement on 29 September 2023.[6]
