Walton was commissioned into the
Medical Branch of the
Royal Air Force (RAF) on 27 March 1987 as a
pilot officer: she was being sponsored through her degree by a University Cadetship with the RAF. She graduated from
St Bartholomew's Hospital Medical School with
Bachelor of Medicine, Bachelor of Surgery (MB, BS) degrees in 1989. She transferred from a short service commission to a permanent commission on 24 April 1992. She has served a number of posting abroad, including with the
United Nations Protection Force in Bosnia-Herzegovina, in Kuwait as part of
Operation Desert Fox, and in Iraq as part of
Operation Telic. She was appointed Air Officer Medical Operations in
No. 38 Group RAF on 13 June 2016. She was then Commander of the Defence Medical Group from 2018 to 2020. From February 2020, she was Director Defence Medical Personnel & Training, based at
Defence Medical Services Whittington. In October 2022 it was announced that Walton would succeed as Director General of the Defence Medical Services from July 2023. She was appointed
Companion of the Order of the Bath (CB) in the
2022 New Year Honours. In 2025, Walton was appointed Commander to the
Venerable Order of St John (CStJ). ==References==