In May 2011, Harrison joined
Newport County as assistant manager to
Anthony Hudson and backup goalkeeper. Following the sacking of Hudson in September 2011 Harrison was appointed caretaker manager for one match, a 2–0 defeat at Darlington.
Justin Edinburgh was appointed team manager on 4 October 2011 and
Jimmy Dack appointed assistant manager, therefore Harrison was released from his contract. On 2 August 2012, it was announced that Harrison had been appointed permanent goalkeeping coach at
Wycombe Wanderers, after a period working at the club on a temporary basis.{{cite news Harrison was also listed as a player at Wycombe, taking shirt number 21. Harrison left Wycombe in January 2014 to take up a coaching role at Premier League
West Ham United as academy goalkeeper coach. He was replaced at Wycombe by
Barry Richardson. On 3 July 2015, Harrison returned to Leyton Orient as first team goalkeeper coach under the management of Ian Hendon. In January 2021, he returned to
Wycombe Wanderers as their goalkeeping coach.{{cite news On 7 October 2022, it was announced that Lee Harrison would join Colchester United as First Team Goalkeeping coach, becoming new head coach Matt Bloomfield's first addition to his backroom staff. On 22 February 2023 Lee Harrison returned to
Wycombe Wanderers for the third time as goalkeeping coach following Matt Bloomfield from Colchester United. == References ==