Change of British High Commissioner to Tonga: Keith McMahon 25.3.2026 | Her Majesty's Revenue and Customs Mr Keith McMahon MBE has been appointed British High Commissioner to the Kingdom of Tonga in succession to Mr Philip Malone LVO, who will be transferring to another Diplomatic Service appointment. Mr Keith McMahon MBE has been appointed British High Commissioner to the Kingdom of Tonga in succession to Mr Philip Malone LVO, who will be transferring to another Diplomatic Service appointment. Mr McMahon will take up his appointment during June 2026. Curriculum Vitae Full name: Keith David McMahon Year Role 2022 to present Accra, Deputy High Commissioner 2022 Tashkent, First Secretary Political 2019 to 2021 Khartoum, Deputy Ambassador 2016 to 2019 FCO, Deputy Director Financer 2014 to 2016 Washington, Chevron Corporation, Head of Corporate Affairs (on special unpaid leave from FCO) 2008 to 2014 Washington, First Secretary, Corporate Services 2007 to 2008 FCO, Finance Directorate, Corporate Transformation 2003 to 2007 Athens, First Secretary, Corporate Services 1999 to 2003 FCO, Desk Officer, Democratic Republic of Congo, Rwanda and Burundi 1998 to 1999 FCO, Desk Officer, China 1998 Paris, Third Secretary Consular 1995 to 1998 Yerevan, Deputy Ambassador 1992 to 1995 FCO, Worldwide Floater 1990 to 1992 Lusaka, Third Secretary Management 1988 to 1990 FCO, Finance Department 1988 Joined FCO https://www.gov.uk/government/news/change-of-british-high-commissioner-to-tonga-keith-mcmahon