Mark Sedwill
British diplomat and former Cabinet Secretary and National Security Adviser; former trustee of the HALO Trust
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| Born | October 1964 |
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| Occupation | Diplomat; civil servant; peer |
| Known for | Cabinet Secretary (2018–2020); National Security Adviser (2017–2020) |
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Mark Sedwill (Lord Sedwill of Sherborne) is a former British diplomat and senior civil servant who was Cabinet Secretary from April 2018 to September 2020 and National Security Adviser from April 2017 to September 2020.[1] He has twice served as a director of The HALO Trust, a CSSF framework supplier.[2][3]
Career
According to his official biography, Sedwill "joined the Foreign & Commonwealth Office in 1989, serving in Egypt, Iraq, Cyprus and Pakistan", was Director of UKvisas (2006–08), HM Ambassador to Afghanistan (2009–10), NATO Senior Civilian Representative in Afghanistan (2010–11), FCO Political Director (2012–13) and Permanent Secretary at the Home Office (2013–17). The same biography describes him as President of the Special Forces Club.[1]
The Middle Temple describes him as a cross-bench member of the House of Lords, chairman of the Atlantic Futures Forum, a non-executive director of Rothschild & Co and of Lloyd's of London, a Distinguished Fellow of RUSI, a member of the IISS Advisory Council and an Honorary Colonel in the Royal Marines.[4]
CSSF contractor connections
Companies House records Sedwill as a director of The HALO Trust from 29 July 2015 to 30 March 2017 (as Sir Mark Sedwill) and again from 29 March 2020 to 30 June 2022 (as Lord Sedwill).[2] The HALO Trust's 2023 annual report lists "The Rt. Hon. Lord Sedwill KCMG FRGS (retired 30 June 2022)".[5] Companies House also records him as a former director of REACT Disaster Response Ltd (09644561), from 23 September 2015 to 8 November 2019.[6]
| Company | Role | Appointed | Resigned |
|---|---|---|---|
| The HALO Trust (02228587) | Director | 29 July 2015 | 30 March 2017 |
| REACT Disaster Response Ltd (09644561) | Director | 23 September 2015 | 8 November 2019 |
| The HALO Trust (02228587) | Director | 29 March 2020 | 30 June 2022 |
See also
Notes
- ↑ 1.0 1.1 GOV.UK, Sir Mark Sedwill GCMG GOV.UK, accessed 16 October 2026.
- ↑ 2.0 2.1 Companies House, THE HALO TRUST (02228587): officers Companies House, accessed 16 October 2026.
- ↑ The HALO Trust is a named Lot 1 and Lot 3 supplier to the CSSF Framework Agreement 2023–27: Foreign, Commonwealth and Development Office, Conflict, Stability and Security Fund (CSSF) Framework Agreement (2023-2027): contract award notice 029743-2023 Find a Tender Service, 2023.
- ↑ Middle Temple, The Rt Hon the Lord Sedwill GCMG FRGS Masters of the Bench, accessed 16 October 2026.
- ↑ The HALO Trust, Annual Report 31 March 2023 The HALO Trust, 2023.
- ↑ 6.0 6.1 Companies House, Mark Philip SEDWILL: personal appointments Companies House, accessed 16 October 2026.