National Security Adviser

Sir Mark Lyall Grant


Sir Mark Lyall Grant took up the role of Prime Minister’s National Security Adviser on 7 September 2015.

Sir Mark Lyall Grant is a career diplomat, and has served on 4 continents. Prior to his appointment as National Security Adviser, he was:

  • the UK Ambassador and Permanent Representative to the United Nations (2009 to 2015)
  • Director General Political in the Foreign and Commonwealth Office (FCO), where he was the Principal Adviser to the Foreign Secretary on strategic foreign policy issues (2007 to 2009)
  • the UK High Commissioner to Pakistan (2003 to 2006)

In his earlier postings he served in Paris and Pretoria; as Private Secretary to the Minister for Europe in the FCO; and worked on EU and Africa policy.

Sir Mark Lyall Grant is a qualified barrister and was appointed to the Bench of Middle Temple in 2011.

National Security Adviser

The National Security Adviser is the Prime Minister’s senior adviser on national security issues.

He is also Secretary to the National Security Council (NSC) and Head of the National Security Secretariat. The National Security Adviser attends all meetings of the NSC and is responsible for the smooth running of the NSC, its sub-committees, and corresponding officials’ groups.

The National Security Adviser is responsible for managing the NSC agenda and for preparing records of its discussions and decisions.

Previous roles in government

  1. Ambassador and Permanent Representative, UK Mission to the UN New York

    • 2009 to 2015


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  1. Syria: 'It is the greatest regret of my time in New York that we failed to end the fighting and stop the humanitarian catastrophe in the region'

    • Speech
  2. "Countering violent extremism is one of the most pressing international challenges that we face"

    • Speech
  3. 'While we must all take steps to tackle extremism overseas, we cannot lose focus of our domestic responsibilities.'

    • Speech
  4. "The regional turmoil we are witnessing only reinforces the importance of resolving the Israel-Palestine conflict."

    • Speech
  5. "A political solution in Yemen remains the best way to counter the growing threat from terrorist groups"

    • Speech
  6. The United Kingdom welcomes the unanimous adoption of resolutions 2213 and 2214.

    • Speech
  7. "This Council must do its utmost to protect children and to give a strong voice to those most vulnerable."

    • Speech
  8. "We must not lose sight of how far Afghanistan has come in the past year."

    • Speech
  9. "EU-UN cooperation has proved its worth on many occasions."

    • Speech
  10. Latest UN report shows growing levels of human rights violations in Ukraine

    • Speech