A former top Civil Service boss to worked for Prime Ministers Theresa May and Boris Johnson is to join the board of BAE Systems later this year.
Lord Mark Sedwill is to become a non-executive director of the company on November 1.
In his final decade in public service, he was British ambassador and NATO representative in Afghanistan, Foreign Office political director and Home Office permanent secretary.
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That period culminated in him serving as national security advisor from 2017 to 2020 and cabinet secretary from 2018 to 2020.
Prior to this, he held diplomatic and security posts, serving in Egypt, Syria, Jordan, Cyprus and Pakistan.
Lord Sedwill said: "BAE Systems is the UK's leading defence company and is thus central to this country's national security and economic agenda.
"I am delighted to have been invited to join the board and look forward to contributing to the company's continuing success."
BAE Systems chairman Sir Roger Carr added: "I am delighted that Mark has agreed to join the BAE Systems board.
"He is globally respected and has enjoyed an outstanding public service career at the most senior level.
"He will bring well-informed geopolitical and economic perspectives to the board, as well as experience in leading large and complex organisations.
"His appointment will be a great addition to the board and further strengthens its credentials given the company's role in supporting global security."
Lord Sedwill is a senior adviser and supervisory board member of Rothschild & Co, and the senior independent director and senior deputy chair of Lloyd's of London.