The chief executive of the official Brexit campaign group has joined think tank The Legatum Institute to focus on a future trading relationship between the US and the UK.
Matthew Elliot served as chief executive of Vote Leave during the referendum campaign, and previously founded the TaxPayers' Alliance campaign group.
He will join Legatium as a senior fellow, exploring the possibilities of a UK-US trade deal and exploring the rise of populism.
Elliott said: “Brexit provides us with an opportunity to promote global prosperity by strengthening free trade, and the Institute is one of the only think-tanks with the skills and global reach to achieve this important objective.
"Clarity of thought is also required on the rise of populism, and I look forward to analysing the similarities and differences between public opinion in Britain and overseas."
He is the latest senior figure from the Vote Leave campaign to secure a high-profile role in the outside world.
The Brexit campaign's former communications director Paul Stephenson launched lobbying firm Hanbury Strategy in September, and chief spokesman Rob Oxley is now a special adviser at the Department for International Development.