Duncan Mavin Journalist, The Washington Post. Author, The Pyramid of Lies: Lex Greensill and the Billion-Dollar Scandal Duncan Mavin is an editor and columnist for The Washington Post, based in the UK. He was previously a journalist with The Wall Street Journal in London, New York and Hong Kong. His writing has also appeared in Barron’s, the Financial News and on Bloomberg News. Duncan is also the author of The Pyramid of Lies: Lex Greensill and the Billion Dollar Scandal. He is a former chartered accountant and studied history at Durham University.