Kevin Cahill is an Irish author, political adviser investigative journalist. Based in the UK, he is a Fellow of the Royal Society and a Fellow of the British Computer Society. A former platoon commander, he began his journalism career as the International and Finance Editor of Computer Weekly, before moving to Computer News as Deputy Editor. He left to join The Sunday Times as an associate editor of the Sunday Times Rich list and has since written for The Sunday Times in other capacities, as well as New Statesman and Country Life. He has appeared on television, featuring for Channel 4 for their investigative program Despatches. He is Bureau Chief at the Global & Western News Bureau in Exeter, Devon.

Cahill has also worked in politics, serving as a part-time Research Assistant to Paddy Ashdown in the House of Commons of the United Kingdom, and working for the Chairman of the Parliamentary All Party Human Rights Committee in the House of Lords. He has worked as an adviser for former European Commission Vice President, the Hon Richard Burke, Robin Cook on the Scott Inquiry, and. former British Prime Minister Gordon Brown. He now serves as a special adviser to Lord Laird of Artigarvan in the House of Lords.

As an author, Cahill has written several books. His first work, The Principles of Business Systems, investigates systems within the business world, while his books Who Owns Britain, and Who Owns The World, examine land ownership. Another book, Trade Wars, investigated illegal U.S. Government interference in the UK and worldwide high technology industry in the 1980s, and was widely received.