Marcial Boo is a director of the National Audit Office responsible for strategy, communications and knowledge management.

He was previously responsible for the policy and research output of the Audit Commission and spent seven years in central government where he was responsible in the Home Office for crime reduction, including the national street crime initiative and targets successfully achieved to reduce burglary by 25% and car crime by 30%, and for developing national plans to respond to unconventional terrorist threats. At the Department for Education and Employment, he wrote and implemented the government's adult literacy strategy, Skills for Life.

Marcial has also worked in education in all three sectors, including at a teacher training college, a university business school, with the British Council in Ecuador and as a volunteer literacy tutor. He has founded and chairs a local transport charity, the Crab and Winkle Line Trust, is a school governor, and has published children's fiction as well as academic articles on literacy acquisition in the developing world.