Andrew is Emeritus Professor of Government at King's College London, and was previously the Academic Director of the International School for Government at King's. He has worked in a range of areas including British, European, and US policy and politics. His main areas of research include comparative public policy, public administration and issues around the reform and modernization of government and governance.

He was Editor in Chief of the journal International Review of Administrative Sciences, and Editor of Public Money and Management for ten years up until 2024, and was a member of the Council of Administration of the International Institute for Administrative Sciences. His community work included over 17 years as a Justice of the Peace.