He is Professor of Evaluation in the Policy Evaluation and Research Unit (PERU) at Manchester Metropolitan University, Research Associate at NatCen Social Research, Visiting Fellow at the Policy Studies Institute and Honorary Fellow at the Institute for Employment Studies. He specialises in impact evaluation including RCTS and quasi-experimental designs; he also uses theory-based approaches in his work. He is responsible for the design, delivery and execution of evaluation studies in a range of different areas, such as, work, education, employment and skills, welfare, crime and justice, business support, innovation, youth transitions and health. For over 20 years he has designed and delivered studies for a range of different central government departments, local government and not-for-profit clients. In 2013, he co-authored a study for the European Commission, offering a practical guide for managing authorities to design and commission counterfactual impact evaluations.