Professor of Space Science (Emeritus), University of Kent

Resident Senior Fellow at the Australian Strategic Policy Institute (ASPI)

Professor Emeritus of Astronomy, University of Bern, Switzerland

Former Chair UNCOPUOS Legal Subcommittee

Deputy Director, Aerospace Security Project and Senior Fellow, Defense and Security Department, Center for Strategic and International Studies, Washington DC, USA

CIGI Senior Fellow and Senior Researcher, Project Ploughshares, Canada

Head of Transparency International Defence and Security

Management consultant, and President Emeritus of the International Public Management Network