Formerly: Executive Editor, International Migration Review. Formerly: Chairman: Migration Committee, Organization for Economic Cooperation and Development; Immigration Policy Task Force, US Department of Labor; Director, Immigration Policy and Research, US Department of Labor. Currently: Co-Founder, Metropolis, an international forum for research and policy on migration and cities; Convener: Athens Migration Policy Initiative; Transatlantic Council on Migration; Transatlantic Task Force on Immigration and Integration; President, Migration Policy Institute. Member of the Board, Migration Policy Institute. Author.