Michael Bernhard is a Researcher and Lecturer in the department of Adult Education and Lifelong Learning at the Goethe University, Germany.

Stephen Billett is Professor of Adult and Vocational Education, Griffith University, Australia.

Christiane Hof is Professor for Adult Education and Lifelong Learning at the Goethe University, Germany.

Katrin Kraus is Professor of Vocational and Adult Education at the University of Zurich, Switzerland.

Victoria J Marsick is Professor of Adult Learning and Leadership, Department of Organization & Leadership, Columbia University, Teachers College, USA.

Peter H. Sawchuk is Professor of Adult Education and Workplace Learning at the University of Toronto, Canada.