professor of public administration, Utrecht University

Open University

Fundação Getúlio Vargas (FGV/EAESP - São Paulo, Brazil)

Professor of Public Administration, California State University San Bernardino

Professor of Public Management, Institute of Public Administration, Leiden University

Professor of Public Leadership, Leiden University, The Netherlands

Professor, University of Alabama

Professor of Public Administration and Government, UNC Chapel Hill

University of Kansas

Emeritus Professor of Public Leadership Tilburg Law Tilburg University