Penn State University

Professor emeritus, Faculty of Geodesy, University of Zagreb

Professor of Cartography, University of Zagreb

RMIT University (retired)

Doctor of Engineering, Professor (Full), KN Toosi University of Technology

Professor of Geodesy and Surveying

Professor of Geographic Information Sciences, University of Redlands

Assistant Professor of Computer Science, Augustana University

ESRI, Inc.

İzmir Katip Çelebi Üniversitesi