Centre for Minerals Research, Dept Chemical Engineering, University of Cape Town

Harquail School of Earth Sciences, Laurentian University

Professor of Materials Science & Engineering, An-Majah National University

Full Professor of Mineralogy, University of Salamanca, Spain

Prof. of Geochemistry, Kharazmi University

Prof. UQAC, Canada Research Chair II in Geochemistry Applied to Ore Deposits

Assistant Professor, Univeristy of Padova, Department of Geosciences, Circe centre

Assistant Professor in Vrije Universiteit Amsterdam

Professore Associato-Università degli studi del Sannio

CN IGME, CSIC (Instituto Geológico y Minero de España )