Director, Earth Enginering Center, Columbia University

Professor of Analytical/Environmental Chemistry, Abia State University, Uturu, Nigeria

Associate Professor at Curtin University

Technische Universität Berlin, Germany

Professor

Institute of Chemical Technology, Mumbai

Korea University, Seoul, South Korea

Professor, Department of Electrical and Electronics Engineering, University of West Attica

Columbia University

Assistant Professor, Faculty of Integrated Technologies, Universiti Brunei Darussalam