Lecturer, Universitas Andalas
Peneliti Hukum pada Divisi Pengendalian Pencemaran dan Kerusakan Lingkungan Hidup, Indonesian Center for Environmental Law (ICEL)
Chair of Doctoral Program in Social Sciences, Universitas Diponegoro
Manager of the Molecular Characterization and Analysis Complex, University of Maryland, Baltimore County
Professor of Chemistry and Dean of the College of Natural and Mathematical Sciences, University of Maryland, Baltimore County
Lecturer at the International Relations Department, Faculty of Social and Political Sciences, Universitas Gadjah Mada, Universitas Gadjah Mada