Full professor in the Department of Chemical Materials and Biomolecular Engineering, University of Connecticut.
Chairman of ASM Materials Synthesis.

Endowed Professor of Pharmacy and Professor of Pharmaceutics at Xavier University College of Pharmacy.
Founder and Director of the Center for Nanomedicine and Drug Delivery at Xavier University of Louisiana.

Professor in the Department of Chemistry and Biochemistry at the New Mexico State University.

Ohio Eminent Scholar.
Howard D. Winbigler Professor in the College of Engineering. Director of the Nanoprobe Laboratory for Bio– & Nanotechnology and Biomimetics (NLB2), Ohio State University.

Professor at School of Mechanical and Materials Engineering, Washington State University.
Visiting Professor at Harvard University (Cambridge, MA).

Director, Dept. of Biomedical Engineering; Dept. of Chemical & Biochemical Engineering, Rutgers University.

Assistant Clinical Professor in the Department of Oral and Maxillofacial Surgery, The University of the Pacific.
Director of San Francisco Dental Society.

Assistant Professor of Chemistry and Biomolecular Science at Clarkson University.

Professor of Biochemistry at the Faculty of Agricultural Sciences of the University of Naples "Federico II".
Associate professor of Biochemistry at the Faculty of Medicine of the University of  Naples.

Lecturer in Department of Chemistry, Mansoura University.
Visiting researcher in Department of Chemistry, Drexel University.