1)  Scientist II- SAIC-Frederick, NCI-Frederick, Frederick, MD 21702 from May 5, 2000 to November 29, 2001.  I was involved in the isolation & characterization of anticancer compounds from marine organisms.

2)   Visiting Scientist- SAIC-Frederick, NCI-Frederick, Frederick, MD 21702 from December 9, 1997 to May 5, 2000, where I was involved in the isolation & characterization of  anticancer and HIV-inhibitory lead compounds, with special emphasis to peptides from aqueous marine extracts.

3)  Post Doctoral- I carried out a two year of research (from April 1993 to March 1995) at the U.S. National Cancer Institute which was supervised by Dr. Kirk R. Gustafson. As a member of the research group headed by Dr. John H. Cardellina II, I successfully completed more than a dozen of projects dealing with the anti-cancer and HIV-inhibitory activities of the aqueous/ organic extracts of plants, marine and microbial organisms. A variety of compounds such as alkaloids, antibiotics, polyacetylenes, saponins, pterocarpans, lignans and peptides were obtained as active constituents.

4)  Doctoral research- During my Ph.D. research at the University of Strathclyde, under the supervision of Prof. Peter G. Waterman and Dr. Alexander I. Gray, I submitted a thesis entitled “Phytochemical and Chemosystematic Studies in Eristemoninae (Rutaceae).” This thesis describes the isolation and structure elucidation of a total of 93 compounds, including 34 novel ones from 11 Australian plant species and their uses as chemotaxonomic markers.

5)   Carried out a research project in partial fulfillment of the requirement for the degree of Master of Pharmacy, University of Dhaka and submitted a dissertation entitled “Antihypertensive Principle from Moringa oleifera.”

6)  Supervised/ co-supervised various research projects of the students approaching towards the degrees of M. Pharm./M.Sc./M. Phil./Ph.D. at the University of Dhaka and the Institute of Post Graduate Medicine & Research  (IPGMR), Dhaka-1000, Bangladesh.