Dr. De received Bachelor of Science degree with honors in chemistry and Master of Science in biochemistry from Calcutta University, India. He worked for few years at a National Cancer Institute in India before coming to US for post- graduate education in 1975. After completion of Ph.D in biochemistry from University of Maryland in 1980, he underwent two postdoctoral trainings in basic cancer research under the supervisions of Dr. Leon Heppel, National Academy of Sciences, at Cornell University, Ithaca, NY and Dr. Stanley Cohen, Nobel laureate, Medicine 1986, at Vanderbilt University, Nashville, TN. Gradually, he became highly interested in Clinical Chemistry. In 1993, he took a fellowshiin clinical chemistry and toxicology under the supervisions of both Dr. Amadeo Pesce and Dr. Bradley Copeland at University of Cincinnati Medical Center, Cincinnati, OH. Following completion he joined University of Mississippi Medical Center in 1995 as the Associate Director of clinical chemistry and toxicology. In 2005, Dr. De was appointed the Director of clinical chemistry and toxicology in the department of Pathology, University of Arizona Health Sciences Center. He is a board certified clinical chemist from the American Board of Clinical Chemistry, a board certified toxicologist from the National Registry of Clinical Chemistry and a fellow of the National Academy of Clinical Biochemistry. Since 2010, Dr. De has been serving as a member of the board of directors in the American Board of Clinical Chemistry, Toxicology and Molecular Biology. He was nominated to be the chair of nominating committe of this board in 2015. He has published more than 70 peer reviewed articles and meeting abstracts in basic and clinical sciences. He is a reviewer of both national and international journals and received recognitions as a Clinical Chemist from the American Association of Clinical Chemistry. In 2013 he was honored for the “Paul Finley Chemist Award” from University of Arizona Health Sciences Center. He is the co-principal investigator of a Center of Disease Control CDC) sponsored project on HIV screening and diagnosis. In 2019 he served as a regional president Rocky Mountain Section) of the American Board of Clinical Chemistry.