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1111 14th St NW Ste 700
Washington, DC 20005


The DC Metro PSR Chapter formed in 2012.

Office bearers:

Mohammed Khalid, MD – President

Muhammad Umer Choudhry, MD – Director of Membership

Sonia Thangavelu, PhD – Advisor
Dr. Thangavelu is an inorganic chemist with specialization in X-ray crystallography and nuclear materials science. Dr. Thangavelu received her BS from Towson University, MS from Cornell University, and PhD from George Washington University. She has authored over 9 manuscripts in peer-reviewed journals and has given presentations at 11 national conferences, notably at the American Chemical Society (ACS), U.S. Department of Energy, and the American Crystallographic Association (ACA). She has received numerous awards for her work including the prestigious Paul A. Siple Memorial Award by the U.S. Armed Forces and the ACA award for outstanding research in crystallography. Prior to her graduate education, she was a laboratory technician at the Walter Reed Army Institute of Research synthesizing pharmaceutical drugs against biochemical warfare agents. She is also Vice President for Science and Security at Magen Security Solutions, a national security start-up consulting firm in Falls Church, VA. In her spare time, Dr. Thangavelu is a competitive volleyball player and practitioner of vinyasa yoga, where she finds peace and love through mindful meditation. She is also an avid artist of lace art crochet and has showcased her artwork at the U.S. Department of Agriculture, George Washington University, and Penn Social under the RAW non-profit organization in Washington DC.

Elizabeth Rumi, medical student – Director of Media Relations
Elizabeth is a graduate of Maryland University. She graduated with Latin Honors-Cum Laude, majoring in Biology-Physiology and Neurobiology. She is currently in the process of applying to medical schools and plans on ultimately practicing as an internist. Currently, she is working as an administrative manager for a physical and occupational therapy clinic, in addition to working as a medical assistant for an internist. She also interns for a medical officer at NIH and volunteers as a mentor for a non-profit organization. While at Maryland she founded a short-film student organization on campus and made several films with her peers. Using skills she developed during her undergrad, functioning as film director; she is currently working on a project to submit to short-film festivals in the metropolitan area.

Shakil A Saghir, MSPH, PhD, DABT, ERT, Fellow ATS – Advisor on Health and Environment
Dr. Saghir is a renowned toxicologist and Chief Scientific Officer at Smithers Avanza in Gaithersburg, MD. Dr. Saghir received his MSc in insect toxicology from University of Karachi and worked as an ecotoxicologist before winning a competitive scholarship for higher education. He completed his MS in Public Health and PhD in environmental toxicology from Universities of Alabama and Illinois, respectively. After completing postdoctoral assignments, he worked as a Research Assistant Professor at University of Kansas Medical Center and Research Scientist at the Hanford Nuclear Reservation of Pacific Northwest National Laboratory in WA before joining Dow Chemical Company in MI. In addition to industrial/agro chemicals and pharmaceuticals, Dr. Saghir researched ubiquitous environmental pollutants like PCBs, dioxins and drinking water disinfectant byproducts. He is a diplomat of the American Board of Toxicology, registered European toxicologist, and a fellow of the Academy of Toxicological Sciences. Dr. Saghir is a prolific writer; he has published over 70 scientific papers/chapters, numerous newspaper articles and technical reports, and has given over 150 presentations at conferences around the world. Dr. Saghir is active academically through adjunct, sabbatical and visiting appointments; he is currently a visiting Associate Professor at Aga Khan University Hospital studying placental and lactational transfer of environmental pollutants and their long-term effects on development.