Holds doctorate and master’s degrees in phylogenetic systematics from Ohio University. Currently, serves as an ultrastructural scientist at the National Eye Institute (NEI) of the National Institutes of Health (Bethesda, Maryland, USA). Before joining NEI in October 2011, he had worked at the Laboratory of Pathology of the National Cancer Institute (NCI) since 1998. Additionally, he has taught at Birzeit University (Palestinian Territories) and worked on phylogenetic analysis at the Smithsonian Institution, vaccine analysis at Water Reed Army Institute of Research, and ultrastructural pathology at the Department of Pathology of George Washington University. In his current position at NEI, he works on clinical and research projects in ultrastructural pathology. His record of publication is diverse and includes papers and book chapters on ultrastructural pathology, bioinformatics, tumor biology, systematics, virology, traditional medical systems, and global warming.