Is the leader of the Bioinformatics and Computational Biosciences Branch as the Chief of a group of about 50 researchers and software developers in the Office of Cyber Infrastructure and Computational Biology at the National Institute of Allergy and Infectious Diseases. His scientific expertise includes molecular simulations and scientific 3D modeling. His graduate and postdoctoral work at Cornell University and elsewhere at NIH focused on X-ray crystallography. His doctoral work was recognized with the Pauling Award from the American Crystallographic Association and he is the author of several scientific research articles.