Division Director, National Center for Computational Science, ORNL

Corporate Fellow & Chief Scientist for Biotechnology, Biological Sciences, ORNL

Distinguished Research Staff and Section Head, Computational Sciences and Engineering Division, ORNL

Senior R&D Staff, Buildings and Transportation Science Division/Energy Science and Technology Division, ORNL

Distinguished R&D Staff, Group Leader, Program Manager, Buildings and Transportation Sceince Division, ORNL

Senior Research Scientist, Materials Science and Technology Division

Distinguished Research Scientist, Buildings and Transportation Science Division, ORNL

Division Director, Manufacturing Science Division, ORNL

Advanced Computing in Chemistry and Materials, CCSD, ORNL

Group Lead, Modern Nuclear I&C and Distinguished R&D Staff, Nuclear Energy and Fuel Cycle Division, ORNL