Dr. Andrew A. Johnson is a recognized expert in numerical simulation and modeling, computational methods, fluid dynamics, and high performance and parallel computing.  He has previously served as a Senior Scientist at the Army High Performance Computing Research Center, and had been with that organization for well over a decade.  More recently he has founded and served as President and Chief Scientist at Digital Rocket Science LLC.  Currently, Dr. Johnson serves as a Senior Research and Development Engineer within the simulation group at Industrial Light and Magic in San Francisco California.