Paul is a Research Associate and Manager of the Visualization Software group in the Visualization division of the Texas Advanced Computing Center (TACC). His research interests include efficient algorithms for large-scale parallel visualization and data analysis (VDA) and innovative design for large-scale VDA systems. Recent work includes algorithms for ultrascale distributed-memory ray tracing, work that enables photo-realistic rendering of the largest datasets produced on supercomputers today, such as cosmologic simulations of the Universe and computational fluid dynamics (CFD) simulations at unprecedented levels of detail. Paul also helps manage TACC's visualization systems, including Longhorn, currently the world's largest supercomputer dedicated to VDA, and Stallion, currently the highest-resolution tiled display in the world.