Dr. Umstadter studied laser-driven electron accelerators for his physics PhD at UCLA, and then laser generated x-ray sources while a postdoc at AT&T Bell Laboratories. As a professor at the University of Michigan, he used ultra-high-intensity lasers to investigate relativistic nonlinear optics. Dr. Umstadter was appointed Olson Professor in the Physics and Astronomy Department at the University of Nebraska, Lincoln, where he founded and directs the Extreme Light Laboratory. He and his research group built and use the petawatt-peak-power Diocles Laser to study the physics and applications of novel laser-driven hyper-spectral radiation sources. He is a fellow of the American Physical Society.