Robert F. Heeter leads experiments on x-ray absorption and emission from high-energy-density plasmas as a staff physicist in the Radiative Properties Group of the LLNL Physics Division. He joined LLNL as a Lawrence Postdoctoral Fellow in 1999 after completing his Ph.D. at Princeton University, where he measured plasma instabilities in magnetic fusion devices. Since 1999 he has led experiments at the National Ignition Facility and Jupiter Laser Facility at LLNL, at the Z facility at Sandia National Lab, and at the Omega Laser Facility at the University of Rochester. His experiments produce detailed x-ray spectra to benchmark codes used in stockpile stewardship, inertial confinement fusion, and the astrophysics of stellar interiors and black hole accretion disks. He also serves as LLNL's "Omega Coordinator," guiding the teams fielding 70–80 LLNL experiments at Omega each year.