Regina Soufli is a Greek-American physicist and a staff scientist at Lawrence Livermore National Laboratory, in Livermore, California, where she works on the development and the characterization of materials and thin-film coatings for extreme ultraviolet (EUV) and X-ray applications. The results of her work is the heart of the reflective optics used in EUV lithography, the next-generation in semiconductor manufacturing technology, in satellites such as NASA's Solar Dynamics Observatory and NASA/NOAA's GOES-16 to GOES-19, or on optics for Free-electron lasers such as the Linac Coherent Light Source at SLAC National Accelerator Laboratory.