Stephen Streiffer

Dr. Stephen Streiffer leads more than 7,000 staff members in fulfilling Oak Ridge National Laboratory’s mission to deliver scientific discoveries and technical breakthroughs needed to realize solutions in energy and national security, accelerate innovation, and increase U.S. competitiveness. Streiffer came to ORNL in 2023 from Stanford University, where he served as interim director of SLAC National Accelerator Laboratory. He joined Stanford in 2022 as the university’s vice president responsible for oversight of the lab. He previously spent 24 years in research and leadership positions at Argonne National Laboratory, concluding his tenure as the lab’s deputy director for science and technology. His time at Argonne included leading the Photon Sciences Directorate and serving as director of the Advanced Photon Source. At Argonne, Streiffer also helped to create and lead the Physical Sciences and Engineering Directorate and served in a leadership role in developing Argonne’s Center for Nanoscale Materials. Streiffer also served as co-director of the Department of Energy’s National Virtual Biotechnology Laboratory.