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Stephen K. Streiffer

Laboratory Director (since October 2023), Oak Ridge National Laboratory

Stephen K. Streiffer is the director of Oak Ridge National Laboratory (ORNL), the U.S. Department of Energy laboratory whose missions span neutron science, high-performance computing, advanced materials, energy, nuclear science and national security research. Streiffer's own scientific work is in nanostructured complex oxides and the structural characterization of materials with electron microscopy and X-ray scattering.1

At a glance

Current role
Laboratory Director (since October 2023)
Sector
Government lab or agency
Education
Stanford
Work listed
1
Honors
1
Sources cited
2
Profile reviewed

Career

Streiffer spent 24 years at Argonne National Laboratory in research and leadership roles. There Streiffer led the Photon Sciences Directorate and directed the Advanced Photon Source, a DOE Office of Science X-ray user facility, and helped lead its upgrade; the final Argonne post was deputy director for science and technology.1

In June 2022 Streiffer joined Stanford University as the vice president responsible for oversight of SLAC National Accelerator Laboratory and served as SLAC's interim director. Streiffer came to Oak Ridge in October 2023 as laboratory director, a role ORNL's leadership page lists today.12

Research and facilities

From 2000 to 2009 Streiffer had a leadership role in developing Argonne's Center for Nanoscale Materials, another Office of Science user facility, and later helped create and lead Argonne's Physical Sciences and Engineering Directorate. Streiffer's research expertise covers nanostructured complex oxides and materials characterization by transmission electron microscopy and X-ray scattering.1

From March 2020 through May 2022, Streiffer was co-director of DOE's National Virtual Biotechnology Laboratory, a consortium of the national labs that worked on testing, treatment, epidemiological modeling and supply-chain problems during the COVID-19 pandemic.1

Work and contributions

  • Advanced Photon Source

    Directed Argonne's Advanced Photon Source, a DOE Office of Science X-ray user facility, and helped lead the upgrade that improved its photon performance.1

Timeline

  1. Began a leadership role in developing Argonne's Center for Nanoscale Materials, continuing through 2009.1
  2. Became co-director of DOE's National Virtual Biotechnology Laboratory, serving through May 2022.1
  3. Joined Stanford University as vice president responsible for oversight of SLAC National Accelerator Laboratory.1
  4. Became director of Oak Ridge National Laboratory.1

Other documented roles

Roles the sources document that are not confirmed as current.

  • Stanford vice president responsible for oversight of SLAC, then interim director of SLAC (2022–2023), SLAC National Accelerator Laboratory (Stanford University)1
  • Research and leadership positions over 24 years, concluding as deputy director for science and technology, Argonne National Laboratory1

Honors and recognition

  • Fellow of the American Physical Society · American Physical Society1

Where they work

Suggest a correction or removal

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References

2 sources · profile reviewed Oct 21, 2026 · data updated Oct 21, 2026

  1. Stephen K. Streiffer — staff profileOak Ridge National Laboratory · Official page · accessed Oct 21, 2026 · reviewed Oct 21, 2026
  2. ORNL leadership teamOak Ridge National Laboratory · Official page · accessed Oct 21, 2026 · reviewed Oct 21, 2026