Leadership
Argonne integrates world-class science, engineering, and user facilities to deliver innovative research and technologies. We create new knowledge that addresses the scientific and societal needs of our nation.

Peter B. Littlewood
Peter B. Littlewood, Director, Argonne National Laboratory
Director, Argonne National Laboratory

Peter B. Littlewood is the Director of Argonne National Laboratory, one of the nation’s largest science and engineering research centers, and a Professor of Physics in the James Franck Institute at the University of Chicago. Dr. Littlewood came to Argonne in 2011 after being appointed Associate Laboratory Director of Argonne's Physical Sciences and Engineering directorate, which focuses on discovery science across a broad range of disciplines, and on creating and understanding new materials and chemistries that address the grand challenges in energy and the environment.

Alfred P. Sattelberger
Alfred P. Sattelberger, Deputy Laboratory Director for Programs
Deputy Laboratory Director for Programs

Alfred P. Sattelberger is the Deputy Laboratory Director for Programs at Argonne National Laboratory. He is responsible for the management and integration of the laboratory’s science and technology portfolio, strategic planning, and the Laboratory Directed Research and Development (LDRD) program.

Paul Kearns
Paul Kearns, Deputy Lab Director for Operations and Chief Operations Officer
Deputy Laboratory Director for Operations and Chief Operations Officer

Paul K. Kearns is Deputy Laboratory Director for Operations and Chief Operations Officer for the U.S. Department of Energy's Argonne National Laboratory. He brings nearly three decades of management experience to the position, as well as a strong background in science and engineering.

Mark Peters
Associate Laboratory Director
Associate Laboratory Director

Dr. Mark Peters is Argonne's Associate Laboratory Director for the lab's Energy Engineering and Systems Analysis Directorate, which is responsible for Argonne’s programs in energy research—including energy storage, renewable energy, energy efficiency and nuclear energy—and national security. Dr. Peters also serves as a senior advisor to the Department of Energy on nuclear energy technologies and research and development programs, and nuclear waste policy.

Rick Stevens
Rick Stevens, Associate Laboratory Director, Computing, Environment and Life Sciences
Associate Laboratory Director

Rick Stevens is Associate Laboratory Director for Computing, Environment and Life Sciences (CELS). Stevens oversees a research program that connects computing to several areas of inquiry, and heads Argonne's research initiatives for both exascale computing and computational biology. He is a professor in the Department of Computer Science at the University of Chicago, a Senior Fellow of the Computation Institute, and a Senior Fellow of the Institute for Genomics and Systems Biology.

Stephen Streiffer
Stephen Streiffer, Interim Associate Lab Director
Interim Associate Laboratory Director

Stephen Streiffer is the Interim Associate Laboratory Director for Photon Sciences at Argonne.

Harry Weerts
Harry Weerts, Interim Associate Laboratory Director, Physical Sciences and Engineering
Interim Associate Laboratory Director

Harry Weerts is the Interim Associate Laboratory Director for Physical Sciences and Engineering. He currently oversees Argonne’s interdisciplinary research programs in physics, chemistry, material science and nanotechnology. Weerts was formerly Director of Argonne’s High Energy Physics division, and prior to that, a collider physicist at Fermilab, where he was the spokesman for the Dzero experiment for six years.