Science and Security Board


Lynn Eden
Lynn Eden (Co-Chair)

Senior Research Scholar (Emerita) at Stanford University’s Center for International Security and Cooperation. Eden is also co-chair of U.S. Pugwash and a member of the International Pugwash Council. Her scholarly work focuses on the military and society, and nuclear weapons history and policy, including nuclear abolition. Eden’s Whole World on Fire: Organizations, Knowledge, and Nuclear Weapons Devastation won the American Sociological Association’s 2004 Robert K. Merton award for best book in science and technology studies.

Rod Ewing


Rod Ewing

Ewing is the Frank Stanton Professor in Nuclear Security in the Center for International Security and Cooperation in the Freeman Spogli Institute for International Studies and a Professor in the Department of Geological and Environmental Sciences in the School of Earth Sciences at Stanford University. Ewing’s research focuses on the back end of the nuclear fuel cycle, mainly nuclear materials and the geochemistry of radionuclides. He is the past president of the International Union of Materials Research Societies. Ewing has written extensively on issues related to nuclear waste management and is co-editor of Radioactive Waste Forms for the Future and Uncertainty Underground: Yucca Mountain and the Nation’s High-Level Nuclear Waste. He received the Lomonosov Medal of the Russian Academy of Sciences in 2006. He was recently appointed by President Barack Obama to chair the Nuclear Waste Technical Review Board.

Sivan Kartha


Sivan Kartha

Kartha is a Senior Scientist at the Stockholm Environment Institute and Co-leader of an institute-wide theme Managing Climate Risks. His research and publications for the past fifteen years have focused on technological options and policy strategies for addressing climate change, and he has concentrated most recently on equity and efficiency in the design of an international climate regime. Kartha also works on mitigation scenarios, market mechanisms for climate actions, and the environmental and socioeconomic impacts of biomass energy. His work has enabled him to advise and collaborate with diverse organizations, including the UNFCCC Secretariat, various United Nations and World Bank programs, numerous government policy-making bodies and agencies, foundations, and civil society organizations throughout the developing and industrialized world. He is currently serving as a Coordinating Lead Author for the Intergovernmental Panel on Climate Change.

Herb Lin

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Lin is senior research scholar for cyber policy and security at the Center for International Security and Cooperation and Research Fellow at the Hoover Institution, both at Stanford University. He is particularly interested in the use of offensive operations in cyberspace, especially as instruments of national policy.

Suzet McKinney


McKinney is the Executive Director of the Illinois Medical District Commission. She is the former Deputy Commissioner of the Bureau of Public Health Preparedness and Emergency Response at the Chicago Department of Public Health, where she oversaw the emergency preparedness efforts for the department and coordinated those efforts within the larger spectrum of Chicago’s public safety activities. A sought-after expert in her field, McKinney also provides support to the U.S. Department of Defense, Defense Threat Reduction Agency, to provide subject matter expertise in biological terrorism preparedness to international agencies.

Steven Miller


Miller is the Director of the International Security Program at Harvard University’s Belfer Center for Science and International Affairs, and he is a Fellow of the American Academy of Arts and Sciences where he co-chairs the Committee on International Security Studies (CISS). Miller is also Co-Chair of the U.S. Pugwash Committee, and is a member of the Council of International Pugwash. Miller co-directs the Academy's project on the Global Nuclear Future Initiative with the Bulletin’s Science and Security Board Co-Chair, Robert Rosner.

Raymond T Pierrehumbert


Pierrehumbert is Halley Professor of Physics at the University of Oxford. He was a lead author on the IPCC Third Assessment Report, and a co-author of the National Research Council report on abrupt climate change. He was awarded a John Simon Guggenheim Fellowship in 1996, which was used to launch collaborative work on the climate of Early Mars with collaborators in Paris. He is a Fellow of the American Geophysical Union (AGU), and has been named Chevalier de l'Ordre des Palmes Académiques by the Republic of France. Pierrehumbert's central research interest is how climate works as a system and developing idealized mathematical models to be used to address questions of climate science such as how the earth kept from freezing over: the faint young sun paradox. Current interests include climate of extrasolar planets.


Ramamurti \"Doug\" Rajaraman
Ramamurti Rajaraman

Rajaraman is an emeritus professor of physics at Jawaharlal Nehru University and a co-chair of the International Panel on Fissile Materials. His research areas include particle physics, quantum field theory, and solitons. He has written about fissile material production in India and Pakistan and the radiological effects of nuclear weapon accidents.

Robert Rosner (Co-Chair)


Rosner is the William E. Wrather Distinguished Service Professor in the Department of Astronomy and Astrophysics and Physics at the University of Chicago. Rosner recently stepped down as Director of Argonne National Laboratory, where he had also served as Chief Scientist. His research is mostly in the areas of plasma astrophysics and astrophysical fluid dynamics and magnetohydrodynamics (including especially solar and stellar magnetic fields); high energy density physics; boundary mixing instabilities; combustion modeling; applications of stochastic differential equations and optimization problems; and inverse methods


Jennifer Sims
Jennifer Sims

Sims is currently a senior fellow at the Chicago Council on Global Affairs and is writing a book on intelligence in international politics. She is also a consultant on intelligence and homeland security for private corporations and the US government. In 2008, the president of the United States appointed her to the Public Interest Declassification Board, which advises the president on the declassification policies of the US government.  Sims received her MA and her PhD from Johns Hopkins University’s School of Advanced International Studies. In 1998, Sims received the intelligence community’s highest civilian award, the National Distinguished Service Medal.

Susan Solomon

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Solomon is the Ellen Swallow Richards Professor of Atmospheric Chemistry and Climate Science at the Massachusetts Institute of Technology and was the Founding Director of the MIT Environmental Solutions Initiative from 2014-2015. She is well known for pioneering work that explained why there is a hole in the Antarctic ozone layer and is the author of several influential scientific papers in climate science. Solomon received the 1999 US National Medal of Science, our nation’s highest scientific award, in 1999. She has also received the Grande Medaille of the French Academy of Sciences, the Blue Planet Prize in Japan, the BBVA Frontiers of Knowledge Award, and the Volvo Environment Prize. She is a member of the US National Academy of Sciences, the French Academy of Sciences, and the Royal Society in the UK. She served as co-chair for the Intergovernmental Panel on Climate Change (IPCC) fourth climate science assessment report, released in 2007. Time magazine named Solomon as one of the 100 most influential people in the world in 2008.

Richard Somerville


Richard Somerville

Somerville is Distinguished Professor Emeritus and Research Professor at Scripps Institution of Oceanography, University of California, San Diego. His research is focused on critical physical processes in the climate system, especially the role of clouds and the important feedbacks that can occur as clouds change with a changing climate. His broader interests include all aspects of climate, including climate science outreach and the interface between science and public policy. He was a Coordinating Lead Author of the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). The IPCC shared the 2007 Nobel Peace Prize equally with Al Gore.

Sharon Squassoni


Squassoni currently directs the Proliferation Prevention Program at the Center for Strategic and International Studies in Washington, DC. She has specialized in nuclear nonproliferation, arms control and security policy for three decades, at the Arms Control and Disarmament Agency, the State Department, and the Congressional Research Service.  She has also held positions at the Institute for Defense Analyses, the Carnegie Endowment for International Peace, and Newsweek magazine.  She received a Bachelor of Arts degree from the State University of New York at Albany, a master’s in public management from the University of Maryland, and a master’s in national security strategy from the National War College.

David Titley


Titley is a nationally known expert in the field of climate, the Arctic, and National Security.  He served as a naval officer for 32 years and rose to the rank of Rear Admiral. Titley’s career included duties as Commander, Naval Meteorology and Oceanography Command, Oceanographer and Navigator of the Navy, and Deputy Assistant Chief of Naval Operations for Information Dominance.  While serving in the Pentagon, Titley initiated and led the US Navy’s Task Force on Climate Change.  After retiring from the Navy, Titley served as the Deputy Undersecretary of Commerce for Operations, the Chief Operating Officer position at the National Oceanic and Atmospheric Administration. Titley has spoken across the country and throughout the world on the importance of climate change as it relates to National Security.  The Department of Defense requested he present on their behalf at both Congressional Hearings and the Intergovernmental Panel on Climate Change (IPCC) meetings from 2009 to 2011. Titley is a member of the Hoover Institution's Arctic Security Initiative, and serves on the Advisory Boards of the Applied Research Laboratory at Penn State, the Center for Climate and Security, Columbia University's Center for Research on Environmental Decisions, and the Association of Climate Change Officers.  He is a member of the National Academies of Science committee on Geoengineering and the Center for Naval Analysis' Military Advisory Board and co-chairs the National Research Council's "A Decadal Survey of Ocean Sciences" committee.