Siegfried S. Hecker is a professor emeritus (research) in the Department of Management Science and Engineering and a senior fellow emeritus at the Freeman Spogli Institute for International Studies (FSI). He was co-director of CISAC from 2007-2012. From 1986 to 1997, Dr. Hecker served as the fifth Director of the Los Alamos National Laboratory. Dr. Hecker is an internationally recognized expert in plutonium science, global threat reduction, and nuclear security.

Dr. Hecker’s current research interests include nuclear nonproliferation and arms control, nuclear weapons policy, nuclear security, the safe and secure expansion of nuclear energy, and plutonium science. At the end of the Cold War, he has fostered cooperation with the Russian nuclear laboratories to secure and safeguard the vast stockpile of ex-Soviet fissile materials. In June 2016, the Los Alamos Historical Society published two volumes edited by Dr. Hecker. The works, titled Doomed to Cooperate, document the history of Russian-U.S. laboratory-to-laboratory cooperation since 1992.

Dr. Hecker’s research projects at CISAC focus on cooperation with young and senior nuclear professionals in Russia and China to reduce the risks of nuclear proliferation and nuclear terrorism worldwide, to avoid a return to a nuclear arms race, and to promote the safe and secure global expansion of nuclear power. He also continues to assess the technical and political challenges of nuclear North Korea and the nuclear aspirations of Iran.

Dr. Hecker joined Los Alamos National Laboratory as graduate research assistant and postdoctoral fellow before returning as technical staff member following a tenure at General Motors Research. He led the laboratory's Materials Science and Technology Division and Center for Materials Science before serving as laboratory director from 1986 through 1997, and senior fellow until July 2005.

Among his professional distinctions, Dr. Hecker is a member of the National Academy of Engineering; foreign member of the Russian Academy of Sciences; fellow of the TMS, or Minerals, Metallurgy and Materials Society; fellow of the American Society for Metals; fellow of the American Physical Society, honorary member of the American Ceramics Society; and fellow of the American Academy of Arts and Sciences.

His achievements have been recognized with the Presidential Enrico Fermi Award, the 2020 Building Bridges Award from the Pacific Century Institute, the 2018 National Engineering Award from the American Association of Engineering Societies, the 2017 American Nuclear Society Eisenhower Medal, the American Physical Society’s Leo Szilard Prize, the American Nuclear Society's Seaborg Medal, the Department of Energy's E.O. Lawrence Award, the Los Alamos National Laboratory Medal, among other awards including the Alumni Association Gold Medal and the Undergraduate Distinguished Alumni Award from Case Western Reserve University, where he earned his bachelor's, master's, and doctoral degrees in metallurgy.

David Straub was named associate director of the Korea Program at the Walter H. Shorenstein Asia-Pacific Research Center (Shorenstein APARC) on July 1, 2008. Prior to that he was a 2007–08 Pantech Fellow at the Center. Straub is the author of the book, Anti-Americanism in Democratizing South Korea, published in 2015.

An educator and commentator on current Northeast Asian affairs, Straub retired in 2006 from his role as a U.S. Department of State senior foreign service officer after a 30-year career focused on Northeast Asian affairs. He worked over 12 years on Korean affairs, first arriving in Seoul in 1979.

Straub served as head of the political section at the U.S. embassy in Seoul from 1999 to 2002 during popular protests against the United States, and he played a key working-level role in the Six-Party Talks on North Korea's nuclear program as the State Department's Korea country desk director from 2002 to 2004. He also served eight years at the U.S. embassy in Japan. His final assignment was as the State Department's Japan country desk director from 2004 to 2006, when he was co-leader of the U.S. delegation to talks with Japan on the realignment of the U.S.-Japan alliance and of U.S. military bases in Japan.

After leaving the Department of State, Straub taught U.S.-Korean relations at the Johns Hopkins University's School of Advanced International Studies in the fall of 2006 and at the Graduate School of International Studies of Seoul National University in spring 2007. He has published a number of papers on U.S.-Korean relations. His foreign languages are Korean, Japanese, and German.