Todd E. Combs

Todd Combs, Director Global Security Sciences Division Argonne National Laborator


Global Security Sciences
Argonne National Laboratory

Todd E. Combs is Director of the Global Security Sciences (GSS) Division at Argonne National Laboratory. In addition, he is currently the Interim Associate Laboratory Director for Energy and Global Security at Argonne National Laboratory. He is responsible for the management and integration of the Laboratory’s energy and global security programs.

As the Associate Laboratory Director, he manages an organization of more than 800 staff with an annual budget of over 280 million dollars, including GSS. Dr. Combs came to Argonne from Oak Ridge National Laboratory, where he served as group leader of the Transportation Planning and Decision Science Group. His research has spanned energy systems analysis for DOE sponsors and the application of modeling and simulation techniques to national and homeland security issues for Department of Defense and Department of Homeland Security sponsors.

Dr. Combs is a member of the Institute for Operations Research and the Management Sciences (INFORMS) and the Military Operations Research Society (MORS). He holds a master’s degree and a Ph.D. in operations research from the Air Force Institute of Technology. He is a graduate of the U.S. Military Academy at West Point. His military experience includes assignments at Air Force Research Laboratory, the Air Force Office of Scientific Research, and the Air Force Studies and Analyses Agency.

George Vukovich

George Vukovich, Deputy Division Director, Global Security Sciences

Deputy Director

Global Security Sciences
Argonne National Laboratory

George Vukovich is responsible for the operational aspect of the Global Security Sciences Division.  He brings 35 years of project and operations management experience to the position with experience on both federal projects as well as private industry.

Leah B. Guzowski

Leah Guzowski

Director, Strategic Programs

Global Security Sciences
Argonne National Laboratory

Leah Guzowski creates, develops and executes ideas by building cross-disciplinary and cross-institutional teams to solve pressing challenges associated with a range of energy and global security issues.  Her research includes the development of methods, technologies, tools and analyses to inform energy security issues, with a particular emphasis on economic, policy, climate change and geo-political considerations.  Prior to joining Argonne, her work spanned private industry and international trade development and policy.  She maintains a proactive interest in laboratory-to-commercialization ventures in various sectors.  Leah Guzowski studied economics and policy at the University of Oxford (UK) and she is a graduate of the University of Wisconsin- Madison and Harvard University.

David Brannegan

Dave Brannegan

Center Director, Risk and Infrastructure Science Center

Global Security Sciences
Argonne National Laboratory

David (Dave) Brannegan is the Director of the Risk and Infrastructure Science Center (RISC) at Argonne National Laboratory. In this role, he heads a multi-disciplinary team of scientists and engineers in conducting applied research to deliver risk management and resilience analysis capabilities that inform stakeholder decision making. RISC focuses on the following four core research areas: infrastructure science, cyber analysis and operations, threat analysis, and emergency preparedness. During his tenure at Argonne, Mr. Brannegan has led a variety of work-for-others programs for the Department of Homeland Security (DHS), including a comprehensive effort to prioritize critical infrastructure based on criticality, near-real-time analysis of threats to infrastructure assets, and continued analysis of systemic infrastructure dependencies.

Dave has considerable program management, policy, and leadership experience in the non-profit, for-profit, and government sectors. Prior to his role as Center Director at Argonne, he was a Branch Chief at DHS. In that capacity, he oversaw the design, development, and implementation of more than 20 individual technical assistance programs that enhanced State and local preparedness capabilities nationwide. Dave also co-founded the Fusion Process Technical Assistance program with the U.S. Department of Justice. Other previous positions involved conducting international counter-proliferation analysis for Computer Sciences Corporation, as well as assessment of multi-lateral export control and U.S.- European relations for the Henry L. Stimson Center, a D.C.-based think tank.

Dave received a Bachelor’s degree in political science from the College of the Holy Cross and a Master’s degree in International Relations from the Maxwell School of Citizenship and Public Affairs at Syracuse University. In 2013, Mr. Brannegan successfully completed the Strategic Laboratory Leadership Program at the Booth School of Business, University of Chicago.

Peter Heine

Pete Heine, Director, Strategic Security Center Global Security Sciences Argonne National Laboratory

Center Director, Center for Strategic Security

Global Security Sciences
Argonne National Laboratory

Peter Heine leads the Center for Strategic Security, which helps identify, plan, and implement solutions to forestall long-term security threats, especially those related to proliferation of strategic weapons or exploitation of critical vulnerabilities. He is also seconded to the World Customs Organization as a Strategic Trade Control Enforcement National Expert. His personal focus is on realizing effective implementation of nonproliferation policies, especially strategic dual-use trade control. He has led technical partnerships with numerous countries, mostly in Europe, and international organizations.

Pete’s professional experience includes over 20 years working at Argonne on export control and other nonproliferation projects. He started his professional career serving as an officer in the U.S. Navy’s nuclear propulsion program and also worked for a management consulting firm specializing in the strategic application of technology. Peter Heine received his B.S. in Applied and Engineering Physics from Cornell University and his MBA from The University of Chicago.

John Hummel


Director, Center for Integrated Resiliency Analysis

Global Security Sciences
Argonne National Laboratory

John R. Hummel is the Director of the Center for Integrated Resiliency Analyses (CIRA) in the Global Security Sciences (GSS) division at Argonne. Dr. Hummel is also a Senior Fellow at the Computation Institute of The University of Chicago. He has over 30 years of experience in developing and using modeling and simulation applications in a variety of military domains, such as environmental representations, logistics, simulation architectures, and the impacts of climate change on National Security. He led the development of efforts to create a framework for assessing societal and regional resiliency and has also supported activities analyzing critical resilient infrastructures. Dr. Hummel has a Ph.D. in Atmospheric Science from the University of Michigan and a M.S. in Meteorology and B.S. with Honors Option in Engineering Science from the Pennsylvania State University.

Pamela J. Sydelko

Pamela Sydelko, Director

Director, System Science Center

Global Security Sciences
Argonne National Laboratory

Pamela Sydelko is the Director of the Systems Science Center, which is part of the Global Security Sciences Division at Argonne National Laboratory. She is also a PhD Research Student at the Centre for Systems Studies, University of Hull, United Kingdom. She has 28 years of experience in systems science and analysis and has led the development of numerous innovative modeling, analysis and decision support technologies, focusing on integrated multi-component software systems. Key modeling/analysis domains include national security, sustainability, and critical infrastructures.

Previously, Pamela has served as the Deputy Associate Laboratory Director for the Energy Engineering & Systems Analysis Directorate and Director for the Argonne’s National Security Program, developing strategies that build Argonne’s research capabilities and fostering valuable science and technology research for the National Security Community.

Pamela Sydelko earned her MBA from the University of Chicago, her M.S. in Soil Science from the University of Illinois at Urbana-Champaign, and her B.S. in Botany/Ecology from North Dakota State University. She joined Argonne in October 1989, coming from the U.S. Army Engineering Research and Development Center – Construction Engineering Research Laboratory (CERL) in Champaign-Urbana.