Climate Change Council

Stephen D. Ambrose

Chief Climate Scientist, SAIC

Stephen D. Ambrose has been a meteorologist, physical scientist, and program manager in his long federal and private sector career. He has directed teams and groups in the development of science and technology research and reapplications in Earth Science. He now serves as Chief Climate Scientist at SAIC. His research and application interests include: natural disaster reduction; climate data and information, and implications of a changing climate on people, ecosystems, and the planet.

From 1978 to 2014 he worked for the National Oceanic and Atmospheric Administration (NOAA), the National Aeronautics and Space Administration (NASA), the Department of Interior Fish and Wildlife Service and antecedent agencies. After years of work related to meteorology, climatology, and oceanography at the National Ocean Service, National Weather Service, and the National Environmental Satellite Data and Information Service, he joined the Department of Interior Fish and Wildlife Service as Director of the National Wetlands Inventory Center, from there he joined NASA as Program Executive for Disasters in the Science Mission Directorate encouraging applications of NASA’s cadre of satellite and airborne missions towards decision support systems for government and private industry. In 2008 he was awarded NASA’s Exceptional Achievement Medal for efforts responding to the nation’s weather and wildfire disasters.  He retired from civil service in 2014 as NOAA’s Data Operations Manager in the development of their geostationary satellite ground system supporting satellite ingest and product generation.

From 2014 to now, he worked in private industry as Program Manager and Director supporting NOAA, NASA, and the EPA missions in operations, research and development.  This included working at NASA’s Center for Climate Simulation developing services to access downscaled climate information and working to utilize NASA’s supercomputer cloud services to support Arctic climate research.  At NOAA’s Office of Oceanic and Atmospheric Research, he led a program of over 50 specialists, analysts and scientists supporting the Climate Program Office, Sea Grant, the Weather Program Office, and the Uncrewed Systems Research office.  In 2018, joining Woolpert, a geospatial and architecture firm, as Program Director for Government Solutions, he supported the firm’s work with critical infrastructure, natural disasters, GIS, and information systems.  Lastly, joining General Dynamics Information Technology in late 2019, he led a group of scientists and engineers at the EPA supporting research and development in geographic information, environmental protection, chemical analysis, and disaster resilience.  Now at SAIC he leads the growth of a climate program office supporting federal, industry, state, and local customers as well as utilizing SAIC’s deep experience in science and technology for solutions to benefit society.

He received a B.S. in General Physical Sciences that included meteorology, geology, and astronomy from the University of Maryland in 1977, and did graduate studies in geography and climatology at the University of Maryland, Geography Department from 1981 to 1985.

Tristan Bannon

Tristan Bannon

Executive Director, Renewable Energy and Climate Change, Leidos

Tristan Bannon is Leidos’ Executive Director for Renewable Energy and Climate Change. In this role he is responsible for developing and executing an externally focused strategy to deploy Leidos’ world class technologies, technical expertise and delivery abilities to help clients mitigate and adapt to the impacts of climate change. His primary areas of focus are renewable energy technologies, climate data modernization, smart installations and infrastructure, strategies to electrify transportation, and the impact of climate change on national security.

Prior to joining Leidos, Tristan served at CACI International, most recently as a Vice President in their Engineering Solutions and Services operating group where in five years he was instrumental in securing over $5B in new single award contract wins. Prior to that Tristan held spent over ten years in leadership, management, growth, and technical roles at KGS Inc. and Lockheed Martin.

In addition to his role at Leidos, Tristan serves as the Vice Chair of the Washington Executive Climate Change Council and participates in numerous industry advisory and trade association.

Tristan holds a Master of Science in Computer Science from the Johns Hopkins University Whiting School of Engineering, as well as a Bachelor of Science in Computer Science from the University of California at Santa Barbara. He resides in Arlington, VA with his wife and two children.