Los Alamos National Laboratory

Los Alamos National Laboratory

Delivering science and technology to protect our nation and promote world stability

Principal Associate Director - Weapons Programs

As Principal Associate Director for the Weapons Program, Robert Webster leads the programs to assure the safety, security, and effectiveness of the systems in the nation’s nuclear stockpile.


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Under his leadership, the Lab's Weapons Program integrates planning and execution of the stockpile stewardship program, a critical mission of the Laboratory.

Robert Webster

Bob Webster

Under the leadership of Principal Associate Director for the Weapons Program, Robert (Bob) Webster, the LANL Weapons Program integrates planning and execution of the Stockpile Stewardship program, a critical mission of the Laboratory. (This mission includes physics and engineering design, small-scale research and development programs, plutonium sustainment activities, pit manufacturing, and leadership and oversight of multi-million dollar programs including Advanced Simulation and Computing, science campaigns, and directed stockpile work.)

Webster has held many leadership and management positions within the Weapons Physics directorate and is highly regarded across the National Nuclear Security enterprise for his expertise in simulation, theory, and experimental programs. He has shaped the direction of supercomputing here at Los Alamos and was a driver in the acquisition of the Roadrunner supercomputer.

Key Facts

  • Webster is a 26-year veteran of the Weapons Program at Los Alamos and a national leader in Stockpile Stewardship. Since 2012, he has served as the Associate Director for Weapons Physics, with responsibility for the vision, execution and integration of three programs: Advanced Simulation and Computing, Science Campaigns, and the Inertial Confinement Fusion program in weapons science.
  • He served as the Science Advisor to the NNSA Deputy Administrator for Defense Programs in Washington, DC. 
  • He was also a founding member and the first chair of the Predictive Capability Framework council, which supports the NNSA in developing the decadal view of required scientific advances for NNSA Defense Programs. This work contributes to the Stockpile Stewardship Management Plan, which is a recurring report from NNSA to Congress that outlines the direction of the stewardship program.

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