The Physical Sciences Directorate (PHY SCI) at LLNL is a leader in frontier physics and technology for 21st-century national security missions: stockpile stewardship, homeland security, energy independence, and the exploration and use of space.

Our people and resources make it possible for the
Laboratory to take on these demanding missions,
and anticipate and respond to challenges to the nation. "Passion for Mission"-a fundamental value shared by
all Laboratory staff-and vitality in the scientific and
technical work force go hand in hand.