Lawrence Livermore National Laboratory (LLNL) is a federal research facility that is part of the National Nuclear Security Administration (NNSA) within the United States Department of Energy (DOE). The laboratory is located in Livermore, California and is responsible for ensuring the safety, security, and reliability of the nation's nuclear weapons stockpile. LLNL also conducts research in a variety of other areas, including energy, climate, and national security. The laboratory employs over 6,500 people, including scientists, engineers, and support staff. LLNL is managed by Lawrence Livermore National Security, LLC, a partnership between the University of California, Bechtel National, BWX Technologies, and AECOM.