The Office of International Nuclear Safeguards develops and supports the policies, concepts, technologies, expertise, and international safeguards infrastructure necessary to strengthen and sustain the international safeguards system as it evolves to meet new challenges. Programs in the office work with the National Laboratories, International Atomic Energy Agency (IAEA), and with international partners
https://nnsa.energy.gov/aboutus/ourprograms/nonproliferation-0/npac/safeguards