The National Infrastructure Simulation and Analysis Center (NISAC) is a modeling, simulation, and analysis program within the Department of Homeland Security comprising personnel in the Washington, D.C., area, as well as from Sandia National Laboratories, Los Alamos National Laboratory, and Pacific Northwest National Laboratory.
NISAC prepares and shares analyses of critical infrastructure, including their interdependencies, vulnerabilities, consequences, and other complexities, under the direction of the Office of Infrastructure Protection (IP), Infrastructure Analysis and Strategy Division (IASD).