The problems that ASC solves for Science-Based Stockpile Stewardship span the activities and responsibilities of the Department of Energy’s National Nuclear Security Administration’s three Defense Programs laboratories (Los Alamos, Sandia, and Lawrence Livermore). Cooperation among the Defense Programs laboratories is essential to solving these problems in an efficient and effective manner. In accordance with this cooperative philosophy, representatives of the laboratories have participated in the ASC planning process. There has been, and will continue to be, unprecedented cooperation among the three Defense Programs laboratories.
The ASC program is implemented by project leaders at each of the laboratories, guided by the Office of Advanced Simulation and Computing and Institutional Research and Development under the Deputy Administrator for Defense Programs. The weapon laboratories share their resources across laboratory boundaries in joint development efforts.
ASC @ Lawrence Livermore 
ASC @ Los Alamos 
ASC @ Sandia