Department of Energy The Department of Energy's overarching mission is to advance the national, economic and energy security of the United States; to promote scientific and technological innovation in support of that mission; and to ensure the environmental cleanup of the national nuclear weapons complex. DOE is home to America's national labs, where 30,000 scientists and engineers work to secure our energy, economic and national security through cutting-edge technology. The U.S. Department of Energy's primary laboratory for materials research has joined the agency's national laboratory complex as the newest branch of the National Energy Technology Laboratory (NETL) located in Albany, Oregon » Department of Energy Website