The mission of the U. S. Department Energy (DOE) is to ensure America’s security and prosperity by addressing its energy, environmental and nuclear challenges through transformative science and technology solutions. Only here will you have access to career opportunities that impact these areas, while serving your country. The Energy Department's mission speaks to all sectors of the economy. Whether your expertise is in science, technology, engineering, national security, international affairs or business, the Energy Department offers challenging and innovative work environments. Headquartered in Washington, D.C., DOE operates research laboratories, power marketing administrations, and site offices across the nation.