Due to federal restrictions contained in the current National Defense Authorization Act, citizens of the People's Republic of China-including the special administrative regions of Hong Kong and Macau-as well as citizens of the Islamic Republic of Iran, the Democratic People's Republic of Korea (North Korea), and the Russian Federation, who are not Lawful Permanent Residents ("green card" holders) are prohibited from accessing facilities that support the mission, functions, and operations of national security laboratories and nuclear weapons production facilities, which includes Los Alamos National Laboratory. Work Environment: In a widely ranging ambient temperatures, work in areas controlled for radioactive contamination and/or radiation exposure, work in a noisy environment, work near electrical power supplies, work near machinery with moving parts, safety glasses or eye protection, hearing protection, safety shoes or protective footgear, potential for frequent domestic travel to NCERC (NV).