Essential Job Functions: Ability to perform the following (with or without reasonable accommodation): Speaking and hearing within normal ranges; sitting; standing; climbing stairs and ladders; bending; crouching; twisting; reaching overhead; gripping; typing; lifting/carrying 10-20 pounds; working outdoors; working overtime or irregular schedules; operating motor vehicles; working in noisy environments; working near ionizing and non-ionizing radiation; wearing required PPE including head, eye, and hearing protection; visually distinguishing colors. Due to federal restrictions contained in the current National Defense Authorization Act, citizens of the People's Republic of China, the Islamic Republic of Iran, the Democratic People's Republic of 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.