Tasks involve the ability to exert moderate physical effort in to light to moderately heavy work, typically involving some combination of bending, reaching, stooping, or kneeling, and which may involve some lifting, carrying, pushing and/or pulling of objects and materials of moderately heavy weight (20-50 pounds). Applicants who qualify will be subject to an extensive selection process and screening program, which may include, but not be limited to evaluation of training and experience; written test; computer based test; interview; polygraph examination; psychological evaluation; employment record, fingerprint and background check; medical examination; and drug screen.