Ability to perform job duties that require standing, kneeling, crouching, twisting upper body, working in cramped positions in small opening and climbing hand over hand, lifting 25 lbs., and working on ladders/lifts at elevated heights. To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.