Mechanical Design, Analysis & Substantiation: Execute conceptual and detailed engineering activities using principles of engineering, physics, and materials science for design, analysis, manufacturing, and maintenance of mechanical systems. Therefore, for applicants who are not asylees, refugees, lawful permanent residents, or U.S. Citizens (i.e., not a protected individual under the Immigration and Naturalization Act, 8 U.S.C. 1324b(a)(3), otherwise known as a U.S. Person), final offers will be contingent on the ability to obtain authorization for access to U.S. export-controlled information from the U.S. Government.