The development and evaluation of prototype hands-on equipment, job sample performance tests for a high skilled technical Military Occupational Specialty (MOS) are described. An electronic maintenance MOS (26C20) was used as the research vehicle. The results led to the conclusion that valid and reliable performance tests could be constructed, but that equipment, facilities, and standardization requirements reduce the feasibility of their use at other than an ideal location, such as a U.S. Army school. (Author/MV)