25P is a military Occupational Specialty code in the United States Army Signal Corps for the job "Microwave Systems Operator/Maintainer". (Prior to Oct 2004, the MOS was called 31P.) "Major duties. The microwave systems operator-maintainer supervises, installs, operates, and maintains microwave communications systems, and associated antennas, multiplexing, and communication security equipment. Performs engineering quality control and continuity testing of circuits, trunks, links, systems, and facilities."