Knowledge of telecommunications and electronics principles and practices to perform duties on any one of the following areas: electronic surveillance between tempest and intrusion detection; electronic communications systems such as wireless networks; local area networks; wide area networks; electronic security (physical, cryptographic, tempest, intrusion detection, and access control); forensic audio and video analysis and operability; telephone facilities (line types, characteristics, and distribution systems); interception and, electrical systems to prepare necessary schematics for repairing electronic equipment. Perform technical work in various areas of specialization and functional areas including, but not limited to, electronic surveillance, data network, video analysis, image, audio, wireless, networking, electronic security, microwave etc., to handle routine and well defined special assignments.