Cryptologic linguists monitor, transcribe, and translate intercepted target communications; perform analysis and exploitation of designated foreign communications; and install, operate, and perform preventive maintenance of intercept equipment. Following the basic Qualification as a linguist (MOSs 2772-2798), Marines attend a specialized course of instruction and upon completion are assigned the appropriate MOS.

Duties of the SIGINT/EW chiefs encompass management and supervision of collection management, the management/deployment of SIGINT/EW assets, and planning for operations/exercises. SIGINT/EW chiefs also supervise the activities of personnel engaged in performing communications intercept, electronic reconnaissance, radio direction finding, analysis and reporting functions, COMSEC, and other EW roles.