The Marine Corps has three types of commissioned officers: Warrant Officers, Limited Duty Officers, and Unrestricted Line Officers.
Below are the job descriptions for Marine Corps commissioned officers in Occupational Field 06, Communications.
Warrant Officer Jobs:
0610 -- Telephone Systems Officer
0620 -- Tactical Communications Planning and Engineer Officer
0640 -- Strategic Spectrum Planner
0650 -- Network Operations and Systems Officer
Limited Duty Officer Jobs:
0650 -- Network Operations and Systems Officer
Unrestricted Line Officer Jobs:
0602 -- Communications Officer
0603 -- C4 Planner
