The Marine Corps Military Occupational Specialty (MOS) 2641 is for Cryptologic Language Analysts. These analysts are part of Occupational Field 26, which is Signals Intelligence/Ground Electronic Warfare. Their duties include:
Monitoring, transcribing, and translating intercepted foreign communications
Collecting, processing, exploiting, analyzing, and reporting on designated foreign communications
Supporting the MAGTF at both team and battalion levels
Installing, operating, and performing preventive maintenance on programs
Cryptologic linguists interpret messages to provide insight and intelligence to decision makers. Their work focuses on strategic and tactical intelligence, including listening to radio and other broadcasts to determine enemy positions.