MOS Discription

Marine Corps (USMC) Enlisted Job Descriptions

OCCUPATIONAL FIELD 40, DATA SYSTEMS

The data systems OccFld includes computer systems analysis, software design, and computer and peripheral equipment operation functions in support of Marine Corps information systems.

Formal schooling is provided to Marines entering the data systems OccFld. Types of entry level jobs available include work as a programmer or as a small systems specialist.

There is a wide variety of billets available in the OccFld at divisions, wings, force service support groups, major posts and stations, and Headquarters Marine Corps.

The opportunity to serve in various category "B" jobs (MOSs 8000-9599) is also available. Marines entering this OccFld will receive MOS 4000, Basic Data Systems Marine.

They will participate in routine data systems functions while training for a designated MOS within the OccFld.

Primary MOS's

MOS Job Title Authorized Ranks

4066 Small Computer Systems Specialist MSgt to Pvt

4067 Programmer, ADA MSgt to Pvt

4099 Data Processing Chief MGySgt

Secondary MOS's (See Note Below)

4068 Data Network Technician MGySgt to Sgt

4076 Computer Security Specialist MGySgt to Cpl

Note: A secondary MOS is a "job within a job." It denotes a special skill or training that the Marine holds in addition to the general requirements of his/her Primary MOS.

Primary MOS's
MOS	Job Title	Authorized Ranks
4066	Small Computer Systems Specialist	MSgt to Pvt
4067	Programmer, ADA	MSgt to Pvt
4099	Data Processing Chief	MGySgt
Secondary MOS's (See Note Below)
4068	Data Network Technician	MGySgt to Sgt
4076	Computer Security Specialist	MGySgt to Cpl
Note: A secondary MOS is a "job within a job." It denotes a special skill or training that the Marine holds in addition to the general requirements of his/her Primary MOS.