Marine Corps · MOS history

2161 Machinist

MOS 2161 merged into MOS 1321 (Fabrication Specialist). The recoding took effect on 2026-10-01.

Codes named in this history

Listed in today's directory

These codes have directory pages; their current use has not been reviewed, so no current claim is made here.

Documented history

Machinist

A Machinist fabricates, repairs, and modifies engineer, motor transport, and weapons equipment and accessories using machine tools and welding equipment. The machinist works from specifications and drawings, verifies accuracy with precision measuring devices, maintains shop equipment, and coordinates work with other repair shops.

2026-10-01 is the MARADMIN recoding date, not the date COOL removed its entry.

  • The manual retains the obsolete identifier because it can still appear in active-duty or reserve personnel records.
Source extraction notes

MOS 2161 merged into MOS 1321 (Fabrication Specialist). The recoding took effect on 2026-10-01. 2026-10-01 is the MARADMIN recoding date, not the date COOL removed its entry. The manual retains the obsolete identifier because it can still appear in active-duty or reserve personnel records.

Source documents (2)

Reviewed October 3, 2026 against references 1 and 2.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.