Army · MOS history

12Z5 Combat Engineering Senior Sergeant

Converted to 21Z, dated September 1, 2004 by the source.

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Codes named in this history

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21Z stated by the source. No directory or archive record matches.

Documented history

Combat Engineering Senior Sergeant

DA Pam 611-21 Table 10-4 maps predecessor MOSC 12Z5 to 21Z; source successor entries: 21Z COMBAT ENGINEERING SENIOR SERGEANT; conversion effective 01 Sep 2004.

Source documents (1)

DA Pam 611-21, chapter 10, Table 10-4, Enlisted MOS Conversion Listing
1. Table 10-4, PDF p. 224 · source dated 2025
PDF page 224 (opens in a new tab)

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