Army · MOS history

21Z5 Combat Engineering Senior Sergeant

Converted to 12Z, dated October 1, 2010 by the source.

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12ZCombat Engineering Senior Sergeant

Documented history

Combat Engineering Senior Sergeant

DA Pam 611-21 Table 10-4 maps predecessor MOSC 21Z5 to 12Z; source successor entries: 12Z COMBAT ENGINEERING SENIOR SERGEANT; conversion effective 01 Oct 2010.

Source documents (1)

DA Pam 611-21, chapter 10, Table 10-4, Enlisted MOS Conversion Listing
1. Table 10-4, PDF p. 241 · source dated 2025
PDF page 241 (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.