Army · MOS history
Converted to 21E, dated October 1, 2008 by the source.
Historical steps
The source names a code the branch later retired, or whose reviewed record is historical. Its story continues on that code's own page.
Recorded successor: 12N Horizontal Construction Engineer, also listed in today's directory
General Construction Equipment Operator
DA Pam 611-21 Table 10-4 maps predecessor MOSC 21J1 to 21E; source successor entries: 21E CONSTRUCTION EQUIPMENT OPERATOR; conversion effective 01 Oct 2008.
1. Table 10-4, PDF p. 240 · source dated 2025
PDF page 240 (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.