Army · MOS history
Converted to 21P, dated September 1, 2004 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: 12P Prime Power Production Specialist, also listed in today's directory
Prime Power Production Specialist
DA Pam 611-21 Table 10-4 maps predecessor MOSC 52E3 to 21P; source successor entries: 21P PRIME POWER PRODUCTION SPECIALIST; conversion effective 01 Sep 2004.
1. Table 10-4, PDF p. 268 · source dated 2025
PDF page 268 (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.