Army · MOS history

77L4 Petroleum Laboratory Specialist

Converted to 92L, dated September 1, 2004 by the source.

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92LPetroleum Laboratory Specialist

Documented history

Petroleum Laboratory Specialist

DA Pam 611-21 Table 10-4 maps predecessor MOSC 77L4 to 92L; source successor entries: 92L PETROLEUM LABORATORY SPECIALIST; 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. 285 · source dated 2025
PDF page 285 (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.