Navy Officer designator · Engineering
653X Civil Engineering Corps LDO
Current service use not established
This code is listed in the directory. Inclusion alone does not confirm current service use.
A Navy officer classification, not an enlisted rating.
Overview
Civil Engineer Corps Limited Duty Officers support the expeditionary warfighting capability and readiness of Naval Expeditionary Forces through leadership and technical proficiency. They may serve in engineering positions afloat and ashore across the naval construction and public works communities.
Notes & Sources
- NOOCS Part A (Edition 96, Jul 2026) prints officer code 653X as “A Limited Duty Officer of the Civil Engineer Corps (Warfare)…”, paired with its Limited Duty Officer billet row (billet 6530 requiring the specialty); the row states who holds the code and which specialty the billet requires, not what duties every holder performs. See the cited block for the exact pairing text.
- Because the Navy carries no duty, training, or clearance prose at designator level, occupation-specific recommendations are not published here; a 653X officer’s duties depend on the assigned billet.
Evidence for this guidance (1 document)
- NAVPERS 15839I Vol I Part A · Billet and Officer Designator Codes (NOOCS Edition 96, Jul 2026)
[1] Part A officer designator table, block 653X, cached text line 897
Supports: Specialty definition
Source review recorded September 24, 2026.
Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.
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