Submarine Engineering Duty Breast Insignia:
The Submarine Engineering Duty Insignia is a badge of the United States Navy which is issued to Engineering Duty Officers who have been designated as qualified in submarines through a program administered by the Naval Sea Systems Command.

The Submarine Engineering Duty Insignia is only authorized to those officers who are members of the Engineering Duty Officer community who complete advanced training in submarine design/engineering, construction, quality control, combat system, nuclear marine propulsion, watertight integrity control, nuclear/non-nuclear systems testings, and systems management and analysis.

The Submarine Engineering Duty Insignia is only awarded after a service member completes the Submarine Engineering Duty Officer PQS (Personal Qualification Standards) which tests engineering knowledge in submarine design, operations, and maintenance. Those receiving the Submarine Engineering Duty Insignia are qualified as the Navy's lead submarine engineering experts.