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Marine Corps MOS · Support

55XX Musician

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A musician performs on a musical instrument in a Marine Corps band during concerts, parades, band drills, honor guards, guard mounts, and other official functions and ceremonies. Musicians also train personnel, maintain musical equipment, and may serve as section leaders, supply NCOs, music librarians, storeroom keepers, or arrangers.

Core Skills

  • Ceremonial and marching band performance
  • Musical arranging and section leadership
  • Preventive maintenance of musical equipment

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Musicians and Singers

Marine band instrumental performance at concerts, parades, and official ceremonies transfers directly to civilian ensemble and live-performance work.

How to prepare: Prepare an audition recording on your primary instrument that demonstrates both solo playing and ensemble repertoire.

What the civilian work involves
  • Perform before live audiences in concerts, recitals, educational presentations, and other social gatherings.
  • Interpret or modify music, applying knowledge of harmony, melody, rhythm, and voice production to individualize presentations and maintain audience interest.
  • Specialize in playing a specific family of instruments or a particular type of music.
Civilian tools and software (examples)
  • Apple GarageBand

Music Directors and Composers

For musicians who held section leader or arranger assignments, guiding other musicians and arranging band music provides a foundation for civilian ensemble direction and composition.

How to prepare: Build a portfolio with an original ensemble arrangement, its score, and a recording of you rehearsing it with musicians.

What the civilian work involves
  • Direct groups at rehearsals and live or recorded performances to achieve desired effects such as tonal and harmonic balance dynamics, rhythm, and tempo.
  • Study scores to learn the music in detail, and to develop interpretations.
  • Apply elements of music theory to create musical and tonal structures, including harmonies and melodies.
Civilian tools and software (examples)
  • Anvil Studio

Notes & Sources

Evidence for this guidance (3 documents)
  1. USMC COOL MOC feed: 55XX

    [1] data/authority/marine_corps-codes.json entry 55XX (OSD COOL feed, fetched 2026-07-25); NAVMC 1200.1L Summary section not located for this code

    Supports: Ceremonial and marching band performance, Musical arranging and section leadership, Preventive maintenance of musical equipment, Musicians and Singers (O*NET 27-2042.00), Music Directors and Composers (O*NET 27-2041.00)

  2. O*NET: Musicians and Singers

    [2] O*NET 30.3 occupational data

    Supports: Musicians and Singers (O*NET 27-2042.00)

  3. O*NET: Music Directors and Composers

    [3] O*NET 30.3 occupational data

    Supports: Music Directors and Composers (O*NET 27-2041.00)

Defense contractor jobs for 55XX

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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