The Individual Ready Reserve (IRR) is a category of the Ready Reserve of the Reserve Component of the Armed Forces of the United States composed of former active duty or reserve military personnel, and is authorized under 10 U.S.Code Section 1005. The IRR is composed of enlisted personnel and officers, from all ranges of Military Occupational Specialties including combat arms, combat support, and combat service support.

Riflemen are the primary scouts, assault troops, and close combat forces available to the MAGTF. They are the foundation of the Marine infantry organization, and as such are the nucleus of the fire team in the rifle squad.

Expeditionary Airfield (EAF) Systems Technicians design expeditionary airfields, employs, installs, operates, inspects, maintains, and repairs EAF Systems to include Arresting Gear Systems, Visual Landing Aids, Airfield Lighting and Marking Systems and Airfield Surfacing System.