MATSG-23's mission is to serve as the functional training advocate for all USMC Aviation Logistics entry-level training, to include initial accession (A), primary MOS (C), Aircraft Maintenance Officer, Aviation Ordnance Officer Career Progression Schools and Air Traffic Control Officer Course. Additionally, as directed by Training Command, MATSG-23 provides administrative and logistical support to regionally located units in order to prepare Marines for service in the Fleet Marine Force.  In addition to a headquarters element, MATSG-23 consists of two collocated subordinate units and two geographically separated subordinate units.  Aviation Maintenance Squadron 1 and Aviation Maintenance Squadron 2 are located along with the Group headquarters at NAS Pensacola, while Marine Detachment Keesler Air Force Base is in Biloxi Mississippi and Marine Aviation Training Support Squadron 1 is located aboard NAS Meridian, Mississippi.