This United States Army manual, Army Techniques Publication ATP 4-33 Maintenance Operations Change 1 November 2019, describes operational Army maintenance operations and focuses on the conduct of maintenance operations at the operational and tactical-level. Its primary focus is on maintenance organizations and their missions, but also addresses the roles and functions of strategic level maintenance organizations that provide logistics and individual Soldier support services.

The principal audience for ATP 4-33 is all members of the profession of arms. Commanders and staffs of Army headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication.

ATP 4-33 applies to the Active Army, Army National Guard/Army National Guard of the United States and United States Army Reserve unless otherwise stated.