Warrant Officers possess military occupational specialties (MOS) in many basic branches. These branch schools (MOS proponents).

Within a branch there are multiple specialties. For example, there are two specialties within the Adjutant General Branch, Personnel Officer and Bandmaster.

Adjutant General Fort Jackson, South Carolina	Air Defense Artillery Fort Bliss, Texas	Aviation Fort Rucker, Alabama	Engineer Fort Leonard Wood, Missouri	Field Artillery Fort Sill, Oklahoma
Judge Advocate General Charlottesville, Virginia	Medical Service Fort Sam Houston, Texas	Military Intelligence Fort Huachuca, Arizona	Military Police Fort Leonard Wood, Missouri	Ordnance Aberdeen Proving Grounds, Maryland and Redstone Arsenal, Alabama
Quartermaster Fort Lee, Virginia	Signal Fort Gordon, Georgia	Special Forces Fort Bragg, North Carolina	Transportation Fort Eustis, Virginia	Veterinary Fort Sam Houston, Texas