 Unlike other nations' militaries (which rank warrant officers as Staff NCO equivalents), the United States military confers warrants and commissions on its warrant officers and classifies them into a separate category senior to all enlisted grades of rank (including officer candidates), cadets, and midshipmen.As warrant officers are officer-level technical specialists they generally do not exercise command outside of their specialty.Warrant officers come primarily from the staff non-commissioned officer (SNCO) ranks.