(Capt) First Lieutenant (1stLt) Second Lieutenant (2ndLt) O-10 O-9 O-8 O-7 O-6 O-5 O-4 O-3 O-2 O-1 Warrant Officers See also: Warrant Officer (United States) Warrant Officers provide leadership and training in specialized fields and skills. Unlike most other militaries, the United States military confers warrants and commissions on its Warrant Officers,