US Air Force Officer Rank Insignia ~ Air Force

US Air Force rank is divided between enlisted airmen, non-commissioned officers, and commissioned officers, and ranges from the enlisted Airman Basic (E-1) to the commissioned rank of General (O-10). Enlisted promotions are granted based on a combination of test scores, years of experience, and selection board approval while officer promotions are based on time-in-grade and a promotion board. Promotions among enlisted personnel and non-commissioned officers are generally designated by increasing numbers of insignia chevrons. Commissioned officer rank is designated by bars, oak leaves, a silver eagle, and anywhere from one to four stars (one to five stars in war-time).

US Air Force Rank: Commissioned officers

The commissioned officer ranks of the USAF are divided into three sections: company grade, field grade, and general officers. Company grade officers are those officers in pay grades O-1 to O-3, while field grade officers are those in pay grades O-4 to O-6, and general officers are those in pay grades of O-7 and above.

Currently, promotion from Second Lieutenant to First Lieutenant is virtually guaranteed after two years of satisfactory service. The promotion from First Lieutenant to Captain is competitive after successfully completing another two years of service. Promotion to Major and above is through a board process. An officer's record is reviewed by a selection board at the Air Force Personnel Center at Randolph Air Force Base in San Antonio, Texas. This process occurs approximately between the seven- and ten-year mark, where a certain percentage of Captains will be selected for Major. This process will repeat at the 11-14 year mark for promotion to Lieutenant Colonel, and then around the eighteen-year mark for promotion to Colonel.

Pay grade	O-1	O-2	O-3	O-4	O-5	O-6
Insignia
Title	Second Lieutenant	First Lieutenant	Captain	Major	Lieutenant Colonel	Colonel
Abbreviation²	2d Lt	1st Lt	Capt	Maj	Lt Col	Col

Pay grade	O-7	O-8	O-9	O-10	Special
Insignia
Title	Brigadier General	Major General	Lieutenant General	General	General of the Air Force
Abbreviation²	Brig Gen	Maj Gen	Lt Gen	Gen	GAF

US Air Force: Warrant officers

Although provision is made in regulations for them, the USAF does not use warrant officer grades (the only armed service to not do so). The USAF inherited warrant officer ranks from the Army at its inception in 1947, but their place in the Air Force structure was never made clear. When Congress authorized the creation of two new senior enlisted ranks in 1958, Air Force officials privately concluded that these two new "super grades" could fill all Air Force needs then performed at the warrant officer level, although this was not publicly acknowledged until years later. The Air Force stopped appointing warrant officers in 1959, the same year the first promotions were made to the new top enlisted grade, Chief Master Sergeant. Most of the existing Air Force warrant officers entered the commissioned officer ranks during the 1960s, but tiny numbers continued to exist for the next 21 years.

The last active duty Air Force warrant officer, CWO4 James H. Long, retired in 1980 and the last Air Force Reserve warrant officer, CWO4 Bob Barrow, retired in 1992. Upon his retirement, he was honorarily promoted to CWO5, the only person in the Air Force ever to hold this grade. Barrow died in April 2008. Since Barrow's retirement, the Air Force warrant officer ranks, while still authorized by law, are not used.

US Air Force Rank: Enlisted airmen

Enlisted members of the USAF have pay grades from E-1 (entry level) to E-9 (senior enlisted). While all USAF military personnel are referred to as Airmen, the term also refers to the pay grades of E-1 through E-4, which are below the level of non-commissioned officers (NCOs). Above the pay grade of E-4 (i.e., pay grades E-5 through E-9) all ranks fall into the category of NCO and are further subdivided into NCOs (pay grades E-5 and E-6) and Senior NCOs (pay grades E-7 through E-9); the term Junior NCO is sometimes used to refer to staff sergeants and technical sergeants (pay grades E-5 and E-6).

The USAF is the only of the five branches of the United States military where NCO status is not achieved until an airman reaches the pay grade of E-5. In all other branches, NCO status is generally achieved at the pay grade of E-4 (e.g., a Corporal in the Army and Marine Corps, Petty Officer Third Class in the Navy and Coast Guard). However, E-4s in the Army with the rank of Specialist are not considered NCOs. The Air Force mirrored the Army from 1976 to 1991 with an E-4 being either a Senior Airman wearing three stripes without a star or a Sergeant (referred to as "Buck Sergeant"), which was noted by the presence of the central star and considered an NCO. Despite not being an NCO, a Senior Airman who has completed Airman Leadership School can be a supervisor.