Under Officer

Under Officer is a position/rank held by senior Officer Cadets at the British military academies and in the Officers Training Corps; it is also used by the Army Cadet Force and the Combined Cadet Force. There are actually two separate ranks: Junior Under Officer (JUO) and Senior Under Officer (SUO). They are usually addressed as "JUO" or "SUO" as appropriate, but are not saluted.

United Kingdom

At the Royal Military Academy Sandhurst and in the OTC, JUOs wear an Austrian Knot above a single bar on the shoulder and SUOs wear an Austrian Knot above two bars. CCF JUOs wear a white, green or blue flash on their shoulder straps.

New Zealand

Cadet Under Officer is also a rank in New Zealand's Air Training Corps and Cadet Corps. It ranks between Cadet Warrant Officer and Pilot Officer, thus making it the highest rank a cadet can reach. Cadet Under Officers normally age 17-21 and to be eligible for commission one must be at least 20 years of age. Hence Under Officers are generally treated as understudy officers. They often perform roles similar to Commissioned Officers, however they do not have nearly the same legal responsibilities. Cadet Under Officers wear insignia similar to that worn by Officer Cadets, except that the thin blue braid is replaced by a piece of NCO chevron cloth. This emphasises their official status as cadets rather than adult leaders.

Australia

In the Australian Army Cadets, the rank of Cadet Under Officer is the highest Cadet rank. They are saluted and addressed as "Sir" or "Ma'am" by their subordinates but not by adult officers or instructors.AAC CUOs may hold many appointments, including National Cadet Under Officer, Regional Cadet Under Officer, Battalion Cadet Under Officer, Quartermaster, Company Commander, and Platoon Commander. The rank badge is a lozenge, which contains 27 1/2 chevrons (a chevron is the equivalent of a LCPL stripe). The National Cadet Under Officer has red in the centre of the lozenge. Regional Cadet Under Officers have blue inthe centre of the lozenge.To become a CUO a cadet must have completed the Senior Leaders Course Module Two, otherwise known as the CUO/WO Course, often held either at a mid or end of year session. The course runs for one week on a military base, and during this course a prospective CUO will learn platoon and company level command. To gain entry to the course the Cadet must have successfully completed the Senior Leaders Module One Course or the SGT Course, which entitles them to bear the highest rank of Staff Sergeant.

In the Australian Air Force Cadets, the rank of Cadet Under Officer is the highest Cadet rank. They are saluted and addressed as "Sir" or "Ma'am" by their subordinates but not by adult officer or instructors or members of the Australian Defence Force. The insignia for an AAFC CUO is a white stripe. To achieve te rank of CUO, an AAFC Cadet Sergeant, Cadet Flight Sergeant or Cadet Warrant Officer must complete the CUO course, which typically takes 3-4 weeks at a RAAF base in their home state (Wing).