Officer (armed Forces) - Non-commissioned Officers

Non-commissioned Officers

A non-commissioned officer (NCO) is an enlisted member of the armed forces holding a position of some degree of authority who has (usually) obtained it by promotion from within the non-officer ranks. Non-commissioned officers usually receive some leadership training, but their function is to serve as supervisors within their area of trade speciality and, at lower NCO grades, they are not generally considered management specialists. Senior non-commissioned officers serve as advisors and leaders from the duty section level to the highest levels of the armed forces establishment. The duties of an NCO can vary greatly in scope, so that an NCO in one country may hold almost no authority, while others such as the United States and the United Kingdom consider their NCOs to be "the backbone of the military."

In most maritime forces (navies and coast guards), the NCO ranks are called Petty Officers and Chief Petty Officers, with enlisted ranks prior to attaining NCO/petty officer status typically being called Seaman, or some derivation thereof. In most traditional infantry, marine and air forces, the NCO ranks are known as Sergeants and Corporals, with non-NCO enlisted ranks referred to as Privates and Airmen.

However, some countries use the term commission to describe the promotion of enlisted soldiers. Especially in countries with mandatory service in the armed forces, NCOs are referred to as professional soldiers, not officers.