Brigadier a brigadier is either the highest field rank or most junior general appointment, nominally commanding a brigade. It ranks above colonel and below major general. The rank is used by the British Army, the Royal Marines, the Australian Army, the Indian Army, the Sri Lankan Army, the New Zealand Army, the Pakistan Army and several others. Although it is not always considered a general officer rank, it is always considered equivalent to the brigadier general and brigade general rank of other countries. In NATO forces, brigadier is OF-6 on the rank scale. "The grade of brigadier-general, also called, almost interchangeably,
Field officer Field officer A field officer, field-grade officer, or senior officer is an army, Marine, or air force commissioned officer senior in rank to a company officer but junior to a general officer. In most armies this corresponds to the ranks of major, lieutenant colonel and colonel, or their equivalents. Some countries also include brigadier in the definition. Historically, a regiment or battalion's field officers made up its command element. In the Canadian Armed Forces, the equivalent of field officers are senior officers (); they include the army and air force ranks of Major, Lieutenant-Colonel, and Colonel, and the naval ranks