Warrant officer (WO) is a rank or category of ranks in the armed forces of many countries. Depending on the country, service, or historical context, warrant officers are sometimes classified as the most junior of the commissioned officer ranks, the most senior of the non-commissioned officer (NCO) ranks, or in a separate category of their own. Warrant officer ranks are especially prominent in the militaries of Commonwealth nations and the United States.
Regimental sergeant major (RSM) is an appointment that may be held by a warrant officer (WO) in the British Army, the Royal Marines, and the armies of many other Commonwealth and former Commonwealth nations. It is also an actual rank in the Irish Defence Forces, and formerly in the British Army, Royal Marines and United States Army. Only one warrant officer holds the appointment of RSM in any regiment or battalion, making them the senior warrant officer; in a unit with more than one top-ranked WO, the RSM is considered to be first amongst equals". The RSM is primarily responsible for assisting their commander in maintaining standards and discipline amongst the non-commissioned members and acts as a parental figure to their subordinates, sometimes referred to by the mantra "Drill, Dress and Discipline".
Sergeant is a rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, serjeant, is used in The Rifles and other units that draw their heritage from the British light infantry. Its origin is the Latin serviens, 'one who serves', through the French term sergeant.
Sergeant major is a senior non-commissioned rank or appointment in many militaries around the world.
Chief warrant officer is a senior warrant officer rank, used in many countries.
"Other ranks" is the term used to refer to all ranks below officers in the British Army and the Royal Marines. It includes warrant officers, non-commissioned officers ("NCOs") and ordinary soldiers with the rank of private or regimental equivalent. Officers may, in speaking, distinguish themselves from those "in the ranks".
Like the British Army, the Australian Army does not use the term 'enlisted' to describe its non-commissioned ranks. Instead, personnel who are not commissioned officers are referred to as other ranks. These are soldiers, non-commissioned officers (NCOs) and warrant officers (WOs). Warrant officers are appointed by a warrant which is signed by the Chief of the Army. The insignia for non-commissioned ranks are identical to the British Army up to the rank of warrant officer class two. Since 1976, WO1s and the WO in the Australian Army wear insignia using the Australian Coat of Arms.
A bandmaster is the leader and conductor of a band, usually a concert band, military band, brass band or a marching band.
The Australian Defence Force's (ADF) ranks of officers and enlisted personnel in each of its three service branches of the Royal Australian Navy (RAN), the Australian Army, and the Royal Australian Air Force (RAAF) inherited their rank structures from their British counterparts. The insignia used to identify these ranks are also generally similar to those used in the British Armed Forces.
A Senior Enlisted Advisor (SEA) in the United States Armed Forces is the most senior enlisted service member in a unit, and acts as an advisor to the commanding officer. Formally, E-9 billets for the senior enlisted advisor are established at Service unit, command, major command, force, or fleet levels to the SEAs/CSELs of DoD Agencies and the Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff. SEAs are also known as Command Senior Enlisted Leaders (CSEL). Always a non-commissioned officer, the SEA is the main link between the commanding officer and the enlisted service members under his or her charge.
A warrant officer (WO) in the British Armed Forces is a member of the highest-ranking group of non-commissioned ranks, holding the King's Warrant, which is signed by the Secretary of State for Defence.
The Warrant Officer of the Royal Air Force (WORAF) is the senior RAF appointment for a warrant officer (WO), and therefore the most senior non-commissioned appointment in the Royal Air Force (RAF). The person holding this military appointment advises the Chief of the Air Staff (CAS) on matters concerning airmen and airwomen of the RAF. The post was created in 1996 as the Chief of the Air Staff’s Warrant Officer. The post was re-titled Warrant Officer of the Royal Air Force (WORAF) on 1 July 2021.
Regimental Sergeant Major of the Army (RSM-A) is the most senior Warrant Officer in the Australian Army. It is a singular appointment – it is only held by one person at any time. RSM-A holds the unique rank of Warrant Officer (WO) which is senior to Warrant Officer Class One. The special insignia for the RSM-A is the Australian coat of arms with a wreath around it. The twelfth and current Regimental Sergeant Major of the Army is Kim Felmingham.
The Warrant Officer to the Royal Navy (WORN) is the most senior warrant officer and rating of the Royal Navy. The person holding this appointment's main responsibility is to act as a channel between the non commissioned ranks and Senior Naval officers, enabling communication between the Sailors and Marines and the Senior Navy leadership.
The Corps Regimental Sergeant Major is the most senior warrant officer of the Royal Marines. Responsible for maintaining standards and discipline within the Royal Marines, they act as a parental figure to their subordinates and also to junior officers, even though the latter technically outrank the RSM.
Major Glenn John Haughton, is a retired British Army officer. In November 2018, he served as the Senior Enlisted Advisor to the Chiefs of Staff Committee until December 2021. He was previously the Army Sergeant Major, the most senior warrant officer and member of the other ranks in the British Army, from 2015 to 2018. He has also served as Regimental Sergeant Major of the 1st Battalion, Grenadier Guards and Academy Sergeant Major at the Royal Military Academy Sandhurst.
The Senior Enlisted Advisor to the Chiefs of Staff Committee (SEAC) is the most senior member of the other ranks of the British Armed Forces. The role of the SEAC is to advise the Chiefs of Staff Committee, contribute to policy and decision making, and "bring the perspective of the Warrant Officers, Non-Commissioned Officers and Junior Ranks". The first SEAC took up the appointment on 1 November 2018.
Major Gavin Henderson Paton is a British Army officer. From 2018 to 2021, he served as the Army Sergeant Major, the most senior warrant officer and member of the other ranks in the British Army.
Lieutenant Commander Carl P. "Speedy" Steedman is a Royal Navy officer, who served as Warrant Officer to the Royal Navy, the most senior non-commissioned advisor and senior rating of the Royal Navy from 31 January 2020 to July 2022.
British Army 
