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".
A non-commissioned officer (NCO) is a military officer who does not hold a commission. Non-commissioned officers usually earn their position of authority by promotion through the enlisted ranks. In contrast, commissioned officers usually enter directly from a military academy, officer training corps (OTC) or reserve officer training corps (ROTC), or officer candidate school (OCS) or officer training school (OTS), after receiving a post-secondary degree.
Sergeant major is a senior non-commissioned rank or appointment in many militaries around the world.
A chief petty officer (CPO) is a senior non-commissioned officer in many navies and coast guards, usually above petty officer.
A petty officer (PO) is a non-commissioned officer in many navies. In many nations, they are typically equal to a sergeant in comparison to other military branches. Often they may be superior to a seaman, and subordinate to more senior non-commissioned officers, such as a chief petty officers.
Chief Warrant officer is a senior warrant officer rank, used in many countries.
Master warrant officer (MWO) is a senior military rank in the Bangladesh Armed Forces, the Canadian Forces, Singapore Armed Forces, the South African National Defence Force and the Israel Defense Forces.
The Meritorious Service Medal (MSM) is a British medal awarded to Senior Non Commissioned Officers and Warrant Officers of the British armed forces for long and meritorious service. From 1916 to 1928, eligibility was extended to cover both valuable services by selected other ranks irrespective of length of service, and for gallantry not in the face of the enemy.
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 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.
Regimental Sergeant Major Marc Wicks, is a former Corps Regimental Sergeant Major of the Royal Marines who went on to serve as Senior Enlisted Advisor to NATO's Allied Command Transformation.
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.
The Army Sergeant Major is the most senior member of the other ranks of the British Army.
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.
Vice Admiral Andrew Paul Burns, is a senior Royal Navy officer. He has served as Fleet Commander since September 2021.
Vice Admiral Martin John Connell, is a senior Royal Navy officer currently serving as Second Sea Lord.
