Quartermaster sergeant instructor (QMSI) is a

warrant officer 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 ranks, the mos ...

appointment in the armies of the United Kingdom and Canada.

British Army

Quartermaster sergeant instructor is an appointment held by

s class 2 in the British Army's Small Arms School Corps and by some in the

Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is a corps of the British Army. It provides military engineering and other technical support to the British Armed Forces and is heade ...

and Royal Army Physical Training Corps.

Canada

In the

Canadian Army The Canadian Army (french: Armée canadienne) is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also respo ...

, QMSI is an appointment held by the senior master warrant officer within each

battalion A battalion is a military unit, typically consisting of 300 to 1,200 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies (usually each commanded by a major or a captain). In some countries, battalions are ...

of the

Princess Patricia's Canadian Light Infantry Princess Patricia's Canadian Light Infantry (PPCLI, generally referred to as the Patricia's) is one of the three Regular Force infantry regiments of the Canadian Army of the Canadian Armed Forces. Formed in 1914, it is named for Princess Patrici ...

. Military appointments of the British Army Military appointments of Canada Warrant officers {{mil-rank-stub