Quartermaster sergeant instructor

Quartermaster sergeant instructor (QMSI) is a warrant officer appointment in the armies of the United Kingdom and Canada.

British Army

Quartermaster sergeant instructor is an appointment held by warrant officers class 2 in the British Army's Small Arms School Corps and by some in the Royal Engineers and Royal Army Physical Training Corps.^[1]

Canada

In the Canadian Army, QMSI is an appointment held by the senior master warrant officer,^[2] within each battalion of the Princess Patricia's Canadian Light Infantry.