What does SI stand for?

Sergeant Instructor

This definition appears very rarely and is found in the following Acronym Finder categories:

Military and Government

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Samples in periodicals archive:

Then Spence McLeod emailed: 'I was Sergeant Instructor in the Royal Army Educational Corps at AAS Chepstow, attached to HQ Company, where the new intake did basic training during their first term.

MISSING ... and FOUND!

Unfortunately Johnson lost the best years of his career to the Second World War, when he served as an RAF sergeant instructor.

Double FA Cup hero dies; FOOTBALL

Stuart served his National Service in the Education Corps as a sergeant instructor and later spent 30 years as a civilian instructor at the Junior Leaders Regiment's unit at Gamecock Barracks, Bramcote.

ex-service notes

She had named it Squadron Quartermaster Sergeant Instructor Gorilla.

I DON'T RESPECT WIVES WHO CAN'T KEEP THEIR HUSBANDS; What sex row ...

Two sergeant instructors face lesser charges of hazing and dereliction of duty.

ACROSS THE NATION

Staff Sergeant Instructor Mandy Hart is the new Detachment Commander.

Pupils get a taste of Army life

AMONG the thousands of facts drummed into young skulls by unrelenting, unforgiving sergeant instructors at the Metropolitan Police's Hendon training school in 1947, I learned a little about royal protocol - but not enough as it transpired.

Caught off guard at the Royal Wedding; PETERBOROUGH

The triumphant sides were coached by former Welsh international army cadet, now Sergeant Instructor, Bobby Grey.

Cadets win international honours; Your Celebrations