sergeant at arms

an executive officer of a legislative or other body, whose duty it is to enforce its commands, preserve order, etc.

Origin of sergeant at arms

Middle English word dating back to 1350–1400

MacKay also had been a bagpiper and the sergeant-at-arms of the Inland Empire Emerald Society.

Det. Jeremiah MacKay: Proud New Father Killed in Christopher Dorner Shootout |Michael Daly |February 14, 2013 |DAILY BEAST
The Office of the Sergeant-at-Arms said Thursday that both would still operate, although perhaps in limited numbers.

The Capitol Hill Shutdown Slumber Party |Daniel Stone, Eve Conant |April 7, 2011 |DAILY BEAST
Thinking of these things, I was standing by Sergeant-at-Arms' chair; heard a scuffling noise behind; looked round, and lo!

Punch, Or The London Charivari, Vol. 99., December 6, 1890 |Various
When all were seated the sergeant-at-arms made proclamation, and called upon Warren Hastings, Esquire, to appear in court.

The History of England in Three Volumes, Vol.III. |E. Farr and E. H. Nolan

Sergeant-at-Arms bowing thrice advances, lifts Mace on to table, and retires.

Punch, or the London Charivari, Vol. 98, May 3, 1890. |Various
Ere many minutes the Sergeant-at-Arms approached and requested him to withdraw.

The Story of the Upper Canada Rebellion, Volume 1 |John Charles Dent
When the court was fully organized, they commanded the sergeant-at-arms to bring in the prisoner.

Charles I |Jacob Abbott

sergeant at arms

an officer of a legislative or fraternal body responsible for maintaining internal order

(formerly) an officer who served a monarch or noble, esp as an armed attendant

Also: sergeant, serjeant at arms, serjeant