Although the position has become mostly ceremonial , during the 2014 shootings at Parliament Hill , Ottawa , the then Sergeant-at-Arms of the House of Commons , Kevin M. Vickers , assisted RCMP officers in engaging the gunman . Reports show that Sergeant-at-Arms Kevin Vickers alongside RCMP Constable Curtis Barrett shot and killed the gunman who had gained access to the Centre Block of the Canadian Parliament buildings . René Jalbert , Sergeant-at-Arms of the National Assembly of Quebec , is also known for his role in ending Denis Lortie 's killing spree in the Parliament Building on 8 May 1984 by constituting himself hostage and negotiating with the shooter for four hours
2014 shootings at Parliament Hill , Ottawa
2014 shootings at Parliament Hill, Ottawa
Serjeant-at-arms