The Sergeant at Arms will keep track of the club’s physical property, such as the banner, lectern, timing device, and other meeting materials. They arrive early to prepare the meeting place for members and stay late to stow all of the club’s equipment. The Sergeant at Arms is also in charge of the onsite and online meeting places, obtaining a new space when necessary, and maintaining contact with the people who allow the club to use the space for meetings.
The Sergeant at Arms also has a role to play during business meetings, speech contests, and other special club events. For example, if a club is voting on admitting a new member to the club, the Sergeant at Arms assists either by escorting the potential new member outside of the onsite meeting space or directing them to a breakout room for an online meeting. For an onsite speech contest, the Sergeant at Arms stands at the door while contestants compete to ensure that the speakers are not interrupted by latecomers. For an online speech contest, the Sergeant at Arms moderates the online platform, ensuring all attendees are muted.
(Source: https://www.toastmasters.org/resources/club-leadership-handbook)