Xiaoqi Lu is the current Sergeant-at-Arms.

The position of Sergeant At Arms is a key position within Beta Sigma, as it guards sub-rosa and protects the Brothers. The obligations of the Sergeant At Arms are to collect votes; to assist the Parliamentarian in counting the votes and if any Brother is to exit the meeting at any time the Sergeant At Arms informs them of their voting status when they return. This position may not plan any events or seem very essential but it is still a vital piece to the inner workings of the Beta Sigma chapter of Phi Sigma Pi.