Like his senior counterpart, the Senior Deacon, the Jewel of his office is the Square and Compass, however the Junior Deacon's Square and Compass has a moon in the center, which signifies that he is in the West.
The Junior Deacon of a Masonic Lodge is an assistant officer of the Lodge. He sits to the lower right of the Senior Warden. The Junior Deacon's principle role is to prepare the candidates during ritual and escort them to the lodge room and assist the Senior Deacon.
The Junior Deacon's position is similar to a Manager. The Junior Deacon of a Masonic Lodge is an appointed officer of the Lodge.