The Tyler guards the outside of the door to the entrance to the Lodge. It is usually undertaken by an experienced member of the Lodge and is an elected office. He has responsibility for preparing the candidates prior to their entering the Lodge.
The Treasurer is responsible for Lodge finances. He produces annual accounts which are audited before being approved by the Lodge. Subscriptions are decided in Lodge on the Treasurers recommendation.
The Organist's role is to provide the music for the meetings and ceremonies. Most Lodges do not have a member with the necessary skills to play the organ and so rely on professional Masonic organists.
The Deacons accompany the candidate during the ceremonies of the Three Degrees in the Lodge. The collar jewel for both Deacons is identical. They carry a wand as a badge of their office.