The Worshipful Master sits in the East of the Lodge room (symbolic of the Rising Sun in the East) and directs all of the business of the Lodge. Note: Even if the building faces a different direction, the Master is said to be "in the East". He also presides over ritual and ceremonies.
Worshipful Master & DDGM #3B
The Junior Warden of a Masonic Lodge is the third in command of the Lodge. The Junior Warden sits in the South (symbolic of the position of the sun at midday) and is responsible for the Brethren while the Lodge is at ease or refreshment.
The Treasurer of a Masonic Lodge is the Chief Financial Officer of the Lodge. He sits to the right of the Master and behind the Senior Deacon.
The Treasurer is responsible for all financial transactions. He receives all money, pays all debts by order of the Worshipful Master with the consent of the lodge and renders a report when requested.
The Junior Deacon's principle roles are to assist the Senior Warden by carrying messages from the Senior Warden in the West to the Junior Warden in the South and to guard the inner door of the Lodge.
The Junior Steward is tasked to understudy the Senior Steward position and fill in for the Senior Steward in his absence. The Junior Steward's principle role is to assist the Senior Steward and the Senior Deacon in the preparation of the Candidates.
The Tiler's duties and principle role is to ensure that only those who are duly qualified are allowed to enter the Lodge Room. He guards against cowans and eavesdroppers. During the Middle Ages, a cowan was a man who built stone walls of poor quality. He was an uninitiated or non-apprenticed stonemason...a "jackleg", if you will.
In the absence of the Worshipful Master, the Senior Warden assumes the Worshipful Master's duties. The Senior Warden of a Masonic Lodge sits in the West (symbolic of the setting sun) and assists the Worshipful Master in opening and closing the Lodge.
The Secretary's Lodge Officer Duties require a high degree of lodge experience, Masonic knowledge, diplomacy and, above all, detailed paperwork skills. The Lodge Secretary is the backbone of any Masonic Lodge and he holds a position of great responsibility. He sits to the left of the Master.
The Senior Deacon of a Masonic Lodge is an assistant officer of the Lodge. The Senior Deacon's principle roles are to welcome and escort both visitors and candidates into the lodge and introduce distinguished visitors.
The Senior Steward's principle role is to prepare the candidates during ritual and escort them to the lodge room and assist the Senior Deacon. In their entry Officer positions, both the Senior and Junior Stewards typically handle kitchen duties and wait staff for the members.
The Chaplain is the spiritual leader of the Lodge. While he may or may not be a real-world Minister, Priest, Rabbi or Imam,... in the lodge, the Chaplain is responsible for non-denominational prayers at both the opening and closing of meetings, during degree ritual ceremonies and before meals. Most Chaplains have no religious training and prayers are non-denominational.