Worshipful Master:
The office of Worshipful Master is the highest honor to which a lodge may appoint any of its members. The office is filled by election, generally by means of a secret ballot. However, in most lodges the progression is such that the post will almost always be filled by the previous year's Senior Warden. It should be noted that the honorific "Worshipful" does not imply that the Master is worshiped. Rather, use of the word implies its original meaning, "to give respect", similar to calling a judge "Your Honor" or a mayor "Honorable".
Senior Warden:
The 'Senior Warden' is the second of the three principal officers of a lodge, and is the Master's principal deputy. In many lodges it is presumed that the Senior Warden will become the next Worshipful Master.
Junior Warden:
The third of the 'principal officers' is the 'Junior Warden'. The Junior Warden has a particular responsibility for ensuring that visiting Masons are in possession of the necessary credentials. The Junior Warden is charged with the supervision of the Lodge while it is in recess for meals or other social purposes. The Wardens are 'regular officers' of the Lodge, meaning that the positions must be filled.
Treasurer:
The role of the 'Treasurer' is to keep the accounts, collect annual dues from the members, pay bills, and forward annual dues to the Grand Lodge. The annual presentation of accounts is an important measure of the lodge's continuing viability, whilst the efficient collection of annual membership dues are vitally important, as any lapse in payment (deliberate or unintentional) can lead to a member losing voting rights, being denied the opportunity to visit other lodges, and finally even being debarred or excluded from his own lodge.
Secretary:
The Secretary's role includes issuing the formal notice of an impending meeting, with time, date and agenda, recording meeting minutes, completing statistical returns to the Grand Lodge, and advising the Worshipful Master on matters of procedure. In many lodges it is also the Secretary who determines (with consultation) the progression of officers within the lodge. The Secretary is almost always a key figure in the interviewing of potential new members of the lodge
Senior Deacon:
The principal roles of the Senior Deacon are to conduct candidates around the Lodge during certain ceremonies and formally to assist the Worshipful Master and to carry messages between the Master and the Senior Warden.
Junior Deacon:
The office of 'Junior Deacon' is similar in many respects to that of Senior Deacon. The principal roles of the Junior Deacon are to assist the Senior Warden, conduct certain candidates, and carry messages between the two Wardens. In some jurisdictions he is also responsible for guarding the inside of the main door of the lodge and ensuring that the lodge is tyled.
Steward:
When a degree ceremony is performed, one or more Steward(s) may be required to assist the two Deacons in conducting the candidates around the temple. Stewards are often tasked with an understudy role to fill the position of the Senior Deacon or Junior Deacons, in their absence.
Tyler:
His duty is to guard the door (from the outside), with a drawn sword, and ensure that only those who are duly qualified manage to gain entry into the lodge meeting. In some jurisdictions, he also prepares candidates for their admission. The Tyler is traditionally responsible for preparing the lodge room before the meeting, and for storing and maintaining the regalia after the meeting,