Membership is by nomination and election, and is limited to 100 people at any given time.
Membership in the American Theological Society is by nomination and election by two-thirds of the members voting at the annual meeting.
Members-designate are those who have been elected to membership but who have not yet attended an annual meeting.
The American Theological Society's business is organized by an executive committee consisting of a president, a vice-president (who is also president-elect), the immediately past president, a secretary, a treasurer, a program officer, and membership officer, and two at-large members.
All are elected by the society's membership at its annual meeting.