A church pianist is usually expected to accompany the church's choir during rehearsals and performances. Most churches have one of each a week.
Church pianists are responsible for any piano playing that takes place during Sunday worship. They may also be expected to double on organ.
Some churches have a contemporary music worship music group that shares worship service performance opportunities with the choir. The church's pianist may be expected to a part of this group.
A church pianist often also serves as accompanist for rehearsals and performances of children's choirs.
Church pianists are often expected to participate in church governing matters and staff meetings in addition to responsibilities that are strictly musical.