Alter server
religious leader Judaism a man employed to lead services in the synagogue Christianity singing lead of a church choir
Communion
The central part of a church is called the nave. It is usually the main part of the church where the congregation sits during services.
This question doesn't have a clear answer without knowing what services of the church you are referring to. Titles are given based on the services performed and the domination of the church. All workers are called servants of the Lord. Some are paid a salary and others are volunteers.
A lectern is a stand in a church where the Bible or other religious texts are read or displayed during services.
Well, I have been to one (1) Methodist church for a church service, and Methodist church services are held similar to the way that Lutheran church services are held.
It is used to carry out church business such as mass, stations of the cross and all other services normally associated with and carried out in a church, however a church is normally called chapel.
Being a minister.
The curia is made up of all those who assist the pope in governing the Universal Church. The same term can be applied to those who assist a local bishop in the governance of the diocesan Church.
A person who helps the vicar is typically referred to as a church assistant or a vicar's assistant. They may assist with various tasks within the church, such as setting up for services, organizing events, or providing administrative support to the vicar.
A child priest is often referred to as an "altar server" or an "acolyte." These young individuals assist in the rituals and ceremonies of the church.
The clergy of the Roman Catholic Church are called Priests. The priest who heads a parish is also called a Pastor. The catholic church has extraordinary ministers such as the Extraordinary Minister of the Eucharist. These are lay people who assist with giving communion.