Ordained Celebrant – the priest or bishop who celebrates the mass
Lectors or Readers – entrusted with reading the first reading during daily mass and the first and second readings at Sunday masses and other major feasts
Altar Servers – assist the priest in the celebration of the mass.
Extraordinary Ministers of Holy Communion – non-ordained people who help with the distribution of communion
Music Ministers and Cantors – provide music during the mass and other liturgical celebrations and lead the congregation in singing
Arts and Environment – people who ensure the liturgical environment is reverent, attractive and liturgically appropriate
Greeters and ushers – welcome people and help them find a seat
“….the liturgy is the summit toward which the activity of the Church is directed; it is also the fount from which all her power flows” (Second Vatican Council, Constitution on the Sacred Liturgy [Sacrosanctum Concilium], no. 10, in Vatican Council II: Volume 1: The Conciliar and Post Conciliar Documents, ed. Austin Flannery [Northport, NY: Costello Publishing, 1996]).