Saint Ambrose  is a vibrant Catholic community. We gather at the table of the Lord to worship our God with joyous hearts and a welcoming spirit. Mass times are: Mondays at 8:00 AM, Tuesdays at 2:30 PM (School Mass), 5:30 PM, Wednesdays at 8:00 AM, Thursdays at 5:30 PM, Fridays at 8:00 AM, Saturdays at 4:00 PM, and Sundays at 8:30 AM, 11:00 AM, and 5:00 PM. Weekday Masses are celebrated in St. Francis Chapel, while weekend Masses are celebrated in our main church.

The parish offers opportunities for Eucharistic Adoration two days a week. Exposition of the Blessed Sacrament takes place following the 8:00 AM Mass on Wednesday mornings in Saint Francis Chapel with benediction at 7:30 PM Wednesday evenings. On Sundays, exposition takes place at 1:00 PM with benediction at 4:45 PM just prior to the Sunday evening Mass.

Saint Ambrose invites lay participation in liturgical ministries such as altar servers, ushers, proclaimers, cantors, choir members, and extraordinary ministers of the Eucharist (EEM).