- Cantate Chicago — Benjamin Rivera, Artistic Director. Active from 1997 to 2018, Cantate was a mixed chamber choir comprised of both professional and avocational singers whose goal was to explore and present mainly a cappella music from all time periods, cultures and lands.
- Chicago Symphony Chorus — Duain Wolfe, Chicago Symphony Chorus Director and Conductor; Benjamin Rivera, Jennifer Budziak, Andrew Lewis, Assistant Conductors.
- Church of the Ascension — Benjamin Rivera, Choirmaster. The Church of the Ascension is a diverse and welcoming Episcopal Church located in Chicago’s vibrant Gold Coast neighborhood. The all-professional Ascension Choir sings at the Solemn High Mass on Sundays from Michaelmas (September 29) to Corpus Christi (May or June) and for Holy Day masses throughout the year.
- Florentine Opera Company — Benjamin Rivera, Chorus Master. The Florentine Opera is Milwaukee’s oldest performing arts organization, beginning life as the Italian Opera Chorus in 1933. Their mission is to produce the full range of operatic works reflecting the highest musical and theatrical standards, and to support community and education programs that foster the current and next generation of opera audiences and practitioners.