Faculty
Tony Thornton, Artistic Director | Conducting
Tony Thornton is an award-winning educator, conductor, and author whose work has distinguished him as a dynamic force in the choral field across the United States and internationally. He has collaborated with more than 400 mixed, treble, and tenor/bass choruses in public and private schools, universities, churches, community ensembles, and professional organizations throughout North America, as well as in Japan and across Europe. Dr. Thornton currently serves as Artistic Director of the Sarteano Choral Workshop in Italy and the Choral Planet Festival Singers program in Europe, as well as Chorus Director of the Jacksonville Symphony Chorus, where he holds the Tom Zimmerman Endowed Chair.
He has led choruses on fifteen international tours, performing in many of the world’s most renowned venues, including St. Mark’s Basilica in Venice, the Salzburg Dom, Salle Wilfrid-Pelletier in Montréal, Lobkowicz Palace in Prague, St. Peter’s Basilica in Rome, the Concertgebouw in Amsterdam, Carl Orff Saal in Munich, and St. Stephen’s Cathedral in Vienna. His choruses have also appeared in leading U.S. venues, including Carnegie Hall, Benaroya Hall in Seattle, and Symphony Hall in Boston.
Dr. Thornton prepared choruses for Beethoven’s Symphony No. 9 with the New York Philharmonic under the direction of Jaap van Zweden, and major choral-orchestral masterworks for collaborations with other distinguished conductors such as Robert Shaw, Simon Carrington, Kevin Rhodes, and Andrew Megill. In a New York Times review of Bach’s Mass in B minor, critic James R. Oestreich praised the chorus prepared by Thornton as “unquestionably the star” of the two performances.
A seasoned performer, Thornton began his career as a tenor soloist, appearing throughout the United States, Europe, and Asia. He was a member of the Westminster Choir and the Westminster Symphonic Choir, performing at major international festivals, including the Spoleto Festival in both Italy and the United States. Thornton has appeared on recordings conducted by Leonard Bernstein, Riccardo Muti, Robert Shaw, Claudio Abbado, and Zubin Mehta. He performed as a member of the Grammy Award-winning Robert Shaw Festival Singers for six years.
In addition to his conducting and performance career, Thornton is a respected author and thought leader in the choral field. He is the author of The Choral Singer’s Survival Guide and the forthcoming Choral Singing for Life, and he established a choral series bearing his name with Colla Voce Music. His academic career includes appointments as Professor and Director of Choral Studies at the University of Massachusetts Amherst and Professor and Director of Choral and Vocal Studies and the Doug and Nickie Burns Endowed Chair in Choral Music at Oklahoma State University. He is the Founding Artistic Director of the American Prize-winning Illumine Vocal Arts Ensemble.
Dr. Thornton holds degrees from Westminster Choir College, Louisiana State University, and the University of Arizona, and is an active member of the American Choral Directors Association (ACDA), Chorus America, and the National Association of Teachers of Singing. He is Past President of the Massachusetts chapter of ACDA and served as Collegiate Repertoire and Resources Chair for ACDA Eastern.
Jamie-Rose Guarrine | Voice
Soprano Jamie-Rose Guarrine is acclaimed on opera and concert stages throughout the United States for her “utterly thrilling, agile voice” and for bringing “pathos, beauty, and heartbreaking skill” to her performances. She proudly serves as Professor of Voice at the University of Massachusetts Amherst, where her work as a passionate teacher and mentor complements an active performing career.
Dr. Guarrine has spent five summers on the faculty of the Sarteano Choral Workshop in Sarteano, Italy, where she teaches private voice lessons and works with the ensemble to foster healthy, sustainable vocal technique in service of expressive choral singing. She also curates the Portico Concerts, a recital series featuring ensemble singers as soloists. In summer 2026, she joined the faculty of the Festival Singers program in Verona, Italy, as Voice Specialist, continuing her work at the intersection of studio voice teaching and ensemble singing. Guarrine has also presented masterclasses to aspiring singers throughout the United States and at conferences on bringing studio vocal pedagogy into the choral space.
Guarrine has performed with leading opera companies and orchestras throughout the United States and internationally, including Los Angeles Opera, Minnesota Opera, The Santa Fe Opera, Opera Philadelphia, Utah Opera, the Saint Paul Chamber Orchestra, The National Symphony Orchestra of Costa Rica, among many others. Her repertoire spans the masterworks of Bach, Handel, and Mozart as well as modern works, with operatic highlights including her signature role of Susanna in Le nozze di Figaro and Richard Strauss’s Arabella, in which Opera News praised her for traversing the Fiakermilli’s coloratura flights “with ease and clarity.” Recently, she made her Jordan Hall debut with the Boston Modern Orchestra Project and Odyssey Opera. She created the role of “Fury” in White Snake Project’s Rev. 23 for performances in Boston at John Hancock Hall, New York at Trinity Wall Street, and National Sawdust in Brooklyn.
Guarrine’s debut album, TRANSPARENT BOUNDARIES, featuring newly commissioned works by Lori Laitman and Scott Gendel, debuted in 2020 on PARMA/Navona Records and was featured in numerous publications, including Gramophone Magazine. Her most recent album, FILLED WITH THE LIGHT: Songs from New England, was released on Navona Records in June 2026. Joined by pianist Martha Fischer and cellist Karl Knapp, Guarrine explores works inspired by the poetry, landscape, and musical heritage of New England, including the first commercial recording of Alice Parker’s Three Mountain Hymns for solo voice.
A native of Peoria, Illinois, Guarrine holds a bachelor’s degree in Music Education from Illinois Wesleyan University and received her M.M. and D.M.A. from the University of Wisconsin–Madison as a Distinguished Collins Fellow.