Mark Mummert (Dean)  is Cantor at Trinity Lutheran Church in Worcester and Artistic Director of the professional chamber choir Diamonds From The Dust. Prior to moving to Worcester in 2016, he was the Distinguished Visiting Cantor at the Lutheran Theological Seminary at Gettysburg (2015) and Director of Worship at Christ the King Lutheran Church in Houston, Texas. Mark has served on the board of the Association of Lutheran Church Musicians and the advisory council of the Institute of Liturgical Studies at Valparaiso University. Mark has been an active member of the York (PA), Philadelphia, and Houston chapters of the AGO, having served as the deputy for workshops for the recent national convention in Houston. Mark is also a composer of Christian ritual music, with his many works included in Evangelical Lutheran Worship (2006) and worship publications of Augsburg Fortress Publishers. Mark also sings with CONCORA (Connecticut Choral Artists) and with the Schola Cantorum of St. John the Evangelist Roman Catholic Church in Worcester.

Lois Toeppner (Sub-Dean)  brings a wealth of knowledge and experience, having served as Region I Councillor from 2000-2006 and AGO national secretary from 2008-2014, in addition to chairing the 1981 Region V (Milwaukee) and 1999 Region I (Worcester) conventions. She was and remains an advocate for moving the AGO into a new age of technology, and was a driving force behind the organization’s updated website with online dues collection and the establishment of a marketing committee. As a dual member with the Boston chapter, she served on the committee which established the Organ Library at Boston University, and from 2007-2008 served on the national PN & PR committee which hosted many concerts nationwide in the Year of the Organ. Lois was Minister of Music at St. John’s Lutheran Church in Sudbury for 29 years, and is currently in demand as a substitute organist throughout Central Massachusetts. She holds a Master of Music degree in Organ Performance from The Boston Conservatory (2006), and is a rostered Deacon in the Evangelical Lutheran Church in America.

David Moulton (Secretary) has served for nearly twenty years as Organist, Pianist, Cantor, Choir Director, and Director of Music in religious communities throughout Central Massachusetts. Though mostly self-taught at the organ and piano, his education and training have included private study with vocal instructors in Massachusetts and New York, as well as coursework at Ithaca College School of Music, and Framingham State University, where he was later appointed as Visiting Lecturer to direct the university’s choral program in 2001 and 2002. David has been an active voting member of the Worcester Chapter of the American Guild of Organists since 2005; he served two consecutive terms as Secretary from 2008 to 2012, and during this time, he also fulfilled the Chapter’s need for a Newsletter Editor. Today, in addition to his full-time work as a piano tuner and technician, David holds concurrent appointments as Minister of Music (Organist & Choir Director) at the First Baptist Church of Gardner, and as Assistant Cathedral Organist at the Cathedral of Saint Paul in Worcester.

Juan Mesa (Treasurer) began his early musical training in his native city of Puerto Montt in Chile, and completed a diploma in piano performance from Universidad Austral’s Conservatory as a student of the renowned Ximena Cabello. He emigrated to the US in 2001, obtaining a Bachelor of Music degree in organ performance and composition from Western Connecticut State University and Master of Music degree in organ performance and early music at Indiana University. Juan has performed solo recitals across the US, Canada, Chile, and Argentina, and has collaborated with the Indiana-based Exordium Baroque Ensemble, the Crescendo Period Orchestra in western Connecticut, the Choirs of Trinity Episcopal Church in Indianapolis, MYRIAM ensemble of Boston, and the University of Notre Dame’s Children’s Choir, among others. Juan was a first-place winner of the New England RCYO competition in 2003, and was most recently a semi-finalist in the 2018 American Guild of Organists National Competition in Organ Improvisation. He is currently a Ph.D. candidate in the Music Theory department at Indiana University, and for 6 years he led the multi-generational music program at St. Mary’s church in Holliston, MA. He is currently Director of Music at Roslindale Congregational Church in Boston, organist for The College Church SDA in Lancaster, MA, and Director of Music and Organist at St Leonard’s Church in Boston’s North End.

Leonardo Ciampa (Member-at-Large/Registrar)  is the founding director of Arts MetroWest (since 2012) and Honorary Music Director (Maestro di Cappella Onorario) of the Basilica di Sant’Ubaldo in Gubbio, Italy (since 2015). Till recently he was artistic director of organ concerts at MIT (2009-2016). As an organ recitalist, Ciampa has made a dozen European tours encompassing Italy, Austria, Germany, and Switzerland. He is particularly admired in Italy, where he has played in numerous international festivals (Festival Perosiano, Festival Biellese, Organi Storici della Valsesia, Le Voci della Città, Festival Organistico Lauretano, Reate Festival, etc.). Ciampa’s compositions include Suite Siciliana, Op. 145 (for two violins, piano and orchestra), commissioned by the Pro Arte Chamber Orchestra of Boston to open their 25th anniversary season at Harvard’s Sanders Theatre; The Annunciation, Op. 203 (cantata for chorus, soloists, and strings); the Kresge Organ Symphony, commissioned by MIT and premiered in Kresge Auditorium; a piano quintet (premiered by the Lavazza Chamber Ensemble); and Missa Pamphyliana, premiered at the Basilica di Sant’Ubaldo in Gubbio by the Cantores Beati Ubaldi (Renzo Menichetti, conductor). 

Robert Potterton III (Member-at-Large/Webmaster) has been a professional church musician for nearly twenty years, most recently as Organist & Choirmaster at historic Christ Church (Episcopal) in Fitchburg since 2015. A Connecticut native, he was brought up in the Lutheran Church-Missouri Synod, holding positions at several parishes there and in New York through high school and college. He completed a Bachelor of Music degree in Composition & Organ Performance at Houghton College (NY), where he studied with Judy Congdon, and Master of Sacred Music & Master of Sacred Theology degrees at Boston University, where he studied with Peter Sykes. From 2008-2015, he was Director of Worship & the Arts at St. Luke’s Lutheran Church in Dedham, during which time he also served as one of the youngest chapter deans in the history of the AGO. Robert resides in Spencer with his wife Carissa, a computer programmer and professional photographer, and their children: Adam and Kimberly.

Kiel Krommer (Member-at-Large/Scholarship Coordinator) became music director at First Church of Monson, MA in September of 2018. He graduated in 2010 with a Bachelor of Fine Arts degree from Anna Maria College in Paxton, MA. He previously was church organist and music director for three churches throughout Southern Worcester County. Kiel started studying piano at seven and organ at thirteen. While at Anna Maria, he studied organ with Ian Watson. After college, he was an organ student of William Ness. In 2019, he assumed responsibility for overseeing the Will Sherwood Scholarship program.

Elizabeth “Bess” Sproul (Member-at-Large) received a Bachelor’s degree in choral music education from the University of Michigan, where she studied organ with Henry Tysinger.  She received a Masters in Music Ed from the Ohio State University, where she took courses in church music from Wilbur Held. She taught music in public schools in several states, and conducted a community chorus in York, Maine. She served as Director of Music Ministries at St. Michael’s Lutheran Church in Camillus, NY, and studied organ for several years with Will Headlee, retired head of the organ department at Syracuse University.  From 2011- 2018 she served as Director of Music at Good Shepherd Lutheran Church, Westborough, MA. Recently retired, she enjoys being with her grandchildren, and traveling with her husband, a retired Lutheran pastor.

Catherine Merrill (Member-at-Large) has been an organist at St. Joseph Catholic Church in Charlton, MA, since 2013. She also accompanies services at the Overlook Retirement Community in Charlton. She took private piano lessons for 12 years beginning at age 5, and added organ study during her final two year of high school. She was an organist for St. Francis of Assisi Catholic Church in Norristown, PA, while finishing high school and then while receiving a Bachelor’s degree in electric engineering from Villanova University. She also was a pianist for St. Theresa the Little Flower Catholic Church in Summerville, SC, while teaching electrical engineering technology at Trident Technical College in Charleston, SC. Cathy and her husband Scott have made Charlton their home since Scott left active duty as a U.S. naval officer, and have raised four children there. She considers it a joy to be playing the organ again after so many years away from it.


Richard Jones (Chaplain) is an East Brookfield native who has served as Minister at the First Parish in Bolton, MA, since 1995. He attended Webster University, Gordon College, and graduated (cum laude) from Worcester State University, studying religion, Biblical/theological studies, and English. He received his M.Div. (cum laude) from Andover Newton Theological Seminary. In addition to serving as the Chaplain for Worcester AGO, he has served in a similar capacity for the Bolton Police Department, as a board member for the Worcester Area Mission Society and the Bolton Historical Society, and as president of the Shakespeare Club of Worcester. He is an active supporter of the organ and organists in Worcester County and beyond.

Will Sherwood (Liaison to Mechanics Hall & Holy Cross Organ Library) has been an active member of Worcester AGO for over forty years, serving most recently as Dean from 2010-2018. He is a frequent recitalist and active composer, arranger, and accompanist. Since 1984 has served as Minister of Music at the First Unitarian Church in Worcester. Will also holds the Associate and Choirmaster certifications from the Guild. Upon his retirement from chapter leadership, the Scholarship Program was named in his honor.

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