Rachelle Jonck received her musical training at the conservatory of the University of Stellenbosch in South Africa majoring in both piano and musicology.
After completing her studies, Rachelle joined Cape Town Opera as rehearsal pianist and vocal coach. She also taught at the Opera School of the University of Cape Town. Moving to Pretoria she served as Chorus Master and Assistant Conductor at the State Theater Opera. She founded the State Theater Philharmonic Choir and in a fruitful relationship with conductor Gérard Korsten presented a wide range of choral works including Bach's St. John Passion, the Brahms and Verdi Requiems, and many more.
For her contributions to opera in South Africa, she was awarded a FNB/Vita award with special mention of her work with the State Theater Opera Chorus and the Nederburg Opera Prize – South Africa’s premier opera award. Throughout her operatic career in her home country, she maintained a busy concert schedule accompanying local and visiting singers and instrumentalists, including serving as an official accompanist for the International String and Vocal Competitions in Pretoria.
In 1998 Rachelle moved to New York City as Head Vocal Coach and Assistant Conductor of Bel Canto at Caramoor with Will Crutchfield. Her work with the young artists of this company was featured in an article in Early Music America. Balancing her love for opera and song literature, she maintains a busy vocal coaching studio and enjoys recital collaborations when time permits.
Rachelle’s studio includes professionals whose careers take them to the largest opera houses of the world and younger singers still on the verge of a professional career. While her range of repertoire is wide, she has made a name for herself in New York City as a specialist in the Italian style - Handel, Mozart, and the bel canto masters, including Verdi.
After working at Manhattan School of Music as Head Vocal Coach, Rachelle joined the faculty of Westminster Choir College in Princeton where she teaches a variety of performance-based classes in addition to coaching students individually. She also teaches the Accompanying Class and Techniques of Coaching in the school’s collaborative piano curriculum.
Rachelle has a regular residency at the Palm Beach Opera as guest vocal coach to the Benenson Young Artist Program. She has taught master classes at a variety of training programs, conservatories and universities, including Boston Conservatory at Berklee, the University of Missouri, Kent State University, and Dickinson College. Her master class topics, while related to bel canto, her main field of study, explore the wider application of the bel canto approach to singing. These topics include: One breath impulse per phrase: Legato in practice, Legato and Language: Breath and Consonants, Recitative Study Techniques, and The Italian Opera Libretto: First Things First When Studying a Role.
In addition to regular concerts at the Caramoor Festival, Rachelle’s recital appearances in the United States include Weill Recital Hall, Opera America, the Bard Festival, the Monadnock Music Festival (Peterborough, NH), Music Mountain (Falls Village, CT), Van Cliburn Concerts (Fort Worth, TX), National Gallery Recitals (Washington, DC), Art Song of Williamsburg (VA), and the Dame Myra Hess broadcast concert series (Chicago, IL) She has appeared multiple times as a guest on Garrison Keillor's Prairie Home Companion. Her recording Gabriel Fauré: 30 Mélodies (with tenor Steven Tharp) was released in 2015.
As a conductor Ms Jonck made her debut conducting the Orchestra of St Luke’s in collaboration with the David Parsons Dance Company soon after her arrival in the United States. She worked with this highly acclaimed orchestra again in collaboration with Pascal Rioult for New York Children’s Free Opera and Dance at the Kaye Playhouse.
Rachelle returned to South Africa to conduct Rossini’s Il barbiere di Siviglia at the Spier Festival in Stellenbosch. She made her operatic conducting debut in New York City conducting the Orchestra of St. Luke’s in their production of Bizet’s Le docteur miracle at the 92nd Street Y. For Caramoor she conducted Mozart’s Così fan tutte as well as Pauline Viardot’s Cendrillon. Since 2015, she has been the Music Director of Westminster Opera Theater Too (Westminster Choir College’s undergraduate opera program), where she conducted Pauline Viardot’s Cendrillon, Gilbert and Sullivan’s Iolanthe and Grétry's Zémire et Azor.
In the summer of 2017 Rachelle conducted Rossini’s Petite messe solennelle during Caramoor’s 20th-anniversary celebration and farewell season of Bel Canto at Caramoor. Other collaborations for the 2017/18 season included debuts at Baltimore Concert Opera and Opera Delaware conducting Massenet's Werther, a residency as guest coach at the University of Missouri-Kansas City including a master class in Recitative Study Techniques, master classes at the University of Missouri and Peabody Preparatory at Johns Hopkins and guest coaching at the Atlanta Opera Studio Program. During the summer of 2018 she established a role study program at Teatro Nuovo (Will Crutchfield's new bel canto venture.) She lead 45 young singers in studying Mozart roles from his five mature Italian operas (Idomeneo, Le nozze di Figaro, Don Giovanni, Così fan tutte, and La clemenza di Tito). The Mozart Project introduced singers to a structured way of studying a new role starting with libretto study (including basics of Italian poetry), recitative study techniques, ornamentation and cadenzas and culminating in memorization techniques. In the 2018/2019 season she led Don Giovanni for Baltimore Concert Opera's 10th Anniversary Season. She was named Music Director of Baltimore Concert Opera in 2019.
Upcoming engagements include Le nozze di Figaro for Westminster Choir College, La gazza ladra for Teatro Nuovo and Madama Butterfly and Anna Bolena for Baltimore Concert Opera.