Dr. Maria Emma Meligopoulou is a prominent figure in choral education in Greece, currently serving as Associate Professor of Choral Conducting at the University of Macedonia in Thessaloniki. She possesses postgraduate qualifications in Choral Conducting from Boston University's College of Fine Arts, as well as a Doctorate and Postdoctoral degree in Choral Performance and Pedagogy from Ionian University. This academic background allows her to blend scholarly rigor with artistic vitality.

Dr. Meligopoulou has conducted extensively across Europe, North America, South America, Asia, and Africa, premiering significant choral-symphonic works and earning numerous gold awards with her ensemble, the Choir of Ss. Cyril & Methodios. Her collaborations with the Thessaloniki State and Municipal Orchestras, her role as Artistic Director of the Thessaloniki Concert Hall Choral Festival, and her frequent participation as a juror and lecturer in international forums firmly establish her as an ambassador of choral innovation and excellence.

Additionally, Dr. Meligopoulou is the author of several academic textbooks, including Introduction to the Art of Choral Praxis (2011) and the digital academic textbook Choral Art in History, Theory & Practice (2023), published by University Editions "Kallipos." She is also involved in the score editing of choral music by both Greek and international composers.

Māris Sirmais is a name well known in the world of choral music – he is also an active supporter and developer of Latvian choral culture, a charismatic conductor able to inspire thousands of amateur choristers at the Song Festival as well as professional musicians. Sirmais is generating ideas non-stop – usually grand projects are the result. He is also an ardent Latvian patriot of wide international scope when it comes to his work.

Artistic Director of the State Choir Latvija since 1997, Māris Sirmais has also reared one of the most splendid symbols of the Latvian choral culture, the Youth Choir Kamēr... he conducted since its foundation in 1990 to 2012. Head of the Choir Conducting Department at the Jāzeps Vītols Latvian Academy of Music, Sirmais is also a jury member of international contests in choir singing and conducting. A recipient of the Order of the Three Stars, the Honorary Member of the Latvian Academy of Sciences, Sirmais has received many titles and awards for his achievement in culture and his contribution in making Latvia known throughout the world.

Māris Sirmais obtained a Bachelor's degree in conducting from Jāzeps Vītols Latvian Academy of Music, later pursued studies in orchestra conducting at College of Music and Performing Arts in Graz, Austria.

Z. Randall Stroope is an internationally acclaimed composer and conductor. He has conducted concerts in 26 countries, including recent engagements in Indonesia, Bruges, Rome, Hong Kong, Barcelona, Singapore, Dublin, Stockholm, Beijing, and Madrid. He is the Artistic Director/Conductor of two international summer music festivals. Randall has conducted music for mass at the Vatican on 14 different occasions. As an honorary member of the board of the Italian Choral Directors Association, he recently taught composition and conducting for three summers in northern Italy. In the United States, Randall has conducted 42 times at Carnegie Hall and other prestigious venues.

He conducts a professional choir that has done concert tours to the Baltics, Italy, Netherlands, Spain, France, and Switzerland since 2022. Randall has degrees in piano performance, vocal performance, economics, history, conducting, and extensive graduate study in composition. Randall did post graduate conducting work with Margaret Hillis of the Chicago Symphony, and composition study with Normand Lockwood and Cecil Effinger, both students of the famous French teacher/composer, Nadia Boulanger (student of Gabriel Fauré).

Dr. Stroope has written commissions for orchestras, soloists, choral ensembles, and works for combined forces. Recent commissions include the Raffles Singers (Singapore), Müller Chamber Choir (Taiwan), Choir of Maritime University of Szczecin (Poland), UT Insieme Vocale-Consonante (Italy), National Concerts (New York City), among others. Recordings of his over 200 published works can be heard on Spotify, YouTube and his website (www.zrstroope.com).

Aris Sudibyo is a choir conductor, vocal teacher, music minister, music and church music educator, choir coach for many choirs in Indonesia, and a national and international adjudicator. He is the Founder and Director of Wakhu Bhim Choir of Papua (Indonesia) and a pioneer of the choral movement in Papua. He also serves as a Provincial Committee Member of the Foundation for the Development of Choral Music in Indonesia.

He is the Director of the Sacred Music Institute & Choral Activity at Petra Christian University Surabaya (Indonesia) and has been a member of the World Choir Council of the World Choir Games since 2012. Throughout his career, he has led many Indonesian choirs to achieve top prizes in international choral competitions around the world. His most recent achievement is leading the Petra Christian University Choir to win First Prize at the Singapore International Choral Festival 2024.

Together with Onny Prihantono, he founded and organizes the Petra Cantare International Choral Festival and Petra Musica National Instrument and Vocal Competition, establishing Petra Christian University as a growing and impactful music hub in Surabaya, inspiring many musicians and choirs.

Dr. Maria Theresa Vizconde-Roldan is an accomplished choral pedagogue and children's choir conductor. She achieved Summa Cum Laude honors when she earned her Doctor of Musical Arts (DMA) in Music Education from Saint Paul University Manila. Additionally, she holds a bachelor's degree in music education, where she graduated CumLaude, and a master's degree in choral conducting from the University of Santo Tomas Conservatory of Music, where she is currently a faculty member and the Music Education Department Coordinator.

She is the founder and conductor of the Young Voices of the Philippines (YVP) and has led the choir to remarkable achievements, winning four first-prize trophies in the Youth Choir Historical, Folk, Gospel/Spiritual and Contemporary Categories at the 12th Golden Gate International Choral Festival in the USA made history by becoming the first choir from the Philippines to perform at the historic Carnegie Hall's Isaac Stern Auditorium/Perelman Stage in New York City and at the Dekelboum Concert Hall of The Clarice Smith Performing Arts Center in Maryland, USA, and received several prestigious awards, including ANING DANGAL (Harvest of Honors) and two consecutive AWIT AWARDS for Best Recording by a Child or Children.

Furthermore, YVP sang at the inaugural World Children's Day in Rome and had the privilege to sing and bless Pope Francis in Da Piazza San Pietro in Vatican City. In June 2025, the group visited Spain for Montserrat's 1000th Anniversary, YVP performed at iconic venues like Abadia deMontserrat, La Sagrada Familia, Monestir de San Cugat, Capella del'Esperança, Casa de Cantabria, and Iglesia San Bartolomé Apóstol.

Theresa has been invited to serve as a guest conductor, choral clinician, and adjudicator, and has held lectures and workshops on conducting, choral performance, and music education at various events in countries such as the Philippines, Australia, China, Denmark, Finland, Hong Kong, Hungary, Indonesia, Italy, Japan, Malaysia, Macau, Singapore, South Africa, South Korea, Taiwan, and the United States of America. Furthermore, she has served as the chairman of the National Music Competitions for Young Artists Foundation's choir competition (NAMCYA), as a music teacher and coordinator of the Arts Subject Area at the Ateneo de Manila University (ADMU) High School Department.

Theresa and her husband, Jude, founded the Treble Choir Association of the Philippines to promote Filipino choral music enhances children's choir performance and music education. In line with their advocacy, Theresa and Jude arranged Filipino folk songs, wrote choral music and books for children's choirs, Groundwork for Part-Singing, and contributed articles to the International Federation for Choral Music (IFCM) Choral Magazine. They organized a series of workshops for conductors titled Groundwork for Choirs and championed the choral methods, GESTAPHOR, for which Theresa is known. The Roldans and Muziksea produced the Maria Theresa Vizconde-Roldan Choral Adventures Series to promote Philippine choral music and Southeast Asian composers with new choral literature.