Maestro Thiradej graduated with 2nd Class Honors from Bunditpatanasilpa Institute, Ministry of Culture, Department of Music Composition, International Music Studies Branch. He started his muscial education when he was a Grade 1 student at the College of Dramatic Arts (Wang Na), majoring in international music and piano. He chose singing as minor subject  and joined the choir of the orchestra of the College of Dramatic Arts, the experience of which resulted in his passion for the art of choir singing ever since.

His singing experience comprises the participation in two operas at the Bangkok Opera, i.e. Aida and Mae Nak, singing in concerts and important events, i.e. 106 songs hosted by Radio 106 FM, vocal performances during APEC Conferences, Thai Pride Concerts No. 6, 7 and 8, Boy Story by Boythakol Kiatwirawan, Government House League E, Thai-Chinese Connection Concert, the Thai-Brunei Event of the Department of Public Relations, etc. etc.  Maestro Thiradej has been a Tenor 2 singer of The Bangkok Voices since 2012 to the present and currently also teaches the piano.

Maestro Jiroj started his music career by playing the flute in the marching band of Wat Nuannoradit School in 1992. Later he studied music at Ban Somdet Chaopraya Rajabhat University, where in 1998 he had the chance to join the choir as singer with choir master Somchai Ratsamee and regularly participated in university activities. In 2013 Jiroj had the opportunity to become member of "The Bangkok Voices", and with them he performed at numerous concerts and also competed in many choral competitions.

Maestro Aphimuk graduated in Computer Information and Technology Program, Faculty of Education, Industry and Technology of King Mongkut's University of Technology, Thonburi,  and also a member of the university choir, known as KMUTT Chorus.

Studying in secondary school was the base of his experience in music, when he was  a member of the school's percussion orchestra and had the opportunity to compete in drum line for the Royal Cup Award which he won two years in the Junior Division.

His music experience started when studying in secondary school, as  he was a member of the school orchestra's percussion section and also competing in the drum line for the Royal Cup Award. He won the first prize for 2 years in the Junior Division and later competed in the Winter Guard International Competition in the USA, being ranked 12th in the world (in 2014 and 2017).  He is a member of the Bangkok Drumline Society, the first band of its kind in Thailand, which had previously been invited to perform in Japan. Further, he is a member of the Crystallize Percussion Ensemble. This relatively new band competes in the Open Division and has won the runner-up position in 2016.

His involvement with music allows him to meet new friends, new societies, new cultures, and gives him opportunities to learn and gain experience. Music also allows him the supremacy of seeing the wide world by making him travel to foreign countries. He, therefore, loves and appreciates "Music" for its integration of invaluable  experiences into his life. In 2017 he was given the opportunity to become a member of The Bangkok Voices in the tenor section.

Maestro Haggai holds a Bachelor of Music degree in Jazz Studies with a major in Jazz Piano from the College of Music, Mahidol University, graduating with First-Class Honors and a cumulative GPA of 3.92.

Haggai began his musical journey at the age of 16 as a pianist at Nampratai Buengkan Church, the principal church of Buengkan province—his hometown. Under the guidance and rigorous training of the local pastor, he received a strong foundation in both religious studies and music, eventually becoming a worship leader and vocal director for the church.

Upon entering university, Haggai committed himself fully to the study of jazz, specializing in Jazz Piano Performance. During his studies, he joined the MU Choir (2022–2025) as a Tenor 1 under the direction of Dr. Rit Subsomboon. With the choir, he actively participated in numerous performances and competitions both domestically and internationally, in countries such as Austria, Italy, Germany, and Poland. He was entrusted with the role of soloist throughout the choir’s competition tours and contributed to winning several prestigious awards, including:

⭐ Leonardo Da Vinci International Choral Festival, Chamber Choirs Category — 1st Prize Winner: Gold Medal (2023)

⭐ HARMONIE Festival, Mixed Chamber Choirs — 1st Prize Winner: Gold Medal (2024)

⭐ 1st Thailand International Choral Festival, Mixed Youth Choir — 1st Prize Winner: Gold Medal (2024)

⭐ 1st Thailand International Choral Festival, Gospel and Spiritual — 1st Prize Winner: Gold Medal (2024)

In late 2024, Haggai began formal training in classical voice, aiming to further deepen his vocal artistry. In 2025, he decided to step away from the MU Choir to pursue greater artistic growth in solo and ensemble vocal performance. He was subsequently invited to perform in various choral projects in Bangkok, including:

🎤 Siang Thai Chorus — directed by Mr. Kaiwan Kulavadhanothai, National Silpathorn Artist in Music (2020)

🎤 Calliope Chamber Choir — directed by Mr. Somtow Sucharitkul, National Artist in Performing Arts (2022)

In May 2025, Haggai officially became a member of The Bangkok Voices in the Tenor 1 section, embarking on a new chapter in international choral competition and professional performance.

Currently, Haggai works as an independent jazz vocalist and pianist, performing regularly throughout Bangkok and its vicinity. He also serves as the resident pianist at Music Square, a restaurant affiliated with the College of Music, Mahidol University.