A graduate of Westminster Choir College, New Jersey, Eunice Tong studied under the tutelage of Joseph Flummerfelt and Andrew Megill. Whilst there, she was able to perform with Pierre Boulez, Sir Colin Davis, Lorin Maazel, Rafael Frühbeck de Burgos, Neeme Järvi, Anton Armstrong, Alan Gilbert, Dale Warland, and Joseph Flummerfelt.

Eunice has been the Chorus Master of Jakarta Oratorio Society since 2006, leading the choir to perform the greatest works of Bach, Brahms, Handel, Mendelssohn, Bernstein, and many more. Until recently, Jakarta Oratorio Society as the choir-in-residence of Aula Simfonia Jakarta is an ensemble with the most demanding choral repertoire performances in Indonesia, with up to 5 major works per year.

As the Assistant Conductor of Jakarta Simfonia Orchestra, she is engaged to conduct concerts such as Symphonic Series, Mass and Oratorio Series, Concerto Series, and the beloved Family Concert Series.

Since its opening in 2009, Eunice has been assigned as the Managing Director and the Director of Artistic Planning of Aula Simfonia Jakarta, working alongside with many local musicians and corresponding with international artists. In 2020, when the pandemic took over the world and silenced many halls, Eunice passionately introduced the Chamber Music Society of Aula Simfonia Jakarta. In this setting, music can be played by Indonesian musicians and chamber music repertoires are gently brought back to the attention of classical music lovers.