Ilona Sie Dhian Ho started her violin studies with Caroline Ingen-Housz. She continued at The Hague Royal Conservatory where she studied with Hans Scheepers, Vera Beths, Davina van Wely and Jaring Walta. From age eleven on she won prizes in national violin competitions like the Lordens Viooldagen, the Princess Christina Competition, the AVRO (radio) Competition and the Nationaal Vioolconcours "Oskar Back" in Amsterdam. She continued her studies in the USA with Mauricio Fuks at the Indiana University School of Music in Bloomington.
In 1994 she was concertmaster of the Jeunesses Musicales World Youth Orchestra and made concert tours through Canada and Europe, performing the violin solo in the Manhattan Concerto by Siegfried Matthus in several major Concert Halls, like the Philharmonie in Berlin.
Ilona Sie Dhian Ho developed a particular interest in teaching. While still a student, she was invited to teach at the String Academy in Bloomington. She was also an assistant to Mauricio Fuks at the Chateau de Champs master class in Paris, as well as the Sommer Akademie of the Mozarteum in Salzburg.
After returning to the Netherlands, Ilona Sie Dhian Ho took a professorship at the North-Netherlands Conservatory and the "Van Zweden School of Music", a school for talented young violinists. Since fall 2001 she is also a professor at The Hague Royal Conservatoire. Her own violin course, of which her aim is to make participants aware how they can teach themselves by using creative practice methods, has attracted students and teachers from many Universities. After giving master classes and concerts at the Peter the Great Festival, Russian colleagues invited her to teach in St.Petersburg.
She has a Duo with pianist Hans Eijsackers. Ilona Sie Dhian Ho plays a Lorenzo Ventapane (Napels, 1802).