Born in Surabaya, Rev. Billy Kristanto has served in church music ministry since Sunday school. After graduating from high school, he continued to study music majoring in harpsichord in UdK Berlin. In 1996, he continued with post-graduate studies in the Royal Conservatory Den Haag with Ton Koopman in harpsichord and with Stanley Hoogland in fortepiano. He graduated in 2002 from STTRII with a Master of Christian Studies degree. In 2005 he was ordained as a pastor in the synod of IREC and is currently shepherding the IRECs in Europe. In 2009 and 2011 he finished his doctorate studies with the degree of Dr. phil. in musicology and Dr. theol. in systematic theology from the Ruprecht Karl University of Heidelberg. He is also a member of the Theological Commission of World Reformed Fellowship.

First came to GRII in 2003 while taking his Design Bachelor’s Degree at UPH Karawaci. From then on, with the growing urge and calling to serve God as His servant, he continued to serve in youth ministry of GRII Karawaci up until 2012 when he entered STTRII Jakarta. He received his Master of Theology in 2015, and has since served as an assistant pastor; from 2015-2018 in GRII Bintaro, and in 2018-2021 in both GRII Solo and GRII Yogyakarta. At the moment, he is continuing his doctoral study in Theologische Universiteit Apeldoorn, Netherlands.