Yakub Tri Handoko, or his more familiar greeting, YTH, is a co-founder of the Apologetika Indonesia (API) movement, and co-founder of Grace Alone Ministry (GRAMI) which he founded with colleagues from various church denominations. YTH holds a Masters in Theology with the best award from International Theological Seminary, Los Angeles, USA. YTH holds a Doctor of Philosophy in New Testament at North-West University South Africa (in collaboration with Greenwich School of Theology London).

YTH had served as a permanent lecturer, academic dean and chair in the STT Injil Abdi Allah before becoming pastor of the Reformed Exodus Community (REC) session. Currently, YTH also actively teaches at the Sekolah Tinggi Awam Reformed (STAR), STT Aletheia Lawang and STT Amadeus Surabaya. In addition to being an STT lecturer and church pastor, YTH is active in conducting seminars and sermons in various churches, universities and Christian institutions, both at Indonesia and abroad.