Samuel Soegiarto is a co-founder of the Apologetika Indonesia (API) movement, part of the Grace Alone Ministry (GRAMI). He holds a Masters in Theology (M.Th.) from STT-SAAT in Malang. In 2015, he took an intensive course of apologetics at Ravi Zacharias International Ministries, Chennai, India.
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Samuel is very passionate in serving young people, especially in outreach through the preaching of the gospel to equip them to become disciples of Christ and blessings in the midst of the world. He served as a youth minister at GKA Gloria Pacar, Surabaya, before entering the campus ministry. At present, Samuel serves as the Head of Spirituality Center and lecturer in Religion at Petra Christian University, Surabaya.