Though his mother was a Christian, Tengku grew up surrounded by Islam in Indonesia. It took three near-death experiences before he gave his heart to the Lord. He started teaching Sunday school and youth group. Later, at seminary, Tengku felt called to work among Muslims in North Sumatra. For nearly ten years, Tengku worked with Cahaya Suku, leading church-planting work among several unreached people groups. In 2007, he took over leadership of Northern Sumatra Mission.
Learn more about Northern Sumatra Mission.