Sekolah Tinggi Teologi Simpson (STT Simpson) is the only theology school formed under Gereja Kemah Injil Indonesia. The name "Simpson" was derived from the founder of Badan Misi ”The Christian & Missionary Alliance” (C&M.A), formed in 1888 in Nyack, New York, USA, that sent missionaries across the globe including Indonesia. STT Simpson was formed in 1983 in Semarang, Indonesia.