The IITIS cooperates with the United Evangelical Mission (UEM) and its related institutes of education in Africa and Asia, and with other institutions:
- Duta Wacana University (Indonesia, Java)
- Makumira Theological Seminary (Tanzania)
- Pilgrim Theological College der University of Divinity (Melbourne, Australia)
- Presbyterian College and Theological Seminary (Seoul, South-Korea)
- Satya Wacana University (Indonesien, Java)
- Siliman University (Philippines)
- Université Libre des Pays des Grand Lacs (Goma, DRCongo)