Johnstone became SIL Global’s Executive Director in May 2025. He brought into that role 20 years of experience in leadership, Bible translation, literacy, and language development across Africa, having served with SIL Global and before that Bible Translation and Literacy (BTL) in Kenya. His work has been rooted in advancing educational and spiritual opportunities within African language communities so individuals and communities can flourish. Johnstone holds a PhD in leadership and governance from Jomo Kenyatta University of Agriculture and Technology, a master’s degree in educational studies from Africa International University, and a bachelor’s degree in commerce and economics from the University of Nairobi. Fluent in English and Kiswahili, and a native speaker of Lunyole and a number of Luhya languages, he brings valuable cultural insight and linguistic skills to his work. Johnstone lives in Nairobi, Kenya, with his wife, Esther.