J. N. J. (Klippies) Kritzinger is an emeritus professor of missiology at the University of South Africa (UNISA). He was dean of the faculty of theology and religious studies at UNISA from 1999 to 2001, and editor of Missionalia from 1992 to 2009. He is an emeritus minister of the Uniting Reformed Church in Southern Africa (URCSA), which he served from 1993 to 2015. He is involved in the Northern Theological Seminary in Pretoria, which equips ministers for the URCSA.