Dr. Peter Kiarie was born in Kenya Colony on 8th March, 1942. He studied Philosophy and Theology in Morogoro Major Seminary Tanganyika between 1958-1962.

He carried out intensive research into Gikuyu Religion and Culture as Kenya emerged as the Independent Republic between 1962-1971.

He worked for the Kenya Conference of Catholic Bishops in the Kenya Catholic Secretariat fot 14 years 1971-1985 as National Secretary for the Departments of The Lay Apostolate, Religious Education, and Development and Social Services. He continued his intensive participatory research into Gikuyu Culture and Religion for another ten years 1985-1995.

He joined the Catholic University of Eastern Africa as a full-time student in the Faculty of Arts and Social Sciences, Department of Religious Studies, 1996-2005, and was awarded B A Hons, M A , and Phd in Religious Studies.

He lectured at CUEA in the fields of: African Culture, Phenomenology of Religion, Bible Studies and Critical Thinking. He retired from CUEA on attaining 70 years in June 2012.

He joined Kiriri Women University in July 2012 for a three-year contract ending in June 2015, as The Director Institute of Research and Development.

He has been on a self-sponsored sabbatical year spent in his Homestead and other African grassroots communities.

Dr. Kiarie is married to Mrs Sophia Wambui Kiarie for the last 46 years. They are blessed with sons and daughters. He lives with his family in Ruiru Town, Kenya.