Keating entered the Cistercian Order in Valley Falls, Rhode Island in January, 1944. He was appointed Superior of St. Benedict's Monastery, Snowmass, Colorado in 1958, and was elected abbot of St. Joseph's Abbey, Spencer, Massachusetts in 1961. He returned to Snowmass after retiring as abbot of Spencer in 1981, where he established a program of ten-day intensive retreats in the practice of Centering Prayer, a contemporary form of the Christian contemplative tradition.