His father, Oscar Carl Kreinheder (1877-1946), was a pastor of the Lutheran Church–Missouri Synod and the president of Valparaiso University from 1930 to 1939.
After a successful career as a businessman, Arthur Carl Kreinheder went 1950 to study theology at Lund University in Sweden, living in St. Laurence Foundation.
"The Congregation of the Servants of Christ", a Lutheran Benedictine community, was established at St. Augustine's House in 1958 when some other men joined Father Arthur in observing the monastic life and offices of prayer.
Father Arthur was involved in Christian ecumenism and he was the U.S. secretary of the League for Evangelical-Catholic Reunion.
At the age of 84 Father Arthur Carl Kreinheder died (on Friday, October 13, 1989) in a Pontiac, Michigan, hospital.