The Reverend Fenhagen was a native of Baltimore, MD and graduated from St. Paul's School. He attended Washington and Lee University in Lexington VA before receiving his BA from the University of the South, Sewanee, TN in 1951. He received a Master of Divinity from the Virginia Theological Seminary in 1954, and in later years was awarded honorary degrees from the Virginia Theological Seminary, the University of the South School of Theology, and Washington and Lee University. The Reverend Fenhagen served as Rector of several parishes in Maryland, the District of Columbia, and at St. Michael and All Angels' Episcopal Church in Columbia SC before becoming active in academic settings. He was Director of the Church and Ministry Program at the Hartford Seminary Foundation. He was named President and Dean of the General Theological Seminary in New York City in 1978 and retired from there in 1992. He then became Director of the Cornerstone Project of the Episcopal Church Foundation, retiring in 1995. He came out of retirement to serve as President and Warden of the College of Preachers at Washington National Cathedral, from 2001-2004. He authored five books and lectured at and led conferences in the US and abroad. Locally, he served as the Chairman for the Georgetown County Mental Health Association and was a member of Friends of Brookgreen Gardens. He attended Holy Cross Faith Memorial Episcopal Church, Pawleys Island, SC.