In 1952, he moved to New York City to become chaplain at Columbia University, a post he retained till 1965.
As bishop, he was a member of the Standing Commission on Ecumenical Relations and was involved with the Consultation on Church Union.
[7] Krumm retired in 1980 and became Bishop of the Convocation of Episcopal Churches in Europe, residing in Paris until his resignation in 1984.
In 1983, he became bishop-in-residence at St Paul's Church in Tustin, California, and also Assistant Bishop of Los Angeles.
[8] Krumm died suddenly on October 23, 1995, in Tustin, California, after suffering a heart attack.