He married Olga Chetverikova, the daughter of the [[priest]] Fr. Sergius Chetverikov who was the [[chaplain]] of the Russian Student Christian Movement.
Serge began teaching at the St. Sergius Theological Institute in 1944. He also began writing and produced two papers: ''On the names of God''and ''Theological issues related to the dogma of Chalcedon''. In 1952, Serge moved to the United States with his wife and three daughters to teach dogmatics at St. Vladimir's Seminary. The [[seminary]], then headed by Fr. Georges Florovsky, was located in Manhattan in rented facilities of the Union Theological Seminary. At St. Vladimir his first challenge was linguistic, as he had to improve his English in order to lecture. This he did, not with great perfection, but with great zeal, which reflected his total dedication to the young, [[missionary]] community of American Orthodoxy. He continued his writing, first in Russian and then later English.
With the resignation of Fr. Florovsky in 1955, Serge served as head of the seminary as provost and dean of students until the arrival of Fr. [[Alexander Schmemann]] in 1962. After Fr. Alexander's arrival, he continued as provost, responsible for personnel, finances, and facilities operation at the seminary's new campus in Crestwood, New York until his retirement in 1981.