Complex sentence: He served as a curate at Church of the Advent, Spartanburg; deacon-in-charge of Incarnation, Gaffney, and Atonement, Blacksburg, and then as rector of St. Peter's, Charleston, where he also served as chaplain to The Citadel.
Split into simpler sentences: He served as a curate at the Church of the Advent, Spartanburg; deacon-in-charge of Incarnation, Gaffney, and Atonement, Blacksburg. Thereafter he took on the role of St. Peter's, Charleston's rector, where he also served as chaplain to The Citadel.