Briggett taught for 11 years at John M. Gandy Elementary School in Ashland before being called to the priesthood. She attended Virginia Theological Seminary in Alexandria and was ordained deacon by the Right Rev. Peter Lee, then before being called to the priesthood. She attended Virginia Theological Seminary in Alexandria and was ordained deacon by the Right Rev. Peter Lee, then bishop of the Diocese of Virginia. She was ordained priest in 1992. Her first church after ordination to the priesthood was in Ohio. She then moved to Newark to serve two successive churches there. She retired in July 2016 and moved back to Virginia.