During his early years, 1962-1980, Hathaway established the Mental Health Clinic in Logan County, Ohio; served on the Michigan State Governor's Conference on Student Leadership and the Advisory Board for Planned Parenthood of Northern Virginia, and was an instructor of religion and ethics at Madeira School in Virginia.
In the mid-1970s Hathaway became involved with a group of conservative evangelical clergy and lay leaders in the establishment of Trinity Episcopal School for Ministry in Ambridge, Pennsylvania.