[3] Anderson was elected Bishop of South Dakota in March 1984, and was consecrated on July 27, 1984, at the Cathedral of Our Lady of Perpetual Help, Rapid City, South Dakota, by Bishop John Allin.
[5] In 1998, he resigned his position at the seminary to become the eleventh headmaster of St. Paul's School in Concord, New Hampshire.
[6] In 2005, Anderson retired from St Paul's, two years ahead of schedule, over his compensation, handling of the school's money and other matters.
This came about when the school came under investigation by tax authorities after falling short of its fund-raising goals.
In 2007, he became rector of Emmanuel Church on Orcas Island, and served as assistant bishop in the Diocese of Olympia, until 2014.