[2] Moon worked as a nuclear reactor physicist at Argonne National Laboratory from 1959 to 1964.

[2][3] He subsequently completed a Master of Divinity at Nashotah House, an Episcopalian seminary, in 1965.

[2]In 1967, Moon joined the natural sciences faculty of Shimer College in nearby Mount Carroll, Illinois.

Moon's leadership style as president was characterized as "collegial and low key", and he was credited with providing a necessary calming influence during the difficult negotiations surrounding the liquidation of the Mount Carroll Campus.

[4] During Moon's subsequent tenure, enrollment more than tripled, from 40 students to 130, and the new Waukegan campus was expanded from two buildings to 12.