He was a reporter for The Atlanta Journal from 1948 to 1950.[3] He worked for the Westinghouse Electric Corporation from 1956 to 1960.[3]
He worked for McKinsey & Company, serving as Partner in New York City and London, and Chief Executive Officer, until he was Managing Director when he retired in 1977.[4][5] That year, he was appointed Deputy Special Trade Representative and Ambassador in charge of the U.S. Delegation to the General Agreement on Tariffs and Trade in Geneva.[5] In 1979, he was appointed Assistant to the President of the United States and White House Staff Director under President Jimmy Carter.[5]
He served as President and Vice Chairman of the Bendix Corporation from 1981 to 1983.[5] In 1981, he also became a faculty member of the Harvard Business School and served as Senior Counselor to the Dean until 1987.[5]
In 1983, he founded the Avenir Group, a private investment bank.[5]
In 1991, together with Os Guinness, he co-founded the Trinity Forum, a Christian non-profit organization, where he served as Senior Fellow and Trustee Emeritus.[4][5] He donated to The Fellowship.[4]
He was married to Suzanne McDonald, and they had four children.[4] They resided in Birmingham, Michigan.[4] He converted to Roman Catholicism at the age of seventy-nine.[4] He has 12 grandchildren.
His son Alex McDonald is an author of books regarding the Israeli Palestine conflicts.