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A. Daniel O’Neal

Sarah Jenkins
Sarah Jenkins
Lead Content Curator · Mar 12, 2026 · Updated Apr 13, 2026
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American lawyer

Arthur Daniel O'Neal Jr. was an American businessman. He chaired both the Washington State Transportation Commission and the (U.S.) Interstate Commerce Commission. He was on the board of directors at The Greenbrier Companies (GBX) until 2016.

Life

Arthur Daniel O'Neal Jr., was born to Arthur Daniel O'Neal Sr. and Louise Ragna O'Neal (née Nordahl) on May 15, 1936 in Bremerton, Washington. He went to Bremerton High School and studied Mathematics at Whitman College graduating in 1959. After graduating from the Naval Officer Candidate School (July 1959 – November 1959) in Newport, O'Neal reported to the USS Watts, a World War II destroyer. He served as a technical officer on that destroyer from 1959 to 1961. From 1961 to 1963, he served on the USS Charles E. Brannon, a destroyer escort. In 1965 he graduated from the University of Washington Law School. In 1966, O'Neal came on as Staff Counsel for the US Senate Commerce Committee. He served as legal assistant for the long-serving U.S. Senator Warren G. Magnuson of Washington from 1967 to 1969.Until 1973, he was Counsel for the Surface Transportation Subcommittee at the US Senate. During this time, he was involved, among other things, in the legislation for the establishment of the pa