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Diarmuid Fionntain O'Scannlain

Senior judge · U.S. Court of Appeals for the Ninth Circuit

Diarmuid Fionntain O'Scannlain serves on the U.S. Court of Appeals for the Ninth Circuit. Appointed by Ronald Reagan and confirmed Sep 25, 1986. ABA rating: Qualified.

Appointed by
Ronald Reagan
Confirmed
Sep 25, 1986
ABA rating
Qualified
Born
1937

Appointments

  • Judge, U.S. Court of Appeals for the Ninth CircuitRonald Reagan · Sep 25, 1986

Education

  • St. John's UniversityB.A., 1957
  • Harvard Law SchoolJ.D., 1963
  • University of Virginia School of LawLL.M., 1992

Career

U.S. Army Reserve, JAG Corps (retired as major), 1955-1978; Tax attorney, Standard Oil Company of New Jersey and New York City, 1963-1965; Private practice, Portland, Oregon, 1965-1969, 1975-1986; Deputy attorney general, State of Oregon, 1969-1971; Public utility commissioner, State of Oregon, 1971-1973; Director, Oregon Department of Environmental Quality, 1973-1974; Consultant, Office of the President-Elect of the United States, 1980-1981; Team leader, President's Private Sector Survey on Cost Control (Grace Commission), 1982-1983; Chairman, Advisory Panel to the Secretary of the U.S. Department of Energy, 1983-1985

More

From the Federal Judicial Center’s biographical directory of federal judges.

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Capitol Receipts, “Judge Diarmuid Fionntain O'Scannlain, Court of Appeals for the Ninth…,” https://www.capitolreceipts.com/judge/j1385926/diarmuid-fionntain-oscannlain (accessed 2026-10-17).