Background
O'Brien was born on July 20, 1893 in Fond du Lac, Wisconsin.
politician member of the Wisconsin State Senate
O'Brien was born on July 20, 1893 in Fond du Lac, Wisconsin.
University of Wisconsin–Madison.
He attended the University of Wisconsin-Madison, Marquette University and St. Norbert College. During World War I and World War II, he served with the United States Navy. He died in 1968 of a heart attack.
He was a Republican.
O'Brien was a member of the Senate from 1953 to 1964.