Career
During the American Civil War, Schreiner served in the 25th Wisconsin Volunteer Infantry Regiment and lost an arm during a battle. Schreiner was a farmer and was in the abstract titles, fire insurance, and real estate businesses. Schreiner served as town clerk and town treasurer.
He also served on the Lancaster, Wisconsin common council and was president of the board of education.
Schreiner served as Wisconsin Circuit Court clerk for Grant County and as justice of the peace. In 1911, Schreiner served in the Wisconsin State Assembly and was a Republican.
Schreiner died at his house, in Lancaster, Wisconsin, after a long illness.