Ryant began to practice law in Hamilton. Ryan was prosecuting attorney of
Butler County, Ohio from 1848 to 1852. In January 1853, he represented the 3rd Congressional District at the Democratic State Convention. Ryan was a representative to the National Democratic Convention in 1856. In August 1861, the
U.S. War Department authorized Ryan to organize an "Irish Regiment". Ryan played a key role in organizing the
50th Ohio Infantry which only included men of Irish descent. He was appointed by Governor
William J. Dennison Jr. to serve as the regiment's
Colonel. However, he died before the regiment saw action. ==Personal life==