Joseph Ammerman graduated from Dickinson College and earned a J.D. from the Dickinson School of Law. He served in the United States Army and held various positions, including district attorney of Clearfield County, United States attorney for the Western District of Pennsylvania, and member of the Pennsylvania State Senate. Ammerman also served in Congress and later as a judge in Clearfield County.

Joseph Ammerman's political career spans multiple roles, from military service to judicial appointments, reflecting a versatile approach to governance. His tenure in various positions, including as a district attorney and state senator, suggests a deep-rooted commitment to local issues and interests. Ammerman's participation in the Democratic National Convention and his role as a U.S. attorney indicate a blend of ideological alignment with party principles and a focus on law enforcement. His unsuccessful reelection bid in 1978, followed by a return to judicial roles, hints at a strategic withdrawal from partisan battles to focus on judicial integrity. Ammerman's legacy, marked by a portrait in the Clearfield County Courthouse, underscores a lasting impact on local governance and legal systems.