MADISON, WIS. – After 34 years of service with the U.S. Attorney’s Office for the Western District of Wisconsin, U.S. Attorney Timothy M. O’Shea announced that he is retiring from the Department of Justice. Mr. O’Shea began his career with the U.S. Attorney’s Office as an intern in January 1991. He was hired as an Assistant U.S. Attorney in the criminal division in August 1991 and served in that role until 2002, when he was appointed Senior Litigation Counsel. Mr. O’Shea was appointed as First Assistant U.S. Attorney in 2018 and served in that role until March 2021. He also served as Acting Civil Chief from September 2020 to January 2021. He was appointed as Acting U.S. Attorney in March 2021 and then formally transitioned to U.S. Attorney in April 2022.
During his career as a federal prosecutor, Mr. O’Shea prosecuted a broad array of federal crimes including money laundering; tax crimes; bank, mail, wire, and credit card fraud; illegal weapons; narcotics; bank robbery; murder, attempted murder, and other violent offenses. He also had a particular emphasis in computer and intellectual property crimes, specifically trade secret theft, system intrusions, and illegal counterfeit and distribution of copyrighted material. He was the lead prosecutor in United States v. Sinovel, the first and only federal jury trial and conviction of Chinese company for trade secret theft. The prosecution team recovered more than $58 million in restitution for the victims. Mr. O’Shea was also an experienced appellate advocate, arguing more than 60 cases before the Seventh Circuit Court of Appeals.
As U.S. Attorney, he was considered the chief federal law enforcement officer in the Western District of Wisconsin, responsible for overseeing all federal prosecutions and civil litigation involving the United States within the district. As U.S. Attorney, Mr. O’Shea worked with Federal, State, and local law enforcement and intelligence professionals on issues related to gun violence. He also developed and participated in “Protecting Places of Worship” events held throughout the Western District of Wisconsin for law enforcement, public safety professionals, and religious communities.
“It’s been a privilege to serve the citizens of the Western District of Wisconsin and to work with such a dedicated and talented group of attorneys and legal professionals,” said Mr. O’Shea. “I greatly enjoyed my years with the Department of Justice, and for the last four years, it’s been an honor to serve Western Wisconsin as U.S. Attorney.”
Following U.S. Attorney O’Shea’s retirement, Assistant U.S. Attorney Chadwick Elgersma will serve as the Acting U.S. Attorney until a U.S. Attorney is formally nominated by the President and confirmed by the U.S. Senate. Mr. Elgersma has been an Assistant U.S. Attorney in the district since 2017. Prior to joining the U.S. Attorney’s Office, Mr. Elgersma was a Special Agent with the Federal Bureau of Investigation.
Last Update: Jun 30, 2025 5:47 am CDT
