Brennan was a long-time circuit court judge in Milwaukee County from 1999 to 2008 and is a current Trial Attorney with Gass Weber Mullins LLC a Milwaukee-based law firm. Brennan was appointed by former Wisconsin Governor Tommy Thompson to the judgeship in Milwaukee County and was subsequently re-elected in 2000 and 2004
Before becoming a judge, Brennan was a law clerk for former Federal District Judge Earl Warren for the Eastern District of Wisconsin after graduating from law school at Northwestern Law and served as an attorney for Foley and Lardner handling complex commercial and constitutional cases. While at Foley, Brennan also served as a public service prosecutor in the Milwaukee County District Attorney's Office, which enabled him to try a number of cases as the lead trial lawyer. In addition, Brennan taught the Federal Courts class at Marquette Law.
Government Accountability Board
- Members of the Wisconsin Government Accountability Board
- Judge Brennan's Biography at GassWeberMullins