Judge Derek Mosley graduated from Marquette University Law School in 1995. After graduation he served as an Assistant District Attorney for Milwaukee County from 1995-2002. As an Assistant District Attorney, he represented the State of Wisconsin in over 1,000 criminal prosecutions. Mr. Mosley founded the Milwaukee County District Attorney’s Office Community Prosecution Unit. This unit places assistant district attorneys in various neighborhoods throughout the City of Milwaukee to reduce urban blight and to improve the quality of life. As the head of this unit, Mr. Mosley helped to establish after-school programs, he established a Second Chance Felony Employment Initiative for offenders, he closed 100 drug houses and nuisance properties, and started a police and citizen crime fighting initiative, which targeted street drug dealing. This initiative called “Operation Streetsweeper” was awarded the Law Enforcement Honor Award by the United States Department of Justice.
In 2002, Mr. Mosley was appointed Municipal Court Judge in Milwaukee. At the time of his appointment, he was the youngest African-American to be appointed judge in the State of Wisconsin, and remains one of the youngest judges in the country. Judge Mosley has established a Youth Development Boot Camp for juvenile offenders, and has helped establish a community court in Milwaukee. In August of 2004, Judge Mosley was appointed Presiding Judge of the Milwaukee Municipal Court. He was the youngest Presiding Judge in Milwaukee history.
Judge Mosley is a Past President of the Wisconsin Municipal Judges Association, as well as Vice President of the Board of Directors of the YMCA Urban Campus (Northside, Parklawn, & Downtown YMCA’s). He sits on the Board of Directors of Transcenter for Youth, and the Lad Lake Adolescent Residential Treatment Center. He has been a lecturer at Marquette University Law School, the University of Wisconsin-Milwaukee, and the State Bar of Wisconsin. He also serves on the Wisconsin Supreme Court’s Judicial Education Committee. Judge Mosley has been featured in both Milwaukee Magazine‘s “Top Lawyer Edition,” as well as their “35 Emerging Leaders” Edition. He was awarded the Milwaukee Times’ Black Excellence Award, the “Wisconsin Cares About Kids Award,” The Wisconsin Law Journal’s “Leader in the Law” Award, the Alpha Kappa Alpha Sorority, Inc’s “Trailblazer Service Award” and was “Mentor of the Year in 2008. Judge Mosley has also been featured in the Business Journal‘s “Forty under Forty.” Edition.