Jonathan has served as Wisconsin’s 19th State Assembly District Representative since January, 2014. 

Jonathan has continued to serve the Milwaukee community since he took office.  He volunteers weekly at Pathfinders, a youth shelter, and at the Maryland Avenue Montessori school.  In addition, Jonathan maintains close ties with  Dryhootch, a veteran-focused nonprofit, and is an active alumni with Milwaukee’s Public Allies program.Jonathan graduated from University of Wisconsin-Milwaukee with a degree in political science. While in college, he worked for Senator Tom Harkin in Washington D.C., was the Chair of the UWM College Democrats, and completed the United Nations Summer Seminar program. 

 Jonathan is married to Diana Vang-Brostoff whom he met while at UWM. She is a Clinical Social Worker at the Clement J. Zablocki VA Medical Center.Jonathan’s father, Alan, is a retired attorney, mediator and arbitrator.  His mother, Phyllis, is a social worker and co-founder and co-owner of Stowell Associates, which has provided managed home care to elderly persons and disabled adults since 1983.