Dan grew up on Chicago’s South Side with his parents and three brothers. He attended Brother Rice High School, where he was named valedictorian and captain of the school’s first sectional championship basketball team. He completed his undergraduate degree at the University of Notre Dame prior to attending Valparaiso University School of Law, where he served as a note editor on the school’s Law Review.

Following law school graduation, Dan worked as a Cook County Assistant State’s Attorney for 16 years. In that role, he prosecuted domestic abusers, violent gang members and narcotics traffickers, while completing his tenure as supervisor of the Complex Narcotics Unit. In 2017, he began working for the U.S. Department of Justice where he served as Division Counsel for the Chicago Field Division of the Drug Enforcement Administration (DEA). As Division Counsel, Dan handled legal matters for the DEA in Illinois, Indiana, Minnesota, North Dakota and Wisconsin, and conducted trainings for state, local and federal law enforcement officers across the country.

In February 2019 Dan was appointed by the Illinois Supreme Court to serve as a Circuit Court judge in Cook County.

He resides in Evergreen Park with his wife, Claire, and their two children.