Elected at 26, Justin represented Prince George's County in the Maryland House of Delegates for over 10 years where the Washington Post hailed him as "among the Maryland legislature's brightest young stars." Serving on the House Ways & Means Committee, Justin developed an expertise in state and local taxation matters, economic development and state transportation funding. As a chief deputy majority whip, the Post noted that the leadership title "understates the importance of the role he has played in recent years helping round up votes for key pieces of legislation." Justin also spent more than a decade working in commercial property development and leasing and also has experience in investor and labor relations as well as marketing commercial real estate. A lifetime resident of Prince George's County, Justin remains active in a number of charitable Prince George's County organizations.