During law school, Justin served as a senior editor of the Rutgers University Law Review and a judicial intern to the Honorable Freda L. Wolfson of the United States District Court for the District of New Jersey. Prior to law school, Justin worked as a senior chemist at a multinational food services ingredient provider. In that role, he developed recognizable "clean label" ingredient solutions to replace commonly used chemically modified ingredients in the food industry. In the luxury products division of a major cosmetics company, Justin developed and launched more than 30 innovative skincare and suncare formulations. He is also attributed as an inventor of a patented customizable skincare technology.