Justin prosecutes cases of retaliation, harassment, and discrimination in employment, housing, and other areas. He also litigates labor law, compensation, non-compete, leave, fraud, contract, and constitutional claims. In addition, Justin provides strategic advice to individuals, labor organizations, community groups, and other nonprofit organizations in non-litigation as well as contractual matters.

Justin has taught courses on employment law and civil rights litigation at the University of Minnesota Law School and Mitchell Hamline School of Law, and he spearheaded the development of the Workers' Rights Clinic at the University of Minnesota. He is also past Chair of the Minnesota State Bar Association's Labor & Employment Law Section and a past Officer of the National Employment Lawyers Association's Eighth Circuit and Minnesota Boards. Justin is fluent in Spanish.