Sellers is Professor of Law at the University of Texas School of Law. He teaches and writes in the areas of election law, constitutional law, race and the law, and American politics. Sellers is widely published and has received numerous accolades, including the esteemed Berlin Prize from the American Academy in Berlin, and honors from the AALS Section on Election Law. He is an elected member of the American Law Institute and currently serves as an advisor on the Institute's Election Litigation project.