Sebastian is a lawyer from EAFIT University, with a specialization in Public Management. He also holds a Master´s in Public Law from the Universidad de Los Andes. He currently works as a researcher in the Judicial System line at the Center for the Study of Law, Justice, and Society (Dejusticia), where he has worked on issues related to access to justice, judicial independence, criminal justice, land restitution, and policing. He has been an author and co-author of several books and articles on these issues. He also worked for the Colombian Constitutional Court until 2012.