His professional practice focuses in administrative contentious matters. His experience comprises public service and private practice, as well as a strong connection with the academic sector.
He is a partner at SAI Law and Economics since February 2018. He represents companies and individuals in administrative, regulatory (telecommunications, broadcasting, hydrocarbons, electricity, etc.) and competition amparo proceedings, having a constant presence in the specialized courts of the Federal Judicial Branch ever since they were created in 2013. He also represents clients before the Federal Economic Competition Commission (COFECE) and the Federal Institute of Telecommunications (IFT), in investigations regarding anticompetitive practices and illicit concentrations. He has been recognized in the individual ranking of Chambers and Partners Latin America (guidelines for the years 2016, 2017 and 2018; antitrust law in Mexico), that has written the following about him:
Partner José Ángel Santiago Ábrego is described by clients as "a brilliant lawyer who knows a lot, is learning a lot and will soon be one of the most admired antitrust professionals." His experience includes working at the competition regulator, and he handles amparo proceedings, cartel investigations and merger approval issues.
In the public sector, he worked in bodies of the Ministry of the Interior and in the former Federal Competition Commission (FCC), where he elaborated and negotiated legal amendments initiatives, including one initiative to design the judicial challenging of economic competition decisions.
He has been guest professor at the National Institute of Criminal Science and the Universidad Panamericana Law School, where he has taught workshops of legal argumentation to public officials and economic competition-specific modules (both in specialized seminars and in the masters in economic law). Currently, he is tenured professor of the course Constitutional Procedures taught in the Law Degree program of Instituto Tecnológico Autónomo de México (ITAM). He is co-author of two books regarding antitrust and telecommunications law.
He obtained his law degree from the ITAM, where he graduated with special honors.
Currently, he holds the Chair of the Economic Competition Committee of the National Association of Enterprise's Lawyers (ANADE) for the biennium 2017-2018. Previously, during the biennium 2015-2016, he was the First Vice Chair of that committee. His duties in this bar association include the organization of academic events to debate the current issues in the matter, as well as imparting conferences in several forums and formulating opinions regarding resolutions, judgments, regulation projects, among others.