Alonso worked as a paralegal in Criminal, Labor and Administrative Litigation at a several Law Firms in Mexico City, between 2012 and 2013.

Already graduated Alonso worked at Banco de México between 2014 and 2016, as a lawyer in Constitutional Amparo and Administrative Proceedings in which the central bank participated.

Moreover Alonso collaborated with several Law Firms in Mexico City and companies, as Grupo Televisa, as lawyer in Telecommunications and Economic Competence Litigation.

Since 2019 Alonso joined Sepúlveda y Díaz Noriega, S.C., where he actually collaborates in Civil and Commercial Litigation, Constitutional Amparo and Administrative Proceedings.