Alexis has mainly participated in advising and representing clients in tax litigation at federal and state level, as well as in the attention of proceedings before the tax authorities. Likewise, Alexis has participated in the representation of the Central Administration of Large Taxpayer Litigation of the Servicio de Administración Tributaria and the Procuraduría Fiscal de la Federación before both federal and local authorities. Alexis' practice has also focused on antitrust, energy and administrative matters.