Guillermo Villaseñor Tadeo

Practice Areas

Tax

Member of the Energy Industry Practice

Career

Guillermo has more than twenty years of experience in tax planning, including taxation of corporate restructuring transactions, mergers, acquisitions, and general tax advice, especially for business and multinational groups with operations in Mexico where he provides advice to achieve fiscal efficiency and provide assistance in developing tax policies for ongoing operations. His experience extends to transfer pricing, including the legal analysis of the implementation of policies, documentation and elaboration of economic studies and defense files to protect companies against potential tax investigations.  Guillermo has represented different industries before the Mexican Judiciary through constitutional (“amparo”) proceedings to contest the creation or amendments of tax laws that produce relevant economic negative effects, achieving tax refunds and the protection to future payments. He has also assisted multinational companies in complex cross-border tax litigation, in transfer pricing adjustments, cost-sharing arrangements, multinational restructures, and potential re-characterization of intercompany payments being able to successfully defend cases in the investigation stage or to reduce potential liabilities before contesting deficiencies before the Federal Tax Court.  Guillermo is a member of the firm’s Energy Industry Group, a group that includes practitioners of different law practice areas specialized in advising clients of the energy sector. Within the Energy Task Force, Guillermo specializes in tax laws affecting the energy sector. Prior to joining Sánchez Devanny, Guillermo was a partner at an international law firm where he was responsible of the tax litigation group, nationwide and lead tax counsel in different M&A transactions. He was named as “The National Expert” for his participation in the article Transfer Pricing 2018 included in the edition Getting the Deal Through, “Expert Panel 2018” by The Law Reviews for his participation in the Mexico Chapter of The Oil & Gas Law Review and “Contributor” by Chambers and Partners for his participation in the Global Practice Guides – Tax Controversy 2021. He is fluent in English and Spanish.

Professional Memberships

Member and official Speaker of the Tax Affairs Committee of the American Chamber of Commerce.

Member and Chair of the Legal and Tax Affairs Committee of the Canadian Chamber of Commerce.

Member of the National Association of Corporate Counsel

Member of the International Fiscal Association (IFA).

Member of the Association of International Petroleum Negotiators.