BertaViqueira Sierra


Madrid + 34.91.520.3917

Berta Viqueira focuses her practice on white collar crimes and internal company investigations. She has earned a reputation as a distinguished trial lawyer for legal strategy in numerous high-profile criminal proceedings. In addition her experience as an investigator covers a wide range of areas, including representing national and international companies in charges of corruption, trade secrets, embezzlement, health-related fraud, and unfair competition. Berta has been recommended among the top Spanish advisors in white collar crime by The Legal 500 and Best Lawyers.

Berta advises clients, in particular companies, and individuals in criminal disputes involving fraud, corporate, market and consumer, planning, and privacy offenses and money laundering and corruption in the public and private sectors. She represents clients, both on the complainant side and on the defendant side, from preliminary proceedings up to trial and subsequent appeal. Since the beginning of her professional career, Berta has focused on litigation and has extensive experience in fundamental rights.

Berta also represents and advises multinational companies, boards of directors, and senior management in internal, national, and international investigations. She works closely with clients to create strategies to quickly and efficiently resolve investigations in highly confidential matters in a wide range of industries, including pharmaceuticals, energy, infrastructure, and financial institutions.

Berta is on the faculty for the Diploma of High Specialization in Economic Criminal Law program at the School of Legal Practice at Complutense University of Madrid.


  • Global transportation company conducts internal investigation into leak of confidential business informationJones Day conducted an investigation on behalf of a global transportation infrastructure company into the leak of confidential business information, which resulted in identifying the culpable individual and taking action against the individual.
  • Merchant banking firm and Fortress Credit provide secured credit facility to Win SystemsJones Day represented a merchant banking firm and Fortress Credit Corp. in connection with a secured credit facility provided to Win Systems, an international developer of gaming machines software and manufacturer of gaming machines.
  • Greystar mergers three student housing companiesJones Day advised Greystar Real Estate Partners, LLC in its merger of Encampus Residencias de Estudiantes, S.L. and Siresa Campus Noroeste, S.L., into Siresa Campus, S.L.
  • Greystar acquires student accommodation portfolio in SpainJones Day advised Greystar Real Estate Partners, LLC in its joint venture with AXA Investment Managers - Real Assets, acting on behalf of its clients, and CBRE Global Investment Partners (CBRE GIP), also acting on behalf of its clients, in its acquisition of a portfolio of 37 student residences in Spain (33 operating and 4 under development) owned by Grupo RESA (Spain's market leader in student accommodation), from Azora, Arta Capital, Banca March, and Mutua Madrileña.
  • Goldman Sachs and Highgate Hotels acquires K+K Hotels GroupJones Day advised a consortium led by Goldman Sachs and Highgate Hotels, a leading hospitality investment and management company, in its acquisition, acquisition financing, and debt restructuring of the K+K Hotels group, which owns a portfolio of ten boutique hotels located in London, Paris, Barcelona, Munich, Vienna, Prague, Budapest, and Bucharest.
  • Additional Publications

    • 2018
      La figura de la especial complejidad, a debate

    Speaking Engagements

    • October 10, 2019
      A multi-jurisdictional approach to anti-corrupt enforcement, Jones Day
    • December 18, 2018
      Consideraciones importantes para investigaciones internas, Cintra
    • November 29, 2018
      Pruebas obtenidas en investigaciones a empleados: estado actual desde una perspectiva laboral, penal y protección de datos - Impacto de los nuevos derechos digitales
    • 28 noviembre, 2017
      Desayuno Gestión de Crisis
    • February 21, 2017
      Desayuno Actualidad Laboral: vigilancia de las empresas sobre los trabajadores
    • May 25, 2016
      Las multas a los directivos por infracción de la normativa de Competencia y Responsabilidad Penal