John Gustafson

John R. Gustafson


+34 91 561 51 01



John began his professional career in the Public Defender’s Office in Albany, New York and later joined Baker & McKenzie’s Madrid office (1991). Since 1994 he has been working in Rivero & Gustafson in the sphere of private law, both civil and commercial, representing a wide range of clients and companies in the fields of contracting, strategic merger and acquisition transactions and joint ventures:

  • Acting as company secretary.
  • Pharmaceutical and health law.
  • Commercial distribution and agency law.
  • New technologies.
  • Licensing rights.
  • Unfair competition.

In addition, John conducts contentious proceedings of a civil and commercial nature before the ordinary courts and institutional and ad hoc arbitral proceedings at both the strictly national and international levels, in matters of commercial contracts, enforcement actions and compensation:

  • Bankruptcy law.
  • Corporate law, directors’ liability, challenging company agreements, separation actions and defending minority shareholders.
  • Financial criminal law.


John holds a Law Degree from Universidad CEU San Pablo/Complutense University of Madrid (1988). He obtained a PhD in Commercial Law from the Universidad Autónoma of Madrid (2005).


John works in Spanish and English. He has been a lecturer on International Contracting at Instituto de Empresa for its Master of International Practice LLM program.

John is ranked in the Chambers Europe and Global guides in Dispute Resolution – Spain. Moreover, he is listed in the Best Lawyers legal directory for Spain in the categories of Arbitration & Mediation, Litigation, Banking & Finance Law.