César Gil de Biedma Zulueta
César Gil de Biedma Zulueta is a highly distinguished Spanish lawyer with more than 30 years of experience in Corporate Law, Mergers & Acquisitions, Banking & Financial Markets, Insurance, Real Estate, and Civil/Commercial Litigation. He holds a Law Degree from the Complutense University of Madrid, one of Spain’s leading institutions.
César spent two decades at Ontier (formerly Bufete Ramón Hermosilla), one of Spain’s premier international law firms, where he joined in 1993 and rose to become Partner responsible for the Department of Commercial Law. In this capacity, he advised major national and international clients, including numerous companies listed on the IBEX 35, Spain’s principal stock market index.
Known for his depth of legal analysis, commercial pragmatism, and ability to navigate high‑value transactions, César has acted as Non‑Director Secretary and Legal Adviser to companies across multiple sectors including real estate, telecommunications, finance, and industrial operations. His strategic guidance has supported boards and executive teams through complex corporate governance issues, major investments, restructurings, and high-profile disputes.
In addition to his practice, César has contributed significantly to legal education as a professor of Corporate Practice at the Federico de Castro School of Law and Universidad Pontificia Comillas (ICADE), institutions recognised for shaping Spain’s next generation of commercial lawyers. His teaching work reflects his commitment to promoting excellence, ethical practice, and technical rigour within the profession.
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Corporate Law Advising boards, management teams, and shareholders on corporate governance, commercial structures, executive responsibility, and regulatory frameworks.
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Aviation Law Dealing with Mass EU 261 Claims
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Mergers & Acquisitions Leading domestic and cross‑border M&A transactions, joint ventures, restructuring operations, and strategic acquisitions for major corporations.
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Banking & Stock Market Law Advising financial institutions and listed companies on securities regulation, capital markets, financing structures, and compliance with Spanish and EU regulations.
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Insurance & Financial Services Experience in regulatory, contractual, and contentious matters involving insurance companies and financial entities.
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Real Estate Law Advising on major real estate investments, commercial property transactions, and sector‑specific structuring for developers and investors.
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Civil & Commercial Litigation Representing clients in high‑stakes litigation before Spanish courts in matters involving commercial contracts, corporate disputes, liability, and financial claims.
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Corporate Advisory Roles Serving as Non‑Director Secretary and legal adviser to companies in highly regulated and operationally complex sectors.
Leadership & Career Highlights
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Partner and Head of Commercial Law, Ontier (formerly Bufete Ramón Hermosilla)
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Advised multiple IBEX 35 companies on corporate, commercial, and financial matters
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Strategic adviser to major Spanish and international corporations
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Served as Non‑Director Secretary of companies in the real estate and telecommunications sectors
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Played a central role in major M&A transactions, corporate restructurings, and financial operations
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Represented clients in significant commercial litigation and arbitration proceedings
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Recognised for combining technical excellence with a practical, solution‑focused approach
Academic & Teaching Contributions
César has held teaching positions at leading Spanish institutions, including:
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Federico de Castro School of Law – Professor of Corporate Practice
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Universidad Pontificia Comillas (ICADE) – Lecturer in Corporate Law
His academic work reflects a commitment to professional development and the dissemination of advanced corporate governance and commercial law principles.
Approach
César is known for:
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Strategic, commercially aligned legal advice
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Rigorous analysis and technical precision
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Strong understanding of corporate governance and board dynamics
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Clear, effective communication with senior stakeholders
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Deep experience across the financial, corporate, and real estate sectors
Clients value his ability to manage complex, high‑value matters with confidence, authority, and practical insight.
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Fluent in English and Spanish native
Areas of Expertise
- Aviation Law
- Corporate Law
- Mergers & Acquisitions
- Banking & Stock Market Law
- Insurance Law
- Real Estate
- Civil & Commercial Litigation
- Corporate Governance
- Regulatory Compliance
- Board Advisory Roles
Education & Memberships
- Degree in Law, Complutense University of Madrid
- Former Partner & Head of Commercial Law, Ontier / Bufete Ramón Hermosilla
- Senior Adviser to listed and multinational companies
- Experienced professor of Corporate Practice at top Spanish institutions