She specializes in corporate law and provides ongoing advice to boards of directors on compliance with their legal obligations and on matters relating to the performance of board secretary services, formation of companies and bylaw amendments.

She also has experience and participates in corporate governance matters, such as the design and drafting of good corporate governance rules (bylaws, board and shareholders' meeting regulations), the periodic review and adaptation of these rules to the latest requirements and recommendations, and preparation of reports and other documentation required or recommended in this area. In relation to the above, she provides legal assistance in the preparation of shareholders' meetings and provides support for the handling and resolution of matters of all kinds.

Her expertise also extends to the preparation, negotiation and draft of commercial contracts, the sale and purchase of companies, mergers and spin-offs, as well as corporate restructuring processes, in both domestic and international projects.

Since 2016 she has taught classes in corporate law as part of the Master's Degree for Access to the Legal Profession at Universidad Pública de Navarra.

Mar is a member of the Pamplona Bar Association.

Officially recognized LL.M. in International Transactions, Universidad Antonio de Nebrija in collaboration with Fordham School of Law and Centro de Estudios Garrigues.