Diana Caballero Aguirre | Lawyer in Barcelona and Madrid specializing in Immigration, Administrative, and Commercial Law

Diana Catalina Caballero Aguirre is Managing Partner and founder of Martínez & Caballero Abogados, a leading law firm in Barcelona. With solid academic training and a professional career focused on providing comprehensive legal solutions, Diana combines her experience in immigration law, administrative law and commercial law to effectively defend the interests of individuals and businesses. Her approachable, strategic and client-oriented approach makes her a trusted lawyer throughout Spain.

Education and Professional Career

Legal Education

Law Degree.
Master’s Degree in Law (prestigious program at Business and Management School).

Memberships and Qualifications

Member of the Barcelona Bar Association since 2016.
Administrative Manager registered with the Official College of Administrative Managers of Catalonia since 2020.

Professional Experience

Diana has developed her professional career in the field of law from a multidisciplinary perspective, advising both individuals and companies in complex proceedings. She has collaborated as external legal advisor at the Consulate General of Brazil in Barcelona and has actively participated in training and legal outreach initiatives.

International experience and leadership

Diana not only practices professionally in Catalonia and the rest of Spain, but also works with international clients, supporting those who wish to establish themselves legally in the country or resolve transnational matters. Her bicultural vision, as a professional who experienced migration firsthand, brings a unique perspective to the firm and its clients.

As CEO and founding partner of Martínez & Caballero Abogados, she leads the firm’s development, team training and strategic communication, as highlighted by local press coverage of the firm.

Recognitions and Professional Activities

Guest speaker at talks and workshops on nationality and immigration.
Active presence on professional networks (LinkedIn, Instagram) sharing analysis on immigration, law and entrepreneurship.
Prominent figure in the media for her human approach to modern legal practice.

Areas of Specialization

Immigration Law and Spanish Nationality

Diana has extensive experience advising individuals and families on residence permits, nationality, renewals, settlement procedures and administrative appeals. Her practical approach, attentive to the needs of migrants, facilitates efficient and humane results.

Administrative Law

Expert in proceedings before public administration, management of appeals, licenses, sanctions and all types of administrative acts. Her knowledge of local regulation and practice in Barcelona is a strategic advantage for clients.

Commercial Law

She advises companies and entrepreneurs on contracts, commercial relationships and corporate matters, combining legal rigor with business vision to protect economic and commercial interests.

Work Approach and Professional Values

Diana combines legal excellence with personalized attention, focusing on:

Legal strategies tailored to each case
Clear and constant communication with the client
Commitment to justice and equity
Comprehensive support in long and complex processes

This approach has made her practice one of the most valued in the field of immigration and administrative law in Barcelona.

Contact Diana Caballero

If your case is related to immigration, Spanish nationality, administrative proceedings or commercial matters, you can contact Diana directly for a specialized assessment of your situation.

Phone: +34 628 379 016
Email: info@martinezcaballeroabogados.com

Contact us now

WEB PRIVACY POLICY SUMMARY CLAUSE

Data Controller: APNA ADVOCATS, S.L.P., with CIF B67183491, whose registered office is located at Plaza Tetuán, nº 40-41, 1st Floor – Office 1, CP 08010 Barcelona – Spain

Purpose of Processing: To respond to user information requests through the website. To manage the booking of appointments through the channels established on the website, from an attendance control, administrative, and billing perspective. In the event of contracting any of the legal, accounting, or any other type of services provided by the company, the purpose may also be to manage and monitor the provision of said service. To manage social networks. The Owner has a presence on social networks. If you become a follower on the Owner’s social networks, the processing of personal data will be governed by this section, as well as by those conditions of use, privacy policies, and access regulations belonging to the social network that applies in each case and which you have previously accepted.

Commercial communications: We will only send you commercial communications, provided they are of interest to you, with your prior authorization, which you can provide via the corresponding box established for this purpose. If you are a client of the firm, we may send you such communications based on Article 21 of the LSSCIE, but you can always request to unsubscribe and stop receiving these mailings.

Legal basis for processing: The consent of the data subject obtained through the acceptance of the corresponding box.

Data protection rights: You can exercise your rights of access, rectification, objection, erasure, restriction of processing, and portability at the email info@martinezcaballero.com or that of our Data Protection Officer: equaldpo@equalprotecciondedatos.com. If you believe your request has not been properly addressed, you may file a complaint with the Spanish Data Protection Agency (AEPD) https://www.aepd.es/en.

Additional information

More information at: Privacy Policy.

Diana Catalina Caballero Aguirre – Lawyer in Barcelona | Expert in Immigration and Administrative Law