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

Diana Catalina Caballero Aguirre is the Managing Partner and founder of Martínez Caballero Abogados, a leading law firm in Barcelona. With a strong academic background and a career focused on providing comprehensive legal solutions, Diana combines her expertise in immigration law, administrative law, and commercial law to effectively defend the interests of individuals and businesses. Her approach—personal, strategic, and client-focused—has made her a trusted attorney throughout Spain.

Education and Professional Experience

Legal Education

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

Professional Memberships and Qualifications

A member of the Barcelona Bar Association since 2016.
A licensed administrative manager with the Official Association of Administrative Managers of Catalonia since 2020.

Professional Experience

Diana has built her professional career in the field of law from a multidisciplinary perspective, advising both individuals and companies on complex legal proceedings. She has served as an external legal advisor to 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 law in Catalonia and the rest of Spain, but also works with international clients, assisting those who wish to legally settle in the country or resolve cross-border issues. Her bicultural perspective, as a professional who has experienced migration firsthand, brings a unique viewpoint to the firm and its clients.

As CEO and founding partner of Martínez Caballero Abogados, she leads the firm’s growth, team building, and strategic communication—as highlighted by the local press in its coverage of the firm.

Awards and Professional Activities

Invited as a speaker at talks and workshops on citizenship and immigration.
Active presence on professional social media platforms (LinkedIn, Instagram), sharing analysis on immigration, law, and entrepreneurship.
A prominent figure in the media for his human-centered approach to modern law.

Areas of Expertise

Immigration Law and Spanish Citizenship

Diana has extensive experience advising individuals and families on procedures related to residence permits, citizenship, renewals, ties to the country, and administrative appeals. Her practical approach, which is attentive to the needs of migrants, leads to efficient and humane outcomes.

Administrative Law

An expert in proceedings before public authorities, resource management, licensing, penalties, and all types of administrative actions. Her knowledge of local regulations and practices in Barcelona is a strategic advantage for clients.

Commercial Law

She advises companies and entrepreneurs on contracts, business relationships, and corporate matters, combining legal rigor with business acumen 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 consistent communication with the client
Commitment to Justice and Equity
Comprehensive support throughout long and complex processes

This approach has made his practice one of the most highly regarded in the field of immigration and administrative law in Barcelona.

Contact Diana Caballero

If your case involves immigration, Spanish citizenship, 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

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Real Customer Reviews

      EXCELENTE  
   A base de 888 reseñas 
    
 
 
 
   
 
 
       Publicado en Google  
   
   Carlos Ramirez Marquez 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Realizar mis trámites de residencia con Martínez Caballero Abogados fue la mejor decisión, muchas gracias a Loren, Dania, Carmen y todo su equipo, excelente atención y resultados
  
 
      Publicado en Google  
   
   Alexander Liberato 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Mi experiencia con el despacho ha sido, en general, positiva. Contraté sus servicios para el acompañamiento y gestión de un proceso de regularización en España, que hasta el momento ha tenido una evolución favorable y continúa en proceso.

Destacaría especialmente el trato cordial y la disposición del equipo, así como la efectividad en la gestión y el acompañamiento durante el procedimiento.

En general, estoy satisfecho/a con el servicio recibido y, sobre todo, con la evolución positiva de mi proceso.
  
 
      Publicado en Google  
   
   Fredy Samboni 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Los abogados Martínez y Caballero son muy eficientes,han llevado mis trámites de regularización desde mi inicio hasta ahora que e obtenido mi nacionalidad,les agradezco mucho por su acompañamiento y compromiso.
  
 
      Publicado en Google  
   
   Marisol Corporan santana 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Excelentes profesionales,con ellos los procesos realizados son claros y precisos,no los cambio por nadie,he realizado un proceso que ya había intentado en otras ocasiones y el resultado fue fallido pero en con este equipo de trabajo he sido atendida por Dania y Sheyla y he obtenido resultados satisfactorios,siempre atentas y cordiales y sobre todo la información necesaria para obtener los mejores resultados.
  
 
      Publicado en Google  
   
   Danilo Raigoza 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Recibí una excelente asesoría de Sandra, y quedé muy satisfecho con el trabajo realizado.  Muchas gracias !!!
  
 
      Publicado en Google  
   
   Jhon Llanos 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. Excelentes
  
 
      Publicado en Google  
   
   Lela Akiashvili 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. I cannot recommend this law firm highly enough. Jose María Martínez approached my case with extraordinary dedication, professionalism and attention to detail.

His expertise was matched by genuine care and dedication.

If you are looking for a trustworthy, dedicated and highly professional lawyer, I wholeheartedly recommend them. I will definitely continue all my business with them.
  
 
      Publicado en Google  
   
   Amaro 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. La consulta con Iván Álvarez Sáez fue muy atenciosa, me lo explicó con paciencia y de forma clara y objetiva todo que necesitabas saber. Además escucho todas mi dudas y las contesto de manera gentil y simples, de manera que esté a mi alcance comprender cosas más complejas del derecho. Estuve muy contento con su servicio e profecionalismo.
  
 
      Publicado en Google  
   
   Karen Andreina Rico Mena 
 
 
 
 Trustindex verifica que la fuente original de la reseña sea Google. La mejor experiencia con Martínez caballeros se apersonan mucho con cada expediente les recomendarías 100%
  
 
  
  
 
     Verificado por: Trustindex  La insignia verificada de Trustindex es el símbolo universal de confianza. Solo las mejores empresas pueden obtener la insignia verificada si tienen una puntuación de revisión superior a 4.5, basada en las reseñas de clientes de los últimos 12 meses. Leer más

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