Mr Borja Sainz de Aja > Uría Menéndez > Madrid, Spain > Lawyer Profile

Uría Menéndez
28002 MADRID

Work Department

Litigation and Unfair Competition.


Borja Sainz de Aja joined Uría Menéndez in 1999 and headed its office in Lima from November 2002 until September 2004. He specialises in Intellectual Property, distribution, unfair competition, advertising, data protection law and litigation relating to these areas of law.

He regularly advises engineering and technology multinationals and other companies in sectors such as electronics, microelectronics, software, food, beverages, tobacco, textiles and education on the negotiation, drafting and structure of contracts and transactions. Borja also represents these clients before regulatory bodies and courts in proceedings on the protection of patents, trademarks, industrial designs, copyright, know-how and other intellectual property rights.

Moreover, Borja advises market leaders in the telecommunications, electronics, financial services and food and drinks sectors in litigation and non-litigation matters regarding unfair competition and advertising issues, including passing-off, gaining unfair advantage from the reputation of others, misleading practices, sales below cost, protection of trade secrets, misappropriation of trademarks and getting ups.

His expertise includes advising on commercial law issues, including corporate matters and collaboration contracts. He specialises in drafting distribution, software and internet related contracts. Borja has been involved in the drafting of the corporate aspects and standard conditions of leading Spanish on-line service providers.

Borja has extensive experience on personal data protection and advises multinational and domestic clients from all sectors on the design, regularisation and processing of their databases and information systems.


English; French; Italian.


Madrid Bar Association; Spanish Group of the International Association for the Protection of Intellectual Property; Lex Mundi – contact for Spain; Spanish Association for the Defence of Competition (Unfair Competition Section).


Law Degree, Universidad de Navarra, 1998, summa cum laude.

Lawyer Rankings

Spain > Industry focus: Retail

Uría Menéndez is valued by clients for its ‘in-depth knowledge of regulations’, and for its ‘dedication and passion’, which translates into ‘creative advice’. The firm stands out for its multidisciplinary expertise in a variety of business sectors, and the retail practice works particularly closely with the food and beverage sub-group. Borja Sainz de Aja, Patricia Vidal and Ramiro Rivera head the well-rounded team, which operates from Madrid and Barcelona, regularly advising a wide range of distributors, producers and retailers from the consumer goods, fashion, food, toys and jewellery sectors.

Spain > Industry focus: TMT

The TMT practice at Uría Menéndez, forming part of the firm’s well-established digital law group, is highlighted for its ‘technical quality’, and has notable skills in a range of areas, including cybersecurity, IT, AI, big data and fintech. A renowned expert in the market, Pablo González-Espejo heads the department, closely supported by the ‘exceptionalLeticia López-Lapuente, who garners praise for her ‘technical knowledge in IT’ and ‘ability to negotiate and find solutions and to coordinate complex projects’. Skilled litigator Borja Sainz de Aja and senior associate Reyes Bermejo Bosch, who focuses her practice on data protection, e-commerce and information technology, bring additional expertise to the team.