Europe Guide 2026 : Spain
Ranked Individual
Provided by Chambers
ONTIER is a robust domestic outfit regularly advising clients from a range of sectors including construction, energy and telecoms. The law firm draws strength from its large global network and regularly represents clients in arbitration mandates. It further retains experience in handling proceedings under ICC rules.
Provided by Chambers
ONTIER are always looking to innovate and their fees are competitive. They are doing a great job.
ONTIER are efficient, business-oriented and very dedicated.
ONTIER provides an exceptional service with almost immediate answers to any questions or queries raised by us.
ONTIER have great expertise in the Spanish market. The team are friendly, easy to work with and quick to grasp complex expert issues.
The service we receive from the firm is exceptional and their response times are fantastic.
Provided by Chambers
Mercedes Romero is praised by clients for her activity in the sphere of international arbitration. Representing international companies in the construction, energy and investment sectors, she is active in ICC arbitration proceedings and arbitration award enforcements.
She has great technical capabilities and a great human capacity with clients. She really understands their needs.
Mercedes Romero is an exceptional team leader.
Mercedes Romero is a great and highly prepared lawyer.
She displays a sharp grasp of the subject matter.
Mercedes is very hard-working and very valuable.
Arbitration
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