Loyens & Loeff

Testimonials

Collated independently by Legal 500 research team.

• Loyens' internal investigations and compliance practice stands out for its seamless integration of top-tier legal, tax, and regulatory expertise with true cross-border execution. The team combines the discipline and independence demanded by high-stakes investigations with a pragmatic, solutions-oriented mindset that anticipates enforcement expectations in multiple jurisdictions. Their ability to coordinate complex fact-finding, privilege-sensitive analysis, and remediation planning across the Netherlands, the EU, and beyond—while maintaining consistent quality and pace—is genuinely distinctive. Marleen Velthuis. Marleen led with exceptional professionalism and composure, combining deep knowledge of the Dutch and EU legal framework with sharp, pragmatic judgment. She managed a sensitive client relationship in a highly complex compliance context with transparency and steadiness, set clear expectations, and maintained credibility with senior stakeholders throughout. Marleen balanced independence and collaboration effectively, ensured board-ready communication, and guided the team to defensible, practical outcomes while consistently showing empathy for the people involved. Jurriaan Klaasen. Jurriaan distinguished himself through meticulous preparation, rigorous analysis, and calm execution under pressure. He translated complex legal and regulatory issues into clear, actionable steps for the workstreams, and he managed interactions with client stakeholders with tact and empathy. His drafting was concise and decision-oriented, his coordination across disciplines was seamless, and he demonstrated an unwavering commitment to quality and discretion in a sensitive compliance matter.
• The individuals we worked with at Loyens distinguished themselves through deep mastery of the Dutch and EU legal frameworks and an uncommonly steady hand in navigating the sensitivities inherent to complex compliance matters. At the partner level, they combined technical precision with sound judgment, ensuring that each strategic decision was calibrated to regulatory expectations, privilege considerations, and board-level governance. Their client management was exemplary: they were measured and transparent in their communications, set realistic expectations, and maintained credibility with senior stakeholders even under intense time pressure. This balance of legal rigor, independence, and practical problem-solving made a material difference to the outcome of the work.
• ‘Marleen Velthuis is a great lawyer and easy to work with.’
• ‘Good advisory and litigation practice for white collar crime.’
• ‘Marleen Velthuis is experienced and very involved with her clients and cases, bold and can make hard decisions where necessary.’
• ‘They have specialist expertise within the field of corporate criminal law, more specifically environmental criminal law.’
• ‘Marleen Velthuis is always happy to discuss and assist. She is pragmatic, enthusiastic and has specialist expertise within the field of corporate criminal law.’
• ‘It is an energetic young dedicated team that is well established in the larger Loyens & Loeff organisation.’
• ‘Marleen Velthuis is a very enthusiastic, energetic, hands on lawyer. Easy to work with and is very dedicated to her clients.’

Key clients

• Rabobank Vastgoed
• Bakker

Work highlights

Lawyers

Next Generation Partners

Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Marleen Velthuis

Comparative Guides