Our people

All together different — We're independent, multi-disciplinary real estate technical experts, project managers, and sustainability consultants. We understand how buildings work and how they perform. Meet our team.

Associate, ESG & Sustainability

Suzi Warren

+31 207 946 187

[email protected]

Associate, ESG & Sustainability

Senior ESG Consultant with more than 15 years’ experience
Expert in sustainable buildings, with a specialism in health and well‑being in the built environment
Experienced in ESG design reviews to enhance employee well‑being and reduce environmental impact.

Case Studies

Cost Management

The Student Hotel in The Netherlands

Managing the cost of purpose-built student accommodation developments across Europe.

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Project Management and Cost Management

Karl Lagerfeld HQ in Amsterdam, The Netherlands

Relocation of the eponymous fashion brand.

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News & Insights

News 10 DEC 2025

Hollis Highlights 2025

2025 has been an incredible year at Hollis, packed with achievements, growth and milestones we’re proud of.

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News 04 SEP 2025

Q+A: Hollis CEO sets out European blueprint

In a recent interview with Green Street News, Andy Hay, CEO, shared our vision for the next chapter of our journey in continental Europe.

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Insights 04 MAY 2025

Looking to Europe in the face of global uncertainty: Andy Hay explains Hollis’s plans for growth

Andy Hay, our CEO, shares his journey, the unique perspective he brings to Hollis, and how we’re expanding across Europe.

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