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.

Senior Associate

Marije Van der Straaten

+31 621 940 157

[email protected]

Senior Associate

20+ years of working experience in project management of environment related and engineering projects.
Experienced in delivering environmental due diligence for hotel and residential sectors

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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Logistics and industrial Ridderkerk Panattoni

Project Management

Ridderkerk Distribution Centre, The Netherlands

39,819 sq m new-build warehouse and office building development.

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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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