Hollis conference people in a room

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.

Constanza Fabris

Engineer

Constanza Fabris

  • MEP Project Engineer based in Madrid
  • Engineering degree with MSc in renewable energy and sustainability
  • Strong expertise in mechanical design and project planning
  • Delivers innovative and environmentally friendly solutions
  • Experience in hotels, commercial, and residential projects.

Case Studies

Los Cubos, Calle Albacete in Madrid, Spain

Development Monitoring

Los Cubos, Calle Albacete in Madrid, Spain

We were engaged by the funder to act as the project development monitor for a 18,324 sqm office refurbishment. 

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Programme Management

Blackstone's PROXITY portfolio, Europe

We have been appointed by Revantage to provide a client-side PMO service for Blackstone’s new PROXITY vehicle, a newly acquired portfolio comprising over 500 industrial and logistics assets across 12 European countries.

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News & Insights

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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News 13 NOV 2025

Festive Feet, Planet-Friendly Threads, and a Cause That Matters

At Hollis, people have always been at the heart of everything we do – our clients, our colleagues, our partners, and our communities.

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News 23 OCT 2025

Thrive in Construction Podcast: Comfort is Killing Progress ft. Andy Hay

Andy Hay joined the Thrive in Construction podcast, sharing why clarity, capability and courage - not comfort - drive progress in a fast-changing world.

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