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.

Karla Scott Castro

Senior Associate – Head of TDD Europe

Karla Scott Castro

  • Pan European Head of TDD
  • Over 15 years of experience in the real estate industry
  • Specialises in TDDs, Development Monitoring, and Reinstatement Cost Assessments across Europe.

Case Studies

Dutch and Spanish portfolio due diligence

Multidisciplinary services

Dutch and Spanish portfolio due diligence

A portfolio comprising two assets in The Netherlands and the other in Spain.

View
Map

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.

View

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.

Read story
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.

Read story
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.

Read story
“What motivates me most is working in an ambitious team - and that’s what I’ve found at Hollis. We’re always growing, evolving and aligning what we do to shape what clients truly need. Marketing is really about connection, and while digital tools energise me, it’s the real conversations and shared ambition that matter most. I value being part of a team that puts clients at the heart of everything we do.”