About us.

GEM was founded by Willem Slager. His story in real estate began at the age of nineteen when he took on his first job as a real estate agent. It wasn’t long before Willem transitioned into logistics real estate.

In a period of twenty-five years, Willem developed his business and commercial skills, advanced to a director position, and ultimately led one of the Netherlands’ largest logistics real estate development companies for many years. Today, his extensive and profound knowledge, together with his strong commercial mindset and drive for innovation, makes him a recognized leader in logistic real estate investments.  

Willem has developed more than 1.5 million square meters and was involved in over € 2 billion worth of logistic real estate projects. With his experienced team, he creates inspiring perspectives on developing logistics real estate.

By daring to create new standards, we are paving the way to a brighter tomorrow.”

our vision

Experience. Power. Impact.

GEM is fully dedicated to logistics real estate. Nothing more, nothing less. With over twenty years experience, we know the business inside out. We leave no question unanswered. And we have outstanding in-depth knowledge of what needs to be done to convincingly drive developments and investments that create impact.

Pragmatic. Straightforward. Effective.

GEM values clarity for all stakeholders. We operate in the same way as we communicate: clearly, directly, and transparently. And we are always pragmatic. When opportunities arise, they are seized. And when a solution is needed, a solution is found.

Creating new standards.

GEM creates a new paradigm in the interplay between sustainability, building intelligence, and utility value. ESG optimizations are a must, alongside the need for control and insight into investment performance. We deliver significant added value by integrating innovative methods for energy performance analysis and reporting. Data analysis, digital monitoring, and AI optimization are employed for real-time management of real estate usage.