Who We Are

We were founded in 2008 by Dutchman Ernst ter Meulen and Englishman Simon Hartnell.

Over the years we have been working with talented individuals who share our passion for business and bring further knowledge, expertise (and some quirky hobbies!) to the business. The result is a strong and aligned team who all hold the same values and vision.

That vision is to build something of value and longevity. And to that end, we pursue every deal with the same single-minded determination we show when pursuing our other passions in life, from piloting a hot air balloon to endurance cycling. That 100% commitment is what enabled us to see early on how the emerging technology and data industries would impact the real estate business, and to take the lead in real estate advisory in data centers.

In just ten years, the business has developed a reputation for expansive industry knowledge and tenacious deal-making. We have done that by helping predominantly UK-based investment managers, along with overseas capital, to secure real estate and data center assets in the UK and mainland Europe.

Our clients have included some of the biggest names in the industry.

  • Ernst ter Meulen

    DATA CENTERS & REAL ESTATE

    Ernst loves the outdoors. He is a skilled sailor, keen tennis player and a fervent skier.

    Ernst is responsible for the growth and strategic direction of AC Niellsen, as well as looking after some of the company’s more significant projects.

    He lived and worked in the US for more than a decade before returning to the Netherlands in the late 1980s and starting a residential estate agency, later moving into property investment advisory and investing on his own account in retail, logistics and office investments.

    As an entrepreneur at heart, Ernst is always full of ideas and determined to close every deal. He believes that keeping things simple and never giving up is the secret to building long lasting relationships and managing successful investments.

    Get in touch with Ernst:
    M. +31 (0) 6 53 15 20 30
    O. +44 (0) 20 7129 1187
    E. etermeulen@ac-niellsen.com

  • Junior Volmer

    REAL ESTATE & DATA CENTERS

    Rudi Jr., widely known as Junior, spent over three years on the road as a successful DJ, captivating thousands of revellers across Europe.

    Transitioning to real estate, he acquired extensive expertise in commercial properties by managing a portfolio for a private Dutch investor. Currently, Junior collaborates with Ernst on all datacenter transactions and provides advisory services for commercial real estate development.

    In his free time, Junior enjoys DJ'ing, cooking, or relaxing with friends on one of the many great terraces along the Amsterdam canals.

    Get in touch with Junior:
    M. +31 (0) 6 29 36 69 39‬
    O. +31 (0) 20 215 40 54
    E. Jvolmer@ac-niellsen.com

  • Frank de Frémery

    DATA CENTERS

    Frank is not a man who enjoys sitting still. When he’s not exploring remote areas of the world with his family, he’s playing various sports including tennis, running, skiing and kickboxing.

    He began his career at AT&T-Unisource before moving to Global Crossing in the USA, then to Linxtelecom in Eastern Europe. He later drew on his hard-earned experience in data centers and telecoms to set up his own consultancy firm. Then, having overseen the building of a Tier-4 data center facility in Curaçao in the Dutch Caribbean, he returned to the Netherlands to head up AC Niellsen Data Centers.

    Frank is results-driven leader whose extensive knowledge of data centres and telecom is enhanced by his international experience and outlook. A side-benefit of this work is his encyclopaedic knowledge of international dialling codes!

    Get in touch with Frank:
    M. +31 (0) 6 51 48 11 23
    O. +31 (0) 20 215 40 54
    E. fdefremery@acn-dc.com