Reinoud Plantenga joined Necron Group in March 2026, bringing over 26 years of real estate experience. As development director, he is responsible for buy-and-build projects and the creation and progress of hospitality concepts.

Deals, development, and delivery

Reinoud holds a master’s degree in business administration from the University of Groningen and is a member of the RICS. He spent a significant part of his career working for German investment managers, which explains his fluency in German.

Track record

Career highlights include the acquisition of a 140,000 m² distribution centre in Bleiswijk, the development of around 900 hotel rooms across three Amsterdam hotels, and the forward funding acquisition of Edge Amsterdam West, delivered within the deadline, despite Covid-19. Some of that hotel work was done in close collaboration with Dirk Bakker, now CEO of Necron Hospitality Group.

Full calendar

Outside work, Reinoud can be found at the beach with his wife, two sons, and their dog, or on the golf course, padel court, or road bike. When he has a quiet moment, he reads about modern history or disappears into the kitchen. Not to do the dishes, but to prepare a proper meal.

Heiner Kropp supports Necron Group’s international expansion, especially the German market. As head of acquisition and project captain, he draws on roughly 40 years of real estate experience across Europe and Canada.

From brownfield to new ground

Heiner holds a master’s degree in industrial engineering from the University of Hamburg. His career has taken him through the full spectrum of real estate development, from concept and due diligence to construction, financing, and asset management. He has worked for developers, insurance companies, and international investors. Since 2000, he has been specialising in converting contaminated waterfront brownfields into new residential and commercial areas.

Built to last

What drives Heiner is the knowledge that the projects he works on will remain in operation for decades. That awareness sharpens his focus on environmental responsibility. He is personally involved in the development of biological soil remediation methods, resource-efficient building materials, and innovative approaches to reducing groundwater and ocean pollution. At Necron, that long-term thinking blends with the group’s commitment to sustainable development.

Wind in the sails

Outside work, Heiner spends his time with his wife, daughter, and their dog. He travels when he can, and sails whenever the wind allows, a passion he has held since childhood.

Bjørn Carlier is chief development officer at Necron Group. Throughout Europe, he oversees projects from the first grain of sand to realisation. “My job consists of bringing people together.”

From paper to property

Bjørn began his career at a paper mill, for which he travelled across Asia, South America, and Australia to find building land for new factories. In 2016, Bjørn met Gerard van Liempt and together they developed land in Rumlang, Switzerland. That collaboration proved a success, and the starting point of Necron Group.

Accelerator Method

Bjørn describes Necron’s strength as reliability, precision, and speed. “We start somewhere in an area or with a specific tenant and keep expanding that collaboration further.” Since 2024, the group has shifted further towards end investment, using its Accelerator Method to acquire projects where permits and leasing are already arranged.

A fixer for life

“I consider my job a lifestyle,” Bjørn admits. Since the age of fourteen, he has been spotting opportunities and connecting people. Looking ahead, he wants to give back to people who are less fortunate. “While traveling in Asia, I started thinking about supporting a small school in Thailand and arranging internship placements for hotel school students from Myanmar. After all, I remain a fixer.”

Mr. Michele Janner M.Sc. is a qualified civil engineer from Delft University and graduated cum laude in 1995. He has extensive experience in real estate construction and real estate asset management.

Martin Jäger has more than 30 years of experience in the national and international investment and real estate sector.

Mr. Benno Heer is a Swiss citizen and studied media communications, economics and politics in Zurich, Florence and London. He has more than 20 years of management experience in international media, telecommunications, and finance companies.

Melanie Römer-Moolman is development director at Necron Group, responsible for the expansion of light industrial and logistics developments in the Netherlands and Germany.

From Cologne to the construction site

Melanie holds a technical foundation from TU Darmstadt and TU Delft, combined with a postgraduate qualification in real estate investment management from European Business School (EBS), accredited by RICS. She began her career at BEOS AG (Swiss Life Asset Managers) in Cologne, where she developed a thorough understanding of tenants’ needs and built expertise in financial modelling and commercial negotiations. At Panattoni, hard hats and safety boots became part of her daily outfit as she led the development of large-scale logistics projects across the Netherlands. Her broader experience also includes mixed-use and leisure developments in Belgium and France.

Bridging cultures

Having lived and worked in Germany, France, Belgium, and the Netherlands, Melanie bridges cultures, disciplines, and stakeholders with ease. What drew her to Necron was its entrepreneurial spirit, international ambition, and commitment to setting new standards in sustainable development. That imagination, seeing opportunity across borders and sectors, is something she shares.

Off site

Outside work, Melanie spends her time with family and friends, travelling, and staying active through sports.