Olivier Rens

Cassiopeia provides investment services. The company is headquartered in Mechelen, Belgium.

Willemen Groep NV provides civil engineering and construction services. It offers residential, civil engineering, road, industrial, renovation, public private partnerships, DBFM projects, and commercial construction services. The company was founded in June 1999 by Pierre-François Van Poppel and is headquartered in Mechelen, Belgium.

Willemen General Contractor NV provides road construction services. It is a general contractor for all types of buildings: mixed projects, offices, residential buildings and general non-residential buildings. The firm’s main activity is the construction of fully-finished new buildings and renovation projects. The company is headquartered in Mechelen, Belgium.

Part of Cassiopeia NV, Willemen Finance is a construction group that offers a wide range of building activities, including civil projects, industrial construction, residential and utility projects, as well as road and airport construction. The company is based in Mechelen, Belgium. Willemen Construct built 250 holiday villas, a swimming pool, supermarket, and catering facilities, while Willemen Infra was responsible for the sewerage, roads, utilities, and rivers that connect the houses to the lake and central facilities. The Belgian company also participates financially in projects and has the necessary network and knowledge to attract foreign investment. The company's role is mainly steering, optimizing, and critically determining the entire construction project during its entire life cycle. The company was founded in 2006, and the CEOs are Johannes Willemen and Tom Willemen.

Kumpen NV provides building and construction services. It also offers infrastructure solutions focusing on roads and drainage. The company was founded by Constant Kumpen in 1945 and is headquartered in Hasselt, Belgium.

Part of Cassiopeia NV, Albitum NV is a roofing company based in Kontich, Belgium. Albitum's teams depart from Kontich and Ardooie, and the company believes in long-term relationships with its employees and clients. Albitum has been sealing roofs for fifty years and invests in research to develop better and newer methods. The Belgian company works independently of suppliers and materials and offers waterproof quotations with no small print or unforeseen circumstances. The CEOs are Tom Willemen and Johannes Willemen. The company was founded in 1997 and is dedicated to providing sustainable solutions for various roof systems, including bituminous, PVC, EPDM, TPO, and liquid seals.

Association des Entrepreneurs Belges de Grands Travaux, also known as ADEB-VBA, is a Belgian association that aims to improve practices in the construction sector. The association provides a standard list of tasks and responsibilities for construction projects that can be completed by the various parties involved in the design, permit requests, and execution of construction projects. The non-profit company is based in Brussels, Belgium. The organization has been in existence since 1936 and has evolved over the years to become an indispensable part of the construction industry in Belgium. ADEB-VBA promotes better collaboration and clear commitments among all stakeholders involved in the construction process. ADEB-VBA takes many initiatives to support construction entrepreneurs in Belgium and helps them to fully enjoy their profession.

Willemen Infra is a construction group that offers a wide range of building activities, including civil projects, industrial construction, residential and utility projects, and road and airport construction. The private company is based in Ghent, Belgium. The Belgian company follows the lean philosophy to eliminate waste and improve project quality and customer value. Willemen Real Estate, a subsidiary of the company, develops and executes energy-efficient and high-quality apartment buildings, PPS and mixed-use projects, student and service flats, and other residential projects across Belgium. The company's customer-oriented approach and collaboration with real estate agents are the keys to its success. The company was founded in 1949, and Tom Willemen has been the CEO of the company since 2021.

Part of Entreprise Générale Léon Grosse SA, Willemen Project Finance NV is a construction company based in Mechelen, Belgium. The Belgian company offers total solutions for construction or renovation projects, from design to build phase and from financing to maintenance. Willemen Project Finance is the knowledge center for project financing within the Willemen Groep, providing support for financing, strategy, and management of complex competitive tenders. The team distinguishes itself from the market with innovative financing solutions tailored to the project. During project management, they act as shareholders and managers of the project company, remaining involved from the tender to the end of the contract. Willemen Real Estate, a subsidiary of Willemen Groep, designs and builds high-quality, energy-efficient apartment buildings and residential complexes throughout Belgium. The company was founded in 1991 and is led by CEOs Johannes Willemen and Tom Willemen.

Willemen Construct NV is a Belgian construction company that combines the experience of an established value with the dynamics of a young company. The private company is based in Mechelen, Belgium. Willemen Project Finance is the knowledge center for project financing within the Willemen Group, providing support to all companies within the group for financing, strategy, and management of complex tendering processes. The CEOs are Tom Willemen, Johannes Willemen, and Marc Jonckheere. The company was founded in 2018 as a result of a merger between Willemen General Contractor and the building department of Kumpen.

Willemen Grondbank NV provides financial services. The private company is based in Mechelen, Belgium. The Belgian company was founded in 2014. Tom Willemen has been the CEO of the company since 2014.

Sion Netezicht NV is a Belgian company that manages and develops residential real estate and trades its own real estate. The private company was founded in 2012 and is based in Hasselt, Belgium.

Sanitechniek NV is a Belgian company that was founded in 1987 as an expansion of Sanitechniek PVBA's activities. The private company is based in Belgium. The company became a part of the Willemen Group in 1999, which is the largest family-owned construction company in Belgium. Sanitechniek has a team of 50 motivated employees. The CEOs of the company are Johan Willemen and Tom Willemen.

Belgian Construction Certification Association Vzw, founded in 1992, is an independent, impartial, and expert organization based in Diegem, Belgium. The Belgian company works to monitor and strengthen the quality, reliability, and performance in construction. The non-profit company provides quality declarations to give certainty about the quality, agreement with regulations, or suitability of a building product, construction company, or service provider. BCCA assesses and certifies products, services, craftsmanship, and organizational systems for manufacturers, construction companies, installers, and service providers. The company works as a platform for policymakers, professional associations, and other stakeholders to help in active and transparent consultation of the criteria for the certification of products and services. BCCA also provides technical approval and assessment, and their certificates are arranged per family (group of products, people, or processes) and certification system.

Ascovil SA is a Belgian company that was founded in 2014. The private company's description is "welcome to mobilmat Welkom bij Mobilmat".

Part of Entreprise Générale Léon Grosse SA, Willemen Global NV is a Belgian company that provides waterproofing work services and engages in trading real estate properties. The company is based in Mechelen, Belgium. The CEOs are Johannes Willemen and Tom Willemen. The company was founded in 1992.

Vandamme - Madoe NV provides transportation services for goods. The private company is based in Brugge, Belgium. The CEOs of the Belgian company are Tom Willemen, Marc Jonckheere.

Compagnie Belliard Froissart NV constructs residential buildings. The private company is based in Mechelen, Belgium. The CEOs are Tom Willemen, Johannes Willemen. The Belgian company was founded in 2007.