Hendrik de Haan

TBI Holdings BV operates as a financial holding company with activities in the engineering, construction and development, and infrastructure industries. Its subsidiaries include Comfort Partners, Croon Elektrotechniek, Eekels Technology, Era Contour, Groothuis Wonen, Hazenberg Bouw, Hevo, J.P. van Eesteren, Koopmans Bouwgroep, MDB, Mobilis, Nico de Bont, Synchroon, Timmermans Infratechniek, Voorbij Funderingstechniek, Voorbij Prefab, Wolter and Dros, and WTH Vloerverwarming. The company was founded in 1981 and is headquartered in Rotterdam, the Netherlands.

Part of Stichting TBI, TBI Bouw BV is a Dutch company that provides engineering and construction services. The company is based in Rotterdam, Netherlands.

Synchroon BV engages in developing and realizing residential and retail projects. It focuses on inner city area construction; residential and mixed use buildings; reallocation and transformation of existing real estate; and special residential environments on the outskirts of the urban area. The company was founded in 2008 and is headquartered in Utrecht, Netherlands.

Croonwolter&dros BV operates as an engineering company with activities in the industrial, infrastructure, and utility sectors. It offers asset management, automation, geothermal, maintenance, system integration, tunnel design, tunnel maintenance, inspection, safety, revitalizing, and security services. The company was founded by Hendrik Jan Wolter in 1875 and is headquartered in Rotterdam, the Netherlands.