Van der Velden Rioleringsbeheer Amsterdam BV provides various sewage management services. The company takes care of declogging, cleaning and inspecting sewer systems.

Van der Meer Oppervlakte Techniek specializes in the application of powder coatings to aluminum profiles, sheets and parts. They include façade parts as well as profiles of windows and doors.

Van Keulen has been a name in Amsterdam for more than 100 years. In 2014, the company has grown with more than 50 employees into a successful supplier of wood and building materials.

Verwater is a global contractor in industrial and petrochemical installations, specialized in tank maintenance and construction.