De Vries & Van de Wiel is a contracting company specializing in civil engineering, environmental technology and sand exploitation. The activities vary from soil and waterbed remediation to dredging and landfill techniques.

Struyk Verwo Infra Regio West is a specialist in public pavement projects. The business provides street-defining solutions that make the public space attractive, safe, accessible and sustainable.

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