About us

Kiwa KOAC has been testing and testing for more than 50 years and has proven to be a solid and reliable partner for our customers. We have no interest in the use of certain materials or the application of road construction solutions. The customer can rely on independent and honest advice.

The combination of the services provided by Kiwa KOAC is unique and enables an integrated approach to the problems faced by its clients. Our clients can be found among road contractors and public organizations. The Company provides engineering strength with field experience, and has solid knowledge of materials and pavement surfaces. The dedicated laboratory and equipment facilities can carry out testing of materials for a wide variety of properties.

Development and innovation

Kiwa KOAC is the market leader in its field in the Netherlands and has national coverage, via its four well-distributed offices. Kiwa KOAC can maintain its leading position by development of new products and innovation of testing equipment. Equally important is our focus on the development of the intellectual quality of staff and personnel. The improvement of the competences of our employees at every level of our organisation is conducted under the overarching framework Kiwa Trainig.


As a modern, socially responsible company, we have an eye for the human and environmental factors. We increasingly provide solutions that contribute to sustainability, liveability, safety and mobility. Within the company, we are actively involved in reducing the environmental burden by improving workflows, in the layout of working areas and the introduction of clean technology.

What we do

Kiwa KOAC is the independent leading company in the Netherlands for research and consultancy in the field of mobility infrastructure, with emphasis on roads, airports, dike revetments and industrial sites, such as container terminals. Our services are provided to public and private road owners who are involved with the management, design, execution and maintenance of pavements. We perform tests and research, and provide consultancy services regarding building and pavement materials, pavement constructions and pavement surfaces. The products can be classified into laboratory testing, road testing, quality support of construction works, consultancy, and research into the performance and properties of materials. Furthermore, support is offered to clients regarding pavement management, as well as training and courses.

Working fields

Each application has its own specific requirements and conditions. KOAC•-NPC is an expert in the working areas in which roads and pavements play an important role.

Quality of Kiwa KOAC

Kiwa KOAC is an impartial company and has no interests vested in its test or consultancy outcomes. As a result, Kiwa KOAC has gained trust from its clients. The company has a broad client base consisting of contractors, municipalities, the National Motorway Administration, the ministry of defence, engineering and consultancy companies, provincial authorities, water authorities, pavement material producers and firms which operate large industrialised zones such as container terminals and airports.