Quality assurance and certification

Quality assurance

Our four criteria for quality are:
  • Accurate: our findings are repeatable and free of errors.
  • Thorough: according to the latest knowledge and research protocols.
  • Apt: in line with the requirements of the client.
  • Practical: feasible, realistic and address the research question.

Waardenburg Ecology has held a certified quality management system in accordance with ISO 9001 since 1998. We have held an ISO 17025 certificate (L572) for hydrobiological research since 2013. All our field workers hold a Safety for Operational Supervisors (SOS-SSC) certificate and we are working towards company-wide SSC certification.

Beyond expectations

We continue to carry out satisfaction surveys using a recognised online system. Both our customers and our employees are asked to evaluate how they have experienced the project and collaboration with the aim of improving our service even further. Although we pride ourselves on having a consistent customer satisfaction rating of over 95%, we continue to look for ways to improve our service even further.

Working environment

We are committed to providing a safe and pleasant working environment for our employees, as well as sub-contractors and temporary staff. After all, good working conditions ensure optimal performance throughout the company. We strive to maintain the health of our employees and support and reintegrate employees who have been on leave due to illness or other reasons. Together with our occupational health and safety advisors (ArboNed), we are working to limit ill health and further improve reintegration. Every three years, we offer employees a preventive medical examination, and where appropriate, employees receive periodic medical examinations and safety training. Our fieldwork clothing is tick-resistant and we are a partner of the annual Lyme desease screening programme run by Innatoss.


Safety is very important within Waardenburg Ecology. Our safety protocols are regularly communicated to all employees. Toolbox sessions are held when required and workplace inspections are carried out to increase safety awareness. The principles of last minute risk assessment (LMRA) are applied in our projects, and materials and equipment are periodically inspected and working safety is a permanent item on the agenda in team meetings.

By continually evaluating our experiences we increase the awareness of our employees and continuously improve the health and safety of our operations.


ISO 9001 certification
ISO 9001 certification
The quality assurance system of Waardenburg Ecology is approved by EIK certificering B.V. and certified according to ISO 9001:2015.

NEN-EN-ISO 9001:2015 certificate

ISO 17025 certificate L572
Our laboratories at Haren (Gn) and our headquarters in Culemborg have been certified by the Dutch Accreditation Council (RVA) in accordance with ISO 17025 NEN-EN-ISO/IEC 17025:2017 for various hydrobiological activities.

ISO17025 certificate L572

Scope to 1st September 2026


We regularly collaborate with other consultancies, companies, charities and research institutes, within the Netherlands and also internationally.

Branch organisations

Waardenburg Ecology is co-founder and member of the Dutch branch organisation Netwerk Groene Bureaus, and we also contribute to working groups and advisory committees.


We continue working on making our business operations more sustainable through the CO2 performance ladder and have already obtained the level 3 certification. Together with colleagues, institutes, social groups and governments, we continue to actively look for ways to further reduce our emissions. We have a proactive environmental policy with the aim of reducing our CO2 emissions even further. We set clear targets and undertake steps to achieve these. We are reducing our reliance on fossil fuels and of our CO2 emissions through the use of renewable energy.
Read more over the steps we are taking to reduce our CO2 footprint

The Foundation for Climate Friendly Procurement and Business (SKAO)
Visit the SKAO website