Our team

NB the coronavirus measures were taken into account when taking the group photo. 


Introducing the National Environmental Database team:

Jan-Willem Groot – Director

Working towards the circular economy. I actually can’t think of a better challenge and it’s great to contribute to this fantastic goal.

Construction and infra consume large amounts of raw materials and produce carbon emissions. If we reduce our raw material consumption and reuse the used raw materials, we can change the linear economy into a circular economy; vital for the climate, for combatting global warming and
for boosting biodiversity.

The transition has started and the base camp needs to be ready by 2023. We need to have halved our use of primary raw materials by 2030, with construction and infra being circular by 2050. If we are to achieve this transition, we need good and clear measurements.

Stichting National Environmental Database (NMD) manages the calculation method and the associated database, making our organisation a professional partner in the transition process towards a circular construction sector. We have a diverse team and our enthusiasm is high. We’re looking forward to inspiring others to work actively towards this transition process.
Sustainability has been a key theme throughout my career and it is my ambition to contribute to circularity goals together with colleagues and partners. I would like to call on all involved parties to work with us on this so we can achieve this important goal.

> View my LinkedIn here

Tom de BoerTom de Boer – Senior Data Manager

With my technical-administrative education and interest in nature and the environment I feel so at home at NMD. Sustainability is in danger of becoming a meaningless phrase and our Assessment Method helps prevent this by making it measurable. For me, NMD and the environmental performance system will be successful when they lead to a construction sector that is actually more sustainable. It’s vital that our users have every confidence in the system. As one of the first contact points at NMD, I’m aware that I play a key role in this. Feel free to contact me if you have any questions about the Assessment Method, the NMD Verification Protocol and the environmental data in the NMD. I work with colleagues to monitor both input procedures and environmental data use and keep data quality high. In my spare time, I’m a korfbal referee, I practise tai chi and enjoy reading. My main hobby is walking in the countryside and birdwatching. I’m very much involved in the protection of birds as volunteer board member at Vogelbescherming and I also count birds in my neighbourhood. City birds have strong connections with our cities and I hope that a more sustainable construction sector will help preserve biodiversity.
> View my LinkedIn here

Heleen ScholteHeleen Scholte – Communications Officer

As communications officer, I’m involved with the website, newsletter, social channels and the annual congress. I really enjoy dealing with content and communications and I’m looking forward to further expanding on what we have so far! I’ve been interested in everything that grows and blooms for as long as I can remember and love wandering in the countryside with my husband, children and dog. I’m delighted that I’m now also able to do my bit for a more sustainable environment through my work. As well as walking with the dog and family, I also love Italian cooking and baking. 
> View my LinkedIn here

Piet van Luijk- Account Manager

I’ve been working in policy development to safeguard health and environmental quality in buildings and civil engineering structures since the ‘Sustainable Construction’ appendix to the National Environmental Policy Plan Plus. I’d like a system of functional descriptions with performance requirements supported by practical guidelines and instructions on how to achieve a set performance. I’m currently advising Stichting National Environmental Database on designing and developing such a system  for the environment/circularity.

The Environmental Performance Assessment Method for Construction Works is a huge step forward in calculating the environmental impact of buildings and civil engineering structures in a clear, manageable and supported way.  We can then help the environment by incorporating certain environmental performance requirements in design briefs and invitations to tender etc., after which the choice of construction products and building systems can be optimised.

My motto in this is ‘For circular construction, managing the environmental impact takes precedence over going around in circles with materials’. 
But if going around in circles somewhere causes friction, then I’m happy oil the machinery.

Jara Schulz – Data Manager

There are still many steps to be taken towards a sustainable society and it’s extremely important that we prevent greenwashing. It’s good to see increasing numbers of manufacturers and sectors adding their products’ environmental data to the NMD, which makes reliable results available. Manufacturers also use environmental data to innovate and reduce the environmental impact of their product. And that’s really important. My curiosity and analytical skills are so useful to my role at the NMD. I have a background in Industrial Design and Industrial Ecology (science of sustainability) and enjoy analysing and devising solutions for sustainability issues. As well as being creative, I’m often found outdoors at boot camps, doing slacklining, juggling or photography, and I also enjoy climbing. 

Pieter Lieffering – Account Manager

You don’t need to be an environmental activist to see that there are limits to the explosive growth in demand for raw materials, as we saw over the past century.  A further increase in demand for raw materials will increase the environmental, global warming and other sustainability problems we’re currently facing. The NMD provides insight into the environmental effects of construction products used in infrastructure projects, homes and offices, making us an important link between policy and practice. For me, the most important challenge is to keep filling the NMD with low environmental impact products, based on broadly supported research, so our calculation tools can calculate reliable Environmental Cost Indicators (ECIs) and Energy Performance of Buildings (EPBs). The stakes are really high both for individuals and society.

I take time out from this by hopping on my racing bike, walking with my dog every day and enjoying eating and drinking with family and friends (preferably Italian food).
> View my LinkedIn here

John Drissen – Account Manager

Our current construction methods have a huge impact on the climate. Fossil and mineral material resources are being depleted, resulting in a scarcity of construction materials and a negative impact on nature, people and environment. I’d like a world in which everything is designed in a recoverable, reusable and regenerative way. I’m John Drissen, architect and civil engineer with 20 years’ experience in designing and project managing Civil and Utilities Construction (C&U) projects and airport facilities. I’m a professional with a heart for sustainability and a passion for architecture and construction. I’ve been working as account manager at NMD since May 2021, where I lead important BIM, DigiGo and Bio-based materials’ projects and work to integrate environmental performance during the design phase. At Stichting National Environmental Database  I’d like to contribute to producing concrete results and agreements for circular construction in the Netherlands.

Monique VosMonique Vos – Office Manager

As office manager, I’m our organisation’s first point of contact. I’m responsible for personnel management, salary administration and facility issues. I also carry out various administrative tasks for bookkeeping and the Board of Directors.
In my spare time I enjoy yoga, fitness and tennis as well as reading.

Harry NiemanHarry Nieman – Adviser

The world is crying out for change. Raw materials are being depleted, the climate is changing and biodiversity is disappearing. That’s why we need to act to transform our linear economy into a circular economy. As a major consumer of raw materials and high carbon emitter, the construction industry must join us in this.

The transition has started and we want to have achieved base camp by 2023, have halved our use of primary raw materials by 2030 and ensure that the construction sector is circular by 2050. If we are to monitor this transition, we need to be able to measure it. Stichting National Environmental Database manages the assessment method and associated database. In a short time, our organisation has grown to become a professional partner in the transition towards a circular construction sector. We have a diverse team and our enthusiasm is high. We’re looking forward to inspiring others to work actively towards this transition process. My personal ambition is to contribute to ensuring that my children and grandchildren (our future generations) are left with the best possible world, which is why I’m proud to be able to do my bit towards this important challenge.
> View my LinkedIn here