Our Team

Joost de Kluijver


Greener Tech can also be appealing and fun. I’m really excited to see how CTL is turning positive impact into commercial and social value. I lead the commercial department for this great industry innovation, which means I connect to B2B tech users and their suppliers. Connect to me for questions on how the tech you use can be more aligned with your values - and why that is a smart thing to do.

Reinhardt Smit

Supply Chain Director

I grew up in South Africa and Ghana and have seen what opportunities the African continent brings. I put this experience to use in ensuring that our supply chain delivers the quality of service we promise our customers. I manage the company operations, including the supply chain. You can reach out to me to explore potential supply chain partnerships.


Ryan Bark

Sales Director

Joining Closing the Loop is really closing the loop for me in bringing together my passion for technology in a commercial environment and making an impact today that makes sense to my children. You can reach out to me with any questions on commercial partnerships and to get started on sustainable IT. 



Timo Bottema

Senior Business Developer

Sustainability is at the core of everything I do, which naturally makes me very excited to work for a company as ambitious as Closing the Loop. On a daily basis, I support our clients in their ambitions to work towards circular IT procurement. Talk to me if you're interested in green tech solutions for your organization!

Wiske Hermans

Inside Sales Specialist

I like how CTL found a pragmatic way to create social, environmental and economic impact, as soon as today. By not focussing on the problem, but rather on solutions, and acting on them. I can help both existing and new clients to implement, market and communicate green tech CSR ambitions. Connect to me if you'd like to find out how Closing the Loop's innovations could compliment your companies values.

Hannah Jung

Operations & Responsible Business Coordinator

I believe in CTL’s innovative and effective business model for circularity that combines social, environmental, and economic value. I coordinate the supply chain in Africa and to make our business operations fully responsible and compliant. You can reach out to me for anything related to our supply chain, our general business principles and CSR related topics

Jan van Berne

Board Member

Jan van Berne is a hands-on investor actively helping and driving growth for scale-ups. Jan holds board positions in companies including Closing the Loop and Eco- Movement. Jan has over 20 years of international operational (in more than 14 countries) and M&A experience. He invests in biotech and agritech, IT, media, and telecom, with a strong focus on impact and sustainability.

Marc Mullens

Board Member

After an economics study in Amsterdam Marc started a business in catering and bakery in 2004. Marc strongly believes that unique values, tenacity, good marketing, passionate leaders with a strong vision, diverse and empowered employees and a good management thereof are key aspects to a successful enterprise. Marc is an active impact investor looking forward to helping CTL scale its business in a sensible way and consequently making a better world for his children.