Join the 7-Day Circular Business Challenge!

Currently not available. The next round will be announced in 2024.

Mini-course to (re)design your product in a circular and sustainable way.

7 topics in 7 days, including access to 30+ videos, database, worksheets and social media templates for community engagement.

What we do


open data

Bridging science and industry by creating new tools, methods and technologies benefiting the circular economy. We created an open database and circular calculator.

Circular Strategy


We are your partner in integrating circularity, innovation and sustainability in corporate strategy cycles. Including biomaterials, waste treatment and design optimization.


Circular Design

workshops & courses

The facilitation of circular (re)design sessions for products and services. We offer online courses, workshops and design services.


project-based services

Support with applications for tenders, innovation centers, factories, products and other initiatives that advance circular entrepreneurship.

Clear, consistent and compelling strategy for more circular impact.


Building a sustainable future

We help designers, makers, entrepreneurs and organizations in their transition towards becoming more circular and sustainable.

Whether you’re looking to improve an existing product or create a new spin-off, department or project proposal, we’re here to support your ambitions.

Workshops & Courses

Accelerate circularity in your organization with our courses

With over ten years of experience in industry and academia, we now offer a selection of our methods in workshops and online courses. Join today and become part of the movement.

From Zero to One

Covers the basics of circularity and helps you and your team getting started to make the jump from zero to one. After completion, you have a clear vision, mission and roadmap.


The circular economy offers new strategic propositions. In this course we help you to establish a strategy for your product, service or organization.

Business Models

New business models are emerging to accomodate for circularity. In this course you discover how to apply them in the commercialization of your product.

Circular Design

Products are re-evaluated in the context of circularity. Learn about circular design methods and (re)design your product with this in-person workshop.

Redefining business as usual

We collaborate with organizations that strive to make circular impact.

Our approach is hands-on and highly interactive. We work with a high standard  and aim to empower you with tools, methods and technologies so you can become a leader in your field. 


Discover tools and methods to  accelerate your circular economy implementation.


Circular Statistics

Open database for sustainability and circularity.

Circular Statistics is a digital reference book with key figures for energy, water and CO2 performance per material. The aim is to accelerate the transition to a circular economy. The figures are a reference for product designers, buyers, analysts and policy makers who are working towards creating more sustainable products. The basic figures are available free of charge, to enable more organizations and individuals to make sustainable material, design and purchasing choices. This is a non-profit initiative of Circular Engine and Duinn.

Authors: Nicole Bakker & Age van der Mei (DUINN)
Publication: 2021
Category: open data, non-profit, free tool
Referencing: use provided citation when using the tool



Our publications on sustainable design and circular economy strategies are presented here.


Photovoltaics in Historical Built Environments

An interactive design manual for architects, policymakers, property owners, developers, engineers and students.

Photovoltaics in Historical Built Environments provides an overview of existing and new BIPV (Building Integrated Photovoltaic) technologies and applications suitable for historical buildings. This interactive design manual utilizes QR-codes with tools, videos and additional information to support the written content.

Author: Nicole Bakker
Publication: 2013
Paperback: 112 pages
Size: 21 x 21 x 1 cm


Nicole Bakker

Founder, Circular Engine

Nicole Bakker is a (bio)materials scientist, design engineer of regenerative systems, author, maker, public speaker and entrepreneur. She envisioned Circular Engine as a catalyst for positive change, offering courses, workshops and hackathons to help (aspiring) entrepreneurs, designers, makers and engineers create sustainable products and business strategies in the circular economy.

With a strong interdisciplinary background in engineering, design and business, Nicole is well equipped with tools to help you solve complex problems related to climate change and the circular economy.

For over a decade, Nicole utilizes her skills for systemic transformation and sustainable impact. In 2013, she authored Photovoltaics in Historical Built Environments, leading to policy change and the implementation of building integrated solar panels (BIPV) in the Netherlands.

Currently at the Massachusetts Institute of Technology (MIT), her research at the Center for Bits and Atoms is about advanced manufacturing with biomaterials. She also developed and characterized bio-based building materials during her Master in Design Engineering (MDE) at Harvard University. Prior to this, Nicole worked on earthquake-resistant structural retrofitting of existing buildings. Bridging the gap between theory and practice is one of her strengths that help you realize success in the circular economy.

What they say

Nicole has guided Omrin in the realization of the new strategy and in particular the route to a distinctive circular proposition. Developing a circular vision, defining circular procurement, implementing SDG development goals, defining our circular waste processing concept and determining the relevant communities were important pillars of her work. Nicole is a smart young woman with a clear vision of a circular economy, a healthy portion of critical thinking and the competences to make the right connections. I highly recommend working with Circular Engine.

John Vernooij

CEO, Omrin

Nicole means a lot to OG Clean Fuels. She’s led the strategy process for Public Affairs and is pushing hard on the data-side for getting equal policy treatment of all sustainable fuels: a critical requirement to make the circular economy feasible and affordable. She was in contact with members of parliament, ministries and research institutions to provide feedback on new policy. This was very effective and led to a number of successes. Nicole is very knowledgeable, investigates topics in detail, and presents the findings in a creative and clear way. For example, we now have an interactive dashboard for sustainable road transport. How cool is that?! Lastly, she helped to set up a new department, and provided training and support for our new employees.

Marcel Borger

CEO, OG Clean Fuels

Through her knowledge, network, and supportive leadership, Nicole has helped many of my projects gain the traction and important insight into circular economies that they needed to grow. Nicole helped turn our MIT Energy Hackathon event into a replicable model used by other top-tier institutions. She also helped my international environmental restoration organizations, Beyond Coral and CHARM, gain the necessary traction through her university and United Nations platforms. Without question, Nicole’s guidance and support have been a great benefit to my organizational mission and I would highly recommend working with Circular Engine.

Stephen Rodan

President, Beyond Coral Foundation

Ready to get started?

Get in touch or sign up for the challenge!


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