The Consultants Directory

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The Cleantech Directory

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Cooltree is a professional ESG real estate consultancy that advises real estate owners and managers in Europe.

Copper Oak

Copper Oak is an advisory firm founded in 2016 principally acting in Europe, Middle-East and Africa for international clients. We, at Copper Oak, believe that change is possible and sustainable when management and production processes take people and their socio-economic environment into consideration. We place people, ethics and a sustainable environment at the heart of our consulting activity.


We help build the circular economy. Our consultancy projects, cutting-edge research and ventures help accelerate the transition. Systemic change is what keeps us busy day and night - and leads to innovation.

Cornelissen Consulting Services

Cornelissen Consulting Services is an energy consultancy that initiates and advises on energy projects. Key concepts in the working area of ​​Cornelissen Consulting Services are: heat, CHP and biogas.

Cornwall Insight

Cornwall Insight is an independent energy research, analytics and consulting firm. The company employs over 100 people in three different markets. We are widely recognised for our objectivity and commitment to facilitating positive market and policy change, whilst also advising customers on how to navigate and comply with energy market dynamics, rules and regulations.


corsus accompanies you on your way to more sustainability. We give you impulses for innovations and advise you on development and strategy processes. We offer practical solutions that take future trends into account and support you in their concrete implementation.


Since the formation of CREM in 1989, we have become experts in the fields of (international) corporate social responsibility, natural capital, circular economy and sustainable production and consumption. These are areas where, over the years, we have shown that we can make a difference. Shared value and sustainable business development are core concepts. We are committed to contributing positively to the solution of (international) social and environmental issues and seeking opportunities for clients in this field.

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