The Consultants Directory

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The Cleantech Directory

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Ingenieurbüro für Energiewirtschaft

Certified quality and environmental management. The IfE Engineering Office for Energy Management has been offering future-proof solutions for the strategic and operational development of your energy products and services since 1993. As a competent consultant and service provider, we support you with individual concepts and offers in setting up an effective process landscape. The result is a noticeable increase in the performance and competitiveness of your company.

Ingenieurbüro Jan Peter Ehlers

Consulting for the implementation of your project idea, advice and mediation including contract drafting with a full background of experience in planning, approval, construction and operation of wind farms and PV systems.


Whether public utilities, automotive, mobility or energy companies – mobility and energy are growing together and facing you with challenges. Together with us, you will see this change as an opportunity and shape your individual path to become an energy and mobility provider with new ideas and resilient business models.


inopitas focuses on strategic challenges of the energy transition. We support companies and institutions from the energy and hydrogen industry, (e-)mobility and beyond in the design, execution and implementation of strategic projects.

Inros Lackner

Sustainable solutions for people and nature. Our aim is to maintain the ecosystem as a source of life to mankind and to ensure its long-term performance, while also supporting economic development in selected areas in an ecologically sound way. We offer comprehensive, professional consultancy services, from the planning and design of energy generation facilities to individual electricity supply solutions. The use of renewable energies, such as wind, hydro, solar and geothermal, is one key area of our expertise.

Insinööritoimisto Gradientti

Our services focus on waste management and waste recycling and reuse. We offer customized solutions and guide our clients in the best possible way to achieve their goals.

Inspire Waste

The Inspire Waste Management experienced consultants can help you audit your waste costs, look for better deals, and take advantage of the latest technologies.

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