The Team
of Theta Concepts

Theta Concepts has an interdisciplinary team with diverse experience in energy technology, thermodynamics, renewable energies, environmental and economic engineering, as well as international management.

Engineers specializing in heat and transformation planning.

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Our Expertise

Our origins are in thermodynamics. We are well-versed in the first and second laws of thermodynamics. We do not design perpetual motion machines. Our concepts are based on energy flows, temperature levels, and efficiency chains. From supplying a municipality, to optimizing individual generators, to individual solutions for a single building or a large consumer.

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Our Mission

We develop sustainable supply concepts: climate-neutral, secure, and socially compatible. The focus is on identifying and designing the most economically and technically sensible supply options. We love what we do and look forward to every project we get to be a part of.

Theta Concepts Team Raphael

Our Task

The transformation process from fossil to renewable heat offers a wide range of technologies and utilization paths – from central supply via district heating based on waste heat, large heat pumps and energy storage, to decentralized concepts using air and geothermal energy, to green hydrogen and its derivatives methanol and ammonia.

We are technology-neutral and independent. We support you with your heat plan, your transformation process, or your feasibility study with well-thought-out concepts. The identification of the most economical and technologically sensible supply option is our primary focus.

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The right Team for your project

Theta Concepts Raphael Wittenburg

Dr.-Ing. Raphael Wittenburg

Founder

Engineering Concept Development Heat Planning | Transformation Concepts and Feasibility Studies for District and Local Heating

Theta Concepts Conrad Gierow

Conrad Gierow, M.Sc.

Founder Managing Director

Management | Support of Key Accounts in Heat and Transformation Planning

Theta Concepts Dorian Holtz

Dr.-Ing. Dorian Holtz

Founder

Project Coordination | Communication | Marketing, Sales and Product Development

Theta Concept Rebecca Zube

Rebecca Zube, M.A.

Project Coordinator

Project Coordination | Sales

Theta Concepts Marcel Pfeider

Marcel Pfeifer, M.Sc.

Project Engineer

Automation | Engineering

Theta Concept Lindsay Geissler

Lindsay Geißler, M.Sc.

Project Engineer

Municipal Heat Planning

Profilbild Madita Kruse2

Madita Kruse, M.Eng.

Project Engineer

Municipal Heat Planning

Profilbild Malte Schuemann

Dr.-Ing. Malte Schümann

Project Engineer

Municipal Heat Planning

Profilbild Lasse Goertzen

Lasse Görtzen, M.Sc.

Sales

Municipal Heat Planning BEW Studies

Theta Concepts Rasmus Poetke

Rasmus Pötke, M.Sc.

Project Engineer

Municipal Heat Planning

Avatar Sabine Rusch 2

Sabine Rusch

Team Assistant

#Hiring

Become part of the team and shape the heat transition.

We currently have no open positions for engineers. As we are growing very quickly, this may change soon. Feel free to leave us an unsolicited application if you would like to become part of the team. Just send us an email with a brief motivation and resume highlighting your qualifications. We don’t need a long cover letter!

Avatar Sabine Rusch 2

Team Support

Mini-job (Additional income for retirees, among others)

Office organization, good soul, taking care of the team’s physical well-being

Avatar Sabine Rusch 2

You

Unsolicited Application

Engineering, Automation, Coordination, Team Assistance