Energietechnik Essen GmbH

Energie Technik Essen GmbH

Global Leader in rotor retaining rings
and further steel solutions

Founded in 1811 Location: Essen, North Rhine-Westphalia

Energietechnik Essen excels globally as a specialist rotor retaining rings. We are also specialize in crafting pressure remelted, corrosion-resistant martensitic cold work steels with exceptional toughness and maximum hardness. Utilizing Green Steel raw blocks in Electric Slag Remelting Plants (PESR/ESR), our products cater to energy machine construction, aerospace, medical technology, and the food industry.

Our products

High-nitrogen steels

High-nitrogen steels (HNS) such as Cronidur® 30, which we developed, have unique properties for highly demanding, critical applications.

Retaining rings

We have been manufacturing cap rings for turbo generators for over 100 years and are constantly developing them further. This has made us the ...

Our passion:
Innovative solutions made from green steel

Discover our rotor retaining rings expertise

GMH Gruppe Essener Energietechnik Röhre

With over a century of dedicated manufacturing, we take pride in being leading in rotor retaining rings production for generators. Our precision-engineered pieces, crafted at our location, demonstrate exceptional durability against centrifugal forces in generators spinning at speeds of up to 3,600 revolutions per minute. Trust in our longstanding experience for superior quality and reliability.

GMH Gruppe Essener Energietechnik Stahlstangen

Superior Expertise in Extreme Conditions

CRONIDUR® 30, our cold work steel, excels as a specialist with unique properties. Ideal for aerospace, mechanical engineering, medical, pharmaceutical, and food technology, it also enhances the production of high-quality consumer goods. Trust our expertise for superior performance in demanding conditions.

Reliability in numerous applications

GMH Gruppe Essener Energietechnik Stahlabfertigung

Our precision-crafted special steels are sought after worldwide, providing reliability in various applications. From satellites to Formula 1 racing cars, premium knives, beverage filling plants, and luxury watch springs, our steels guarantee durability and innovation.

Your contacts
at Energietechnik Essen GmbH

Nicolas Kardalo
Plant Director Energietechnik Essen GmbH | Managing Director
GMH Gruppe Kontaktbild Marlen Thiemig
Marlen Thiemig
Communications Energietechnik Essen GmbH
GMH Gruppe Avatar
Bernd Schuster
HR Energietechnik Essen GmbH

How to find us

Energietechnik Essen GmbH
Westendstr. 15
D-45143 Essen

Plan your route

Energietechnik Essen GmbH

Westendstraße 15
45143 Essen

Postfach 10 10 09
45010 Essen

Tel.: 0201/17786-0
Fax: 0201/17786-2771
E-Mail: info.ete@gmh-gruppe.de

Commercial register:
Amtsgericht Essen HRB 17278

Sales tax identification number:

Nicolas Kardalo

Tax number:

Team spirit is our key to success | GMH Careerre | GreenSteelPioneers

With green power ahead

We are pioneers in green steel – and we have big plans for the future. Join us! Together we are paving the way for a better world.

Shape a sustainable future with us

We are not only forging green steel, but also a green future.

Georgsmarienhuette Stahlproduktion Elektrolichtbogenofen

As a visionary company, we not only set standards in steel production, but also in personnel management. We rely on the power of diversity and create a working environment that is characterized by openness, respect and appreciation. Our corporate culture is based on success and performance, entrepreneurship and GMH team spirit. Our employees enjoy a wide range of benefits – from 30 days of vacation to accident insurance.

Our advantages for your …


Financial stability is an important part of life. That’s why we offer a wide range of benefits to help you achieve your financial goals.


Your health is important to us. That’s why we give you access to a comprehensive range of benefits for supporting your health and improving your wellbeing.

Work-life balance

We know how important it is to balance your work with your private life. We want you to be able to make the most of your time to achieve both your professional and personal goals.

Work environment and career development

Professional and personal development should be fun! We offer a whole range of benefits to help you fulfil your potential with us.


In the office, and especially in production, the health and safety of our employees is our top priority. So we invest in all kinds of mechanisms to keep you safe and protected in the workplace.

Come because you’ve come to the right place. Stay because you’ll never get bored with us.

 | GMH Karriere | GreenSteelPioneers

Would you like to apprentice with us, like Janina and Kira?

 | GMH Karriere | GreenSteelPioneers

Would you like a great start to your career, like Chantal and Ahmed?

 | GMH Karriere | GreenSteelPioneers

Looking for a job with genuine prospects, like Christina and Sven?