We make
your products
work harder.

Georg Niessen, CEO/Managing Director
Graduate Industrial Engineer
More than 30 years of experience in the heat treatment industry

Andreas Hader, CFO/Managing Director
Master of Business Administration
More than 25 years of experience in various financial and controlling functions in the industrial sector

Radek Kozlowski, CTO/Technical Manager
Industrial foreman, technical business economist (IHK)
More than 15 years of experience in the heat treatment and steel industry

Motohisa Takahashi, Managing Director of Business Development
Bachelor’s degree (Japan) in Sales & Marketing
More than 25 years of experience in marketing and business development at the IHI Group


Do you want to work in a successful and innovative company and enjoy a versatile and responsible role?
As we grow, we are constantly looking for motivated and talented people to join our team.

For current vacancies at our various locations, please scroll down.
Your application documents can be sent by post or by email to bewerbung@ihi-vtn.com.


Do you have any questions? Your HR contact:

Vivienne Schwarz
Tel.: +49 (0)23 24/93 42 – 26
E-Mail: bewerbung@ihi-vtn.com

IHI VTN GmbH, Rüsberstraße 75
D-58456 Witten Herbede, Germany



You can find our job announcements here in German.

Corporate policy

As a company in the IHI Group, securing our company’s long-term existence is our top priority. For the VTN Group, however, sustainable action does not just mean a temporal dimension, but also encompasses the assumption of economic, social and ecological responsibility. Our corporate principles see the company not only as a source of profit, but also as a permanent element of society and the environment.

Interested parties (IHI, customers, suppliers, banks, insurance companies, public authorities, neighbours and our employees) decide on our company’s success rate. Our ideas and knowledge lead to continuous improvement. 

We want to create clear competitive advantages for our partners and ourselves in terms of:

  • Technology
  • Cost-effectiveness
  • Quality and reliability
  • Adherence to deadlines and service

We see it as a duty and a challenge to question what is already in place and to develop forward-looking solutions to our tasks by continuously improving them. Problems and identified mistakes are opportunities for us to innovate and improve.

When it comes to safeguarding the company, we strive for long-term success rather than short-term benefits. The benchmark for this is the group’s profitability, which must enable a reasonable return on the capital invested. The economical use of resources is an integral part and prerequisite of this economic responsibility.

As a group of companies, we believe that we are particularly well placed to achieve economic goals while taking into account social and environmental concerns. To maintain the necessary independence, the required financial resources should be generated largely from the company’s own resources. This is reflected in our high equity ratio and very good credit ratings by our lending banks.

The VTN Group does not enter into any speculative financial transactions. Financing activities are managed centrally to ensure compliance with the above-mentioned financing standards. In addition to the company’s interests, protecting the shareholders’ interests is also of great importance to ensure a stable capital structure.

Responsible handling of social conditions is an integral part of our corporate principles and is reflected both within the company and outside of it. From this, we derive the following compliance guidelines:

  • Compliance with legal provisions as well as official and statutory requirements is essential for us.
  • We oppose corruption, including extortion, bribery and tax evasion.
  • This also includes the observance of human rights in our companies.
  • We explicitly reject any form of undeclared, forced or child labour.
  • Our working conditions will at a minimum comply with the statutory and industry-standard regulations on working time and remuneration.
  • We expect our employees to treat one another in an appreciative and respectful manner. We reject all forms of discrimination and harassment.

Employees who discover violations of these guidelines have the right to contact management at any time, either directly or anonymously.

We maintain a neighbourly relationship with the citizens and representatives of our city and take their interests into consideration when managing our company. We provide timely and transparent information about perceptible changes for the neighbouring communities and are prepared to engage in a fair dialogue at all times.

Keeping our employees healthy is important to us. Occupational health and safety is therefore one of our top priorities. Our goal is “ZERO ACCIDENTS”. Every accident is preventable. VTN advocates the “zero-accident philosophy” in occupational safety, just as it does in quality assurance. Every accident or error must be seen as an indication of a vulnerability and every effort must be made to permanently eliminate the vulnerability.

Sustainable corporate governance also means securing jobs for our employees and creating reliable and competitive working conditions.

As a heat treatment company with a high level of energy consumption, we are particularly committed to protecting the environment and are responsible for making our activities as environmentally friendly as possible. It is our job to use natural resources for our processes as carefully and prudently as possible. Energy consumption is minimised as far as possible through the efficient use of energy and raw materials. We only use legally approved operating resources for our processes.

We have counteracted the pollution caused by “noise” in the process with effective sound insulation measures. The required cooling water is located in circuits that are constantly monitored in accordance with legal requirements. Waste is avoided to the greatest possible extent, separated by type and disposed of properly. Climate protection is important to us. Carbon dioxide emissions are reduced as much as possible by the efficient use of our power units.

As part of our energy and environmental management system, we also undertake to implement all necessary measures to provide our services with minimum energy consumption. This also includes continuously improving the energy performance of our facilities, and energy efficiency is explicitly taken into account when procuring new systems. Compliance with statutory requirements is a matter of course and a minimum requirement. One of our goals is to significantly increase the share of renewable energies in total energy use.

Our companies prepare a business plan for each year that sets out the explicit business objectives for a calendar year. These targets are based on the previous year’s results, the company’s economic situation and the economic forecast for the coming year.

Through continuous monitoring of the targets, a semi-annual review and regular internal audits, we have the opportunity to specify and manage them. The objectives are set out in points 2.1. to 2.3. of our Compliance Management System

We know our risks and continuously minimise them. We are aware of internal and external risks and consider them in all our decisions. In doing so, we also incorporate the interests and expectations of external and internal stakeholders in the decision-making process.

Efficient risk management is an effective tool for corporate management. An open risk culture and active employee participation in risk management are important prerequisites and foundations for this.

We communicate openly and constructively and keep our promises. We know our internal and external dialogue partners and their requirements, desires and expectations of us. We treat them with respect and empathy. Our communication strategy nurtures and strengthens the company’s image, identity and competitiveness. 

It creates an open and constructive communication culture. Employees help shape our communication culture and feel responsible for it. Our policy is announced and made available to all interested stakeholders, both internally and externally.


VTN Witten GmbH

Herbede Plant

Rüsbergstraße 75
D-58456 Witten-Herbede, Germany
Tel.: +49 (0) 23 24/93 42 – 0
Fax: +49 (0) 23 24/93 42 – 11

E-Mail: witten@ihi-vtn.com

VTN Witten GmbH

Annen Plant

Stockumer Straße 28 (Hall A7)
D-58453 Witten-Annen, Germany
Tel.: +49 (0) 23 02/95 619 – 0
Fax: +49 (0) 23 02/95 619 – 40

E-Mail: witten@ihi-vtn.com

VTN Wilthen GmbH

Zittauer Straße 67
D-02681 Wilthen, Germany
Tel.: +49 (0) 35 92/38 55 – 0
Fax: +49 (0) 35 92/38 55 – 33

E-Mail: wilthen@ihi-vtn.com

VTN Fritz Düsseldorf GmbH

Am Stadtholz 39
D-33609 Bielefeld, Germany
Tel.: +49 (0) 5 21/92 63 23 80
Fax: +49 (0) 5 21/32 54 10

E-Mail: bielefeld@ihi-vtn.com


Our automated and process-controlled heat treatment systems ensure high process reliability and very high reproducibility. Together with our innovative order management system and our process control systems, we can guarantee seamless documentation and archiving depth. Our aerospace-approved heat treatment systems are constantly monitored and documented in detail in accordance with the requirements of AMS 2750. This enables us to guarantee the highest quality specifications whilst complying with the prescribed standards and regulations for the heat treatment of your orders.

Aerospace certifications

Since 2011, VTN Witten GmbH has also been certified according to DIN EN 9100 “Quality Management Systems –Requirements For Aviation, Space And Defence Organizations”. This further seal of quality underscores our ability as a reliable and qualified supplier to our renowned customers in the aerospace industry.

Heat treatments in the aerospace sector require NADCAP (National Aerospace and Defense Contractor Accreditation Program) certification. NADCAP certification is audited and monitored by the Performance Review Institute (PRI).

Additional DIN EN ISO certifications

All VTN locations are certified according to DIN EN ISO 9001:2015.

The VTN Group is committed to environmental protection on its own initiative and responsibility and is certified in accordance with DIN EN ISO 14001:2015 at all locations.

The energy management system is designed to help us reduce energy consumption systematically and sustainably. At VTN, all locations are certified according to this standard.

This is the central and internationally most important standard for quality management in the automotive industry. It is a prerequisite for being able to supply the automotive industry over the long term. In case of new customers, it is usually a prerequisite for inclusion in the supplier base. VTN has now had all its locations certified according to this standard.

All certificates can be viewed and downloaded HERE 

About IHI

Founded in 1853, the IHI Corporation is a publicly traded Japanese industrial group with revenues of ¥1.172 trillion (EUR 8.400 billion) in 2021.

The company is active in the four main business areas “Resources, Energy and Environment”, “Social Infrastructure, Offshore”, “Industrial Equipment, Mechanical Engineering” and “Aerospace, Military Products”.

In November 2015, IHI acquired 100% of the shares in the VTN Group to further expand its activities in the field of heat and surface treatment. Together with its sister companies IHI Machinery and Furnace Co., Ltd (IMS), IHI Ionbond AG and IHI Hauzer Technocoating B.V., IHI now has four companies serving the market with equipment and services for heat treatment and PVD/CVD/PACVD surface coatings.