The history of our owner-managed family business goes back to over 40 years of experience. We are “Solingen’s Steel Specialist” when it comes to welding and mechanical engineering. Because of our shared fields of competence, we are able to manufacture fast and flexible, but also in accordance with the high demands of our customers. The quality of our products and services and customer satisfaction are the highest priority.

In 1972 SSS was foundet to build security devices and developed over the years to become a specialist in welding and mechanical engineering.

Since 1996 we are specialised on repair, refurbishment and maintenance of used machines - especially machines mady by Kieserling® . Thanks to our know-how and experience in mechanical engineering, we were able to launch the first SSS new machine on the market in 19999. Since then our main business has been building new machines for the tube and bar processing.

In September 2015 the company was taken over by the Althajmer family. With a mix of tradition and innovation, the company has been continuously developed.

Due to unfortunate circumstances in connection with an extreme market situation, not least triggered by the Corona crisis, the company got into difficulties in 2021 that could not be dealt with on its own.

Fortunately, this resulted in a strong partnership with Bültmann GmbH, which led to the continued management of the company as SSS Schmitz GmbH.

Due to this positive development, including the takeover of our qualified team in Solingen, we will continue to be a reliable partner at the side of our customers and suppliers in the future.


Welding company was founded by Mr. Schmitz


Additional field of competence: mechanical engineering, overhaul and repair or Kieserling® machines


SSS builds first new machine


Takeover of SSS by Konstantin Althajmer and Jessica Althajmer


Expansion of assembly hall


Continuation of the company as
SSS Schmitz GmbH

Your contact persons

Konstantin Althajmer
General ManagerTel./Phone: +49 212 20641-39
Jessica Beckmann
Authorized RepresentativeTel./Phone: +49 212 20641-33
Marc Beckmann
Tecchnical Design and EngineeringTel./Phone: +49 212 20641-34
Thomas Schinschke
ManagerTel./Phone: +49 212 20641-31
Cornelia Althajmer
Assistent ManagerTel./Phone: +49 212 20641-35
Gudrun Schreier
AccountingTel./Phone: +49 212 20641-32
Markus Schwierz
Production Manager WeldingTel./Phone: +49 212 20641-38


Our team consists of reliable, motivated and qualified people who contribute to the quality of our products and services every day. We are characterized by flat hierarchies and a good working atmosphere. These are only some reasons why large part of the SSS family has been on our team for over a quarter of a century.

But junior employees are also important to us. We regularly train young people to become industrial clerks or industrial mechanics. So there is a continuous transfer of know-how. Please send your informative application to:

At the moment no open positions are available

Contact us

Always flexible, always available. Contact us. Your personal contact partner will always be on hand with professional advice. We are located centrally in the industrial area "Scheuren" in Solingen-Merscheid.

SSS Schmitz GmbH
Stephanstraße 20 | 42655 Solingen
Tel +49 212 20 641 - 30 | E-Mail

© 2021 SSS Schmitz GmbH