Company

Carpe Diem

Our name says it all

Since 1949.

For many decades, our company has stood for reliability, innovative technology and uncompromising quality down to the finest detail. With the products we develop in the fields of mechanical engineering, tank construction and plant engineering, we set new standards in terms of safety, ease of operation and durability. High-quality results start with well-structured processes. Certification according to DIN EN ISO 9001 and ISO 3834 is therefore a matter of course for us. Our team of experienced specialists applies its extensive expertise to develop the optimum solution for every requirement. We welcome every challenge.

Corporate brochure as PDF file (german) »

Our Team

The contact persons

#diemteam

[Translate to English:] Diemwerke Christoph Hagspiel

Christoph Hagspiel
CEO

T: +43 (0)5573 84666
E-Mail

[Translate to English:] Diemwerke Ferdinand Hotz

Ferdinand Diem
CEO

T: +43 (0)5573 84666 82
E-Mail

Laura Marjanovic
Executive Assistant

T: +43 (0)5573 84666 13
E-Mail

[Translate to English:] Diemwerke Karin Fessler

Karin Fessler
Accountant

T: +43 (0)5573 84666 14
E-Mail

[Translate to English:] Diemwerke Dieter Moosmann

Dieter Moosmann
Sales assistant

T: +43 (0)5573 84666 40
E-Mail

[Translate to English:] Diemwerke Jürgen Kugler

Jürgen Kugler
Purchasing manager

T: +43 (0)5573 84666 30
E-Mail

[Translate to English:] Diemwerke Andreas Siembicka

Andreas Siembicka
Planning engineer

T: +43 (0)5573 84666 50
E-Mail

[Translate to English:] Diemwerke Harald Egle

Harald Egle
Planning engineer

T: +43 (0)5573 84666 21
E-Mail

[Translate to English:] Diemwerke Martin Fessler

Martin Fessler
Constructing engineer

T: +43 (0)5573 84666 81
E-Mail

Ing. Georg Steurer
Constructing engineer

T: +43 (0)5573 84666 85
E-Mail

[Translate to English:] Diemwerke Angelina Strauß

Angelina Strauß
Marketing | Communications

T: +43 (0)5573 84666 10
E-Mail

Arda Yildiz
IT

T: +43 (0)5573 84666 24
E-Mail

The Diemwerke

A success story.

When: 1949
Where: Dornbirn
Company founder: Alfred Diem

The period immediately after the Second World War was marked by an acute shortage of raw materials. A talent for improvisation and construction skills were much in demand. These valuable skills allowed company founder Alfred Diem to lay the stable foundations for a company which continues to flourish today.

1949Diem opens for business in Dornbirn, as a workshop with one employee. Its first product is a mass-produced kitchen knife, manufactured from metal scraps from the armaments industry. In addition, written-off military vehicles form the basis for farming tractors and electricity generators. In this way, the company is able to supply sawmills with transport vehicles and lifting tools.

1950Alfred Diem already holds numerous international patents. Hundreds of the first mass-produced mixers are also delivered.

1955The first pressure vessel heads are produced. The customer is Hoval Werke, based in Vaduz, Liechtenstein.

1959Development of the first drive motor-operated cement mixers.

1963Space requirements require a relocation to Lochau, to the premises of the former Bayerische Leicht Metall Werk, and previously the Oberhänsli Dieselmotoren Werk. Diem Werke's subsequently further grows into a modern production business.

This allows Diem Werke to grow into a modern manufacturing business.

1987The son of the founder, Mr. Harry Diem, took over the management.

1994We take over a storage engineering business. With annual increases in sales revenue of at least. 20%, Diem Werke thus becomes one of the leading producers in this sector.

1995Premiere of a modern classic: The first high performance pan mixer from the legendary DZ 120V range is produced. Even today, synonymous with reliability and durability.

2001The Diem-Werke GmbH takes over the warehouse and office areas of the former Resch area in Lochau. The so-called "Werk II" is used as construction machinery and tank warehouse.

2004A milestone for the mixing of non-flammable masses and steel-reinforced concrete: dynamic agitators for pan mixers. Extremely low wear, even with highly abrasive materials.

2009Acquisition of Unitec Energietechnik GmbH, which are specializes in the development and distribution of tank construction.

2010Structural expansion of warehouse space in "Werk II". Managing Director Harry Diem passes away completely unexpectedly.

2012Establishment of a 7000 m² production hall with administrative building in Hörbranz. A connection to the warehouse "Werk II" by bridge is also provided.

2013Moving into the new building in Hörbranz and certification according to DIN EN ISO 9001 and ISO 3834.

2014With the new plant and state-of-the-art machinery, the company also resumed training young skilled workers. Since then, Diem-Werke has been providing practical, future-oriented apprenticeships in metal technology.

2024Ferdinand Diem, grandson of company founder Alfred Diem and son of Harry Diem, joins the management team and leads the company together with Christoph Hagspiel.

2025Structural expansion: Sheet metal delivery and storage are relocated indoors. At the same time, the production hall is extended to the property boundary and equipped with an additional 10-tonne crane, creating optimal conditions for loading large-scale equipment and tanks.

TodayToday, Diem-Werke is broadly positioned as a versatile steel construction and mechanical engineering company. A state-of-the-art machinery park, a high level of in-house production and skilled employees enable the company to manufacture everything from individual components to complex machinery, tanks and industrial plants. Its company size allows for short decision-making processes and a high degree of flexibility. Production is carried out in accordance with high quality standards, including ISO 9001, EN ISO 3834 and EN 1090, for renowned customers in Austria and abroad.

OUR QUALITY STANDARDS

WE HAVE IT IN BLACK AND WHITE.

Reliable standards for maximum precision and safety.

Our company and our employees are regularly subjected to international standards inspections. At three-year intervals, our welders are tested according to EN ISO 9606-1 in the areas of MAG, TIG, and electrode welding. Similarly, the operators of our welding equipment are assessed according to EN ISO 14732.

Our company management system incorporates the following normative requirements:

EN ISO 9001:2015
EN ISO 3834-3
EN 1090-2 (EXC2): Welding certificate, conformity of the factory production control, and thermal cutting

These corresponding inspections and tests are conducted by external bodies.
Furthermore, as of last year, we have been recognized as an excellent training company!

News

From the House of Diem.

What’s new with us?

Whether it’s exciting projects, fresh ideas, or a glimpse into our daily work – this is where we keep you up to date. Want to get even closer? Follow us on Instagram and never miss an update.