Company

Carpe Diem

Our name says it all

Since 1949.

For many decades our company has stood for reliability, innovative technology and uncompromising quality right down to the last screw. With the products we develop, we set new standards in terms of safety, extreme ease of use and longevity. Services are particularly valuable when they have been well-structured from the very beginning. This is why, the certification according to DIN EN ISO 9001 and ISO 3834 is a matter of course. We welcome any challenge, whether it be custom designs for special applications or specific paintwork according to customer requirements. Our team of experienced professionals and specialists uses their extensive knowledge to find the optimum solution.

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

[Translate to English:] Diemwerke Lisa Kemter

Lisa Kemter
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

[Translate to English:] Diemwerke Georg Steurer

Ing. Georg Steurer
Constructing engineer

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

[Translate to English:] Diemwerke Angelina Strauß

Angelina Strauß
Administration / Marketing

T: +43 (0)5573 84666 10
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".

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.

TodayWell-known companies such as Hilti, Alpla and many more are today Diem Werke customers. And the specialists from Lochau have also meanwhile made a name for themselves with intelligent solutions for the plastics and foodstuffs industry.
Diem Werke is also optimally equipped for the future. All thanks to its cutting-edge design, drafting and manufacturing technologies, and of course also to its traditional pioneer spirit and attention to quality.

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.

Bauma 2025

Munich

A complete success.

Diem-Werke GmbH looks back on a successful week at the trade fair. At the world’s largest construction machinery trade show, we presented both our proven classics and exciting new products – for the first time with an outdoor booth. A big thank you to everyone who visited us – for your interest, inspiring conversations, and promising new connections. We’re excited about what lies ahead!

Family business

Since 1949.

A new era begins.

In 2024, Diem-Werke GmbH proudly celebrates its 75th anniversary. The company looks back on a long tradition and continuous development, marked by innovation and quality in mechanical engineering. This special anniversary year also marks the end of an era: after many years in management, Susanne Hotz is entering a well-deserved retirement. Diem-Werke GmbH will remain a family business: Ferdinand Diem, grandson of company founder Alfred Diem and son of the late Harry Diem (†2010), is stepping into her role and taking over the management. Together with Christoph Hagspiel, he will lead Diem-Werke into the future. Their shared vision is to continue expanding the company’s strong brand, explore new markets, and focus on sustainable innovation. With this generational shift, Diem-Werke GmbH is well positioned to maintain its status as a leading company in the industry and to continue its proud family legacy for decades to come.

Pan mixer for UHPC

DZ 300, DZ 500, DZ 750, DZ 1000

The powerhouses for ultra-high-performance concrete.

The innovative series of ultra-high-performance concrete mixers opens up new dimensions. The high density and strength of ultra-high-performance concrete, also known as Ultra-high-strength concrete (UHPC), pose new challenges for the industry. Learn more »