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We at Tenwinkel GmbH & Co. KG have been developing and producing technical ballasting and technical components based on Heinrich Tenwinkel's original idea since 1959. We have been guided by a mission statement since 2008. We are world marked leaders.


We are training employees since 2014!

We are interested in subsequently employing the trainees in a permanent position.

Find out more about our apprenticeships!


Process mechanic specializing in surface technology

A brief overview of the training

Those who complete dual training to become a process mechanic for coating technology mainly learn in the training company and in the vocational school.

Process mechanics for coating technology apply paints,vanishes and other coating materials to wood, metal and plastic surfaces. This can be done by machine or manually using various surface coating technology methods. To do this, they operate, monitor and maintain the corresponding facilities and systems. They plan the work processes, coordinate them with the upstream and downstream manufacturing processes and prepare workpieces for coating. They also carry out quality controls.

During your apprenticeship with us you will learn:

  • Pre- and post-treatment of uncoated and coated surfaces
  • Testing of workpieces for coatability
  • Choosing the right method for degreasing / cleaning coatings
  • which mechanical, chemical and electrolytic methods are available for different surfaces
  • Spray process for liquid and powdery materials
  • Pre-treatment of wood and concrete by filling, priming and staining
  • Common methods of treating plastics
  • Differentiate between paints and varnishes in terms of their mode of action 
  • Maintenance of resources
  • Planning and controlling of work processes, controlling and evaluating the result
  • Handling of hazardous substances
  • Use of application techniques
  • control and operation of large technical equipment

Merchant for wholesale and foreign trade

Subject area wholesale

The training at a glance

But what exactly do you actually do in your apprenticeship as a wholesale and foreign trade clerk? Put simply, you buy goods from a manufacturer and then resell them. For example, you buy a certain amount of laser parts from a steel burning company and make sure that they are finally available for production. You make sure that the storage of the products causes as few costs as possible, that the delivery takes place without breakdowns, you also check whether the goods have arrived in the ordered quantity and quality and how many are currently in stock. So you know when you have to reorder new goods.

During your apprenticeship with us you will learn:

  • Buying goods of all kinds from manufacturers or suppliers
  • Selling products to trade and industry
  • Adhering to cost-effective warehousing and a smooth flow of goods
  • Monitoring of the logistics chain
  • Checking incoming goods and inventory
  • ordering goods
  • Planning of production and delivery of goods


and framework conditions

Precast Concrete Builder

  • Interests: Craftsmanship
  • School subjects: handicrafts/technology, natural sciences and mathematics,
  • School leaving certificate: 'Hauptschule', 'Realschule' leaving certificate
  • Duration of training: 3 years
  • Vocational school: at Gelsenkirchen (boarding school incl. drivingservice home-boarding school possible)
  • School attendance: Block school lessons four times a year for 4 - 6 weeks

Concrete is back in fashion, many everyday objects as well as design elements are made of concrete. The job offers good perspectives on the job market.

Process mechanic for coating technology

  • Interests: good color perception and skill
  • School subjects: natural sciences and mathematics, art, handicrafts/technology
  • School leaving certificate: 'Hauptschule', 'Realschule' leaving certificate
  • Duration of training: 3 years
  • Vocational school: at Münster (reachable by express bus)
  • School attendance: 1 or 2 days a week

Process mechanics for coating technology are trained in many areas and have very good future prospects on the job market.

Merchants in wholesale and foreign trade

  • Interests: Commercial and organizational thinking
  • School subjects: German, economics, mathematics and English
  • Qualifications: 'Realschulabschluss', 'Abitur' (high school diploma)
  • Duration of training: 3 years
  • Vocational school: at Ahaus
  • School attendance: 1 or 2 days a week


Specialist for warehouse logistics

  • Interests: Organizational movement of goods, physical activities
  • School subjects: mathematics, German and English
  • School leaving certificate: 'Hauptschule', 'Realschule' leaving certificate
  • Duration of training: 3 years
  • Vocational school: at Ahaus
  • School attendance: 1 or 2 days a week

Specialist for warehouse logistics

The training at a glance

The range of tasks includes for example stock checks, the creation of loading lists or the processing of shipping and accompanying documents. Furthermore, more general or more abstract requirements are placed on the specialist for warehouse logistics, such as the handling of IT systems and the knowledge of occupational safety and environmental protection. Due to the regrouping of the job profile and the link with the commercial professions, the handling of warehouse indicators and basic accounting terms is also expected. This content enables the warehouse logistics specialist to carry out a complete calculation of a warehouse. This is required to check and control the efficiency and profitability of the warehouse.

During your apprenticeship with us you will learn:

  • Organization of work, information and communication
  • Logistic processes and quality assurance measures
  • Insertion of work equipment
  • Acceptance of goods
  • Storage of goods
  • Picking and packaging of goods
  • Shipment of goods

Precast Concrete Builder

The training at a glance

Precast concrete builders produce weights, ballast and other concrete products from concrete and heavy concrete.

For the different weights, they use ready-made molds or assemble molds and formwork from multiplex panels, squared timber, GRP, polyurea and other formwork material. In doing so, they follow the design drawings and plans exactly to install the end product at the specified location.

In series production, prefabricated reinforcement cages are placed in the molds.
If you manufacture individual concrete products, e.g. weights for special machine construction, you build in reinforcement made of steel rods and iron mesh for static reasons

With the help of machines, precast concrete part builders shorten steel rods, bend them into shape according to specified plans and then join them together with binding wire. They anchor the reinforcement in the concrete formwork. Now the concrete mix can be placed.

They compact the liquid concrete with formwork vibrators and give it an even surface with trowels and smoothing boards. If necessary, they treat the finished parts after hardening with grinding machines. This also requires a certain design skill.

Precast concrete workers transport the finished concrete products to the storage or loading area using hoists or transport equipment. If necessary, they also monitor the loading of the finished parts onto trucks.