HJS - Who we are

The people who work for HJS are just as diverse as the areas of responsibility in our company. This is something we are
particularly proud. People from eleven nations work for us in over 80 professions. Every year, we take on around six to eight trainees in up to ten different professions. We are distinguished as a family-friendly company.

As a family-run, medium-sized company based in Menden in central Germany, HJS Emission Technology GmbH & Co. KG has many years of experience and expertise in exhaust-gas aftertreatment. Some 450 employees are engaged in the development, production and marketing of modular systems for reducing pollutant emissions. Our innovative environmental protection technologies can be used either as original equipment or for retrofitting in passenger cars, commercial vehicles and a wide range of non-road applications.

In addition to systems for spark-ignition engines, HJS specialises in systems for diesel engines – especially for reducing the emissions of soot particles (PM) and nitrogen oxides. All systems meet the statutory requirements and are certified in accordance with the valid licensing regulations.

With a wide range of patents for DPF® (diesel particulate filters) and SCRT® (Selective Catalytic Reduction Technology), HJS sets the benchmark both nationally and globally.

Integrity and sustainability are the pillars of our business activities. Open, honest dealings with each other, as well as with business partners and customers, are the basis for our actions in the company from day one. We therefore regularly inform and train our employees on the subject of business ethics, as well as in the areas of health care, occupational safety and environmental protection.

We are motivated by the idea that we can make the world a little bit cleaner with our products. At all times, we ensure that our products do what our customers expect. In this way, we assume responsibility for our products and society.

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