Memberships & Partner


Paul Rüster & Co. GmbH has been working actively with TÜV-Nord CERT GmbH for years.

TÜV NORD CERT GmbH is known as an accredited test center for management system certification services as a recognized and reliable partner. In this cooperation, we continuously develop our quality management system.

Our managing director Mario Michel has been a personal member of the German Society for Quality for over 10 years.

The inputs from quality circles with local industrial partners and from the individual exchange of experts at DGQ events support the improvement and further development of our management system.

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Eisbären Berlin Supporter

We are a member of the Eisbären Berlin Supporter Club.

The Eisbären Berlin are a Berlin ice hockey club that has been a founding member of the German Ice Hockey League since 1994. Since 2006, more than 8,000 individual companies have decided to support the Eisbären Berlin supporter club.



iSMA CONTROLLI was founded in Italy in 1936 and from the start has focused on products for controlling systems and machines for heating, ventilation, air conditioning and refrigeration. Even today, the Italian company is one of the most important manufacturers of control valves and actuators for the HVAC sector.

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