1980: Foundation of the Jäger Wärmetechnische Geräte GmbH & Co. KG in Lingen by Mr. Jäger. Jäger used to produce heat exchangers for end customers.

1984: Mr. Bründermann joins to Jäger. 

1987: Take-over and integration of the company into Rosink GmbH + Co. Maschinenfabrik.

1988: Rosink takes over NORMA GmbH and administration moves from Lingen to Nordhorn.

1991: Due to the good development of the division for equipment manufacturing it is made independent as "Rosink Apparate- und Anlagenbau GmbH". Mr. Bruendermann becomes co-partner.

1993: Rosink moves into the new production plant located at the Otto-Hahn-Strasse in Nordhorn / Germany.

1994: Rosink-Contracting-Modell was awarded the "Preis der Deutschen Gaswirtschaft". 

1997: Rosink takes over the activities of the company Wärmetechnik Stummsdorf, a producer of surface cleaning systems for heat exchangers and boilers.

1998 - 2003: In view of the increasing market for finned tubes, Rosink further increases their finning capacity to 18 machines running in two or three shifts per day.

2004: Rosink extends the product line of heating surface cleaning systems by very efficient water cannons RWC and the patented water spraying system RWS. The fintube division completes their production programm with a new machine for steel finned single or twin-tubes ("H"-fin).

2005: Rosink acquires the activities of the Belgium Mannesmann subsidiary Carnoy Fintube NV. In 2006 Rosink complements the NOH-FIN production with HF-finned tubes.

2005: Rosink acquires the activities of insolvent FEG Heizflaechen-Reinigungsanlagen GmbH in Datteln. FEG used to produce shot cleaning systems for the cleaning of downstream heating surfaces. Rosink now offers an extended portfolio for surface cleaning systems.

2008: Rosink becomes the worldwide leading producer of welded finned tubes.

2009: "U Fins Rosink" is named at the heating technique software of KED.

2010: Start of the production of the Rosink HAMMER single rapping cylinder.

2011: Effective from 28 Oct. 2011 Bilfinger Berger Power Service GmbH is the new owner of Rosink Apparate- und Anlagenbau GmbH.