Heitzmann AG
Reto Koller currently serves as Regionalverkaufsleiter at Heitzmann AG since February 2025. Prior to this role, Reto Koller worked at Schmid AG, energy solutions, from September 2020 to February 2025 as Verkaufsberater Domestic Systems Ostschweiz. Reto Koller also has experience from September 2013 to September 2020 at Viessmann in the position of VPI Verkaufsberater.
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