Horst Sonnleitner has been educated to an electrotechnics engineer in the Technical College in Klagenfurt, Austria. In his career he specialized his skills to automation engineering, worked in the machinery industry and in chemical industry, where he led teams of engineers. The focus was on development and construction of machineries, executing investment projects and O&M service for large-scale production plants. Since 2010 he is in the PV business, started with designing, constructing and commissioning of large-scale PV plants in eastern and southern Europe. In 2012 he was co-founder of Encome Energy Performance, an international PV O&M service provider, where he was Technical Director until 2019. In 2020 he joined the Danish investment company Obton A/S. After establishing a technical department, he is leading the engineering team for greenfield projects since 2021.