HNJ Constructions & Energy is a new company which is active in innovative constructions, environmental interventions and implementation of RES in public and private sector. It was founded in Kozani to manage projects of the “metallignant period” and for this reason it has organized a research department framed by technocrats, experts and scientists – researchers designing modern and innovative projects. In the field of energy (RES) it has specialized in geothermal by providing modern services contributing to environmental sustainability.