germany-berlin: inspection of ventilation system./ maintenance hast neukölln./ "maintenance and repair work for heating and hot water (hast) in berlin-neukölln maintenance and repair of the supply area heating and hot water ha station up to the line valve (not in the rental properties) for 2023 with an option for an extension. we welcome applications from companies with migration-related skills. we also welcome the identification with the sustainability goals of the state of berlin. this contract can be extended: yes, namely: by 1 year at a time, provided that no contractual partner gives notice of 6 months before the end of the contract."