BuS.Trainers goal is to overcome skills mismatch and boost competitiveness in the construction sector. Vocational teachers hold a crucial role for the transfer of knowledge to current and future workforce at the sector. Based on existing evidences, building up VET trainers’ skills in Energy Efficiency and Renewable energies is the required breakthrough to address the weak link between education and green innovation in the sector.By creating a sustainable cooperative network, main south-European sectoral organisations and VET providers will initially start this Alliance where a broad range of Stakeholders will be gradually involved. The general aim is to jointly develop and deliver a thorough training system for VET Trainers to better perform teaching in sustainable construction with a variable set of interconnected activities, fall under:*A new European sectoral qualification standard (Green VET Trainer at construction) following the EQF methodology- learning-outcome oriented- and underpinned with ECVET and EQUAVET principles.-Certification of competences through “Green Tag” accreditation, awarded either by the specific BuS.Trainers learning experience or by prior learning, and MoU arrangement to promote mutual recognition in diverse EU member states.*A collaborative platform to build community and support teachers in their continuing professional development (lifelong and life-wide learning):-Open and innovate training course with new technologies for computers and mobile devices (App) in 5 EU languages and other services and tools for career guidance, teaching repository, mentoring sessions, etc.The project will make a positive impact on VET providers enhancing their trainings/classes portfolio, on VET trainees and workers who will receive updated knowledge for green skills, on companies who will have better skilled workforce and on the rest of industry and public who will recognize the added value of cooperation in green curricula design and delivery.