Close collaboration with project engineers in all service phases of HOAI and creation of concepts, design, and execution plans for building services (heating, ventilation, air conditioning, plumbing) or electrical engineering., Preparation of floor plans, schematics, sections, and detail drawings according to HOAI service phases 1-5., Design of systems according to technical regulations in coordination with the client., Coordination and consultation with internal specialist departments and external project participants., Participation in tenders, bid evaluations, and quantity surveying and invoice checks., Conducting technical clarifications and meetings., Contribution to and further development of planning methods, especially in the area of BIM.