Create cost estimates and offer calculations for turnkey construction projects. Conduct technical and contractual risk assessments. Prepare bases for offer and post-calculation, including execution variants and project optimizations. Determine costs for building construction, outdoor facilities, site setup, formwork, and equipment. Review tender documents, specifications, and inquiries for offer preparation. Involve internal and external specialists (purchasing, subcontractors, technical office, external engineering firms) for offer preparation. Gather current price data and track actual price developments for realistic future calculations. Prospectively build and lead a team.