Leading the request, offer comparison, and selection of suitable assembly service providers together with Field Service, Leading price and contract negotiations as well as claim and addendum management and performance management, Controlling and monitoring order processing (order confirmations, changes, deadline tracking, deadline assurance), Strategic management and further development of the "Field Service" product group in EMEA, expansion of service provider relationships, and active supplier management, Ensuring compliance with relevant tax requirements (CIS, WHT, RCT, reverse charge) in close cooperation with the tax department, Regular review and approval of invoices as part of contract management, Continuous optimization of procurement processes, identification of potential savings, and risk minimization, Support in the development of purchasing strategies for large-scale projects in an international environment, Intensive exchange with suppliers for capacity control, Ensuring HSE and quality requirements for suppliers