Serve as the primary point of contact for all existing customers and build long-term, strong, and trust-based customer relationships., Proactively, strategically, holistically, and across-service advise and support customers, covering all services and the IT portfolio of the organization., Proactively identify customer requirements, capture initial needs (requirements engineering), and manage the subsequent process for offer creation within the organization., Proactively track and communicate future developments in the IT service portfolio to customers., Actively participate in the further development of the work area., Collaborate collegially with other departments within the organization and regularly conduct customer appointments.