* Strategic further development of business by means of acquisition and establishing business with new customers. * Development of the five-year plan for key accounts in consultation with the Sales Director. Identification of suitable target projects and initiation of necessary measures for business success. * Planning of short-, medium- and long-term customer sales. Calculation and evaluation of annual targets in collaboration with Sales Director, * Initiation of strategic measures for the fulfilment of future customer requirements in consultation with the Sales Director, * Developing and maintaining new and existing customer relationships and ensuring professional customer relationship management, * Maintenance and improvement of relations with central decision-makers at customer organizations across all regions, * Extensive commercial care of the customer in the event of complaints and change requests. * Preparation and hosting of customer visits, trade fairs and customer events, * Ensuring the achievement of targets for the customer by managing commercial activities. * Processing of incoming customer requests and internal coordination with the respective divisions, * Compiling the costs for preparing offers from the individual divisions and creating a finance model, * Checking, clarifying and minimizing the economic risks for the company as part of the offer preparation, * Detailing documents for the offer preparation based on analysis of market developments and trends, * Price negotiations with customer within the framework of executive board instructions, * Monitoring of offer deadlines and approving deviations if need be, * Training of new staff, * Creation of presentations.