Your external IT department and an emerging national champion in the IT services market. citadelle systems Group offers solutions from Managed Services to Security and Cloud/Virtualization all over Germany. Address: citadelle systems AG Im Teelbruch 134a 45219 Essen Germany T: +49 2054 80025-0 Registry court: AG Essen, HRB 30055 Executive Board: Tobias Kaulfuß (CEO), Noel Kienzle (COO) Chairman of the Supervisory Board: Andreas Rupp Tax ID: 112/5959/0659 Sales Tax ID: DE325061552