Senior IT Administrator (m/f/d) M3B GmbH combines the event and marketing expertise of the brands MESSE BREMEN, CONGRESS BREMEN, ÖVB-Arena, GROSSMARKT BREMEN, and Bremer Ratskeller – Weinhandel seit 1405. Every year, it hosts a large number of its own and guest events, enlivens the city's neighborhoods with special and weekly markets, operates the fresh produce center in Überseestadt, invites visitors to take guided tours of the historic wine cellar of Bremen City Hall, which is part of the UNESCO World Heritage Site, and offers its customers the world's largest selection of selected German wines far beyond the city limits. M3B is looking for a successor for its IT team as soon as possible: Senior IT Administrator (f/m/d) In this position, you will be responsible for ensuring the functionality of the IT infrastructure, IT systems, and IT applications. You will report to the IT & Application Management team leader. Your challenge: Responsibility for internal networks and system infrastructure to ensure an available and efficient IT environment Optimization of the IT infrastructure Monitoring of central infrastructure components (Hyper-V, firewall systems) and coordination of external service providers. Administration of Microsoft Active Directory and M365. Application support in second-level support. Planning, coordination, and implementation of IT projects. Introduction and support of new software and hardware systems in the company. Support of the IT infrastructure at internal events (including preparation and follow-up). You bring with you: Successfully completed training as an IT specialist or a degree in computer science, or comparable qualification Several years of relevant professional experience in the field with proven success Comprehensive knowledge of server and storage system operation In-depth knowledge and experience in the administration of Microsoft Active Directory and M365 Practical experience in IT infrastructure, ideally with virtualization (Hyper-V) Responsible work ethic, both independently and according to specifications, even during off-peak hours Team spirit, strong communication skills, and a confident and friendly manner Very good written and spoken German and English skills We offer: Work-life balance: Flexible working hours with flexitime account and 29 days of vacation Hybrid working: Work from home up to 40% of the time Mobility: Benefit from our job ticket subsidy and the option to lease a job bike. Family-friendly: You receive paid leave for the first few days if your child is sick. Healthy & fit: Company fitness offers for you (Hansefit and EGYM). The position is for an average of 40 hours per week and is generally suitable for part-time work. M3B supports individual working time models. Please apply online by March 10, 2026, using the application on the intranet under "My Company / Jobs." If you have any questions, please contact Ms. Witzkonski. M3B GmbH is committed to equal opportunities and diversity. Applications from people with international backgrounds and people of all genders are welcome. Severely disabled applicants and those of equal status will be given priority if they have essentially the same professional and personal qualifications. In cases of underrepresentation, applications from women will be given preferential consideration, unless there are compelling reasons to favor another applicant. M3B GmbH, Reference: 26.007, Angelika Witzkonski Additional information City of Bremen Type of position Full-time Start date Immediately Job posting no. 26.007 Business area M3B GmbH Responsible Angelika Witzkonski