IT System Administrator

The focus of your work will be providing expert technical support to our business clients. You’ll analyze issues and requirements, identify the root cause, and independently implement appropriate solutions. For complex issues, you’ll work closely with the relevant specialists on the team., * Analysis and independent resolution of technical issues and service requests

• Administration of Windows 10/11, Windows Server, Active Directory, as well as DNS and DHCP
• Support for Microsoft 365, Exchange Online, user accounts, mailboxes, and SharePoint
• Administration and troubleshooting in RDS and terminal server environments
• Monitoring and administration of Veeam backups as well as Sophos endpoint and firewall solutions
• Administrative tasks in virtualized environments, particularly VMware
• Installation and deployment of clients, servers, and network components
• Regular maintenance and upkeep of our technical documentation and central knowledge base
• On-site assignments at customer locations as needed, when remote support is not possible or systems are being installed on-site

Do you have extensive experience in IT administration and want to not only address technical issues but also resolve them permanently? Then you’ll find a diverse range of responsibilities with us, offering room for initiative and professional growth., * At least 3 to 5 years of practical professional experience in IT support, system administration, or at an IT systems provider

• An apprenticeship as an IT specialist in system integration or a comparable qualification; other professional backgrounds are also welcome if you have relevant practical experience
• Strong knowledge of Windows client and Windows server environments, Active Directory, and Microsoft 365
• Ideally, hands-on experience with RDS, Veeam, Sophos, or VMware
• A structured and solution-oriented approach to work, as well as a professional manner when dealing with customers
• Good German language skills and English proficiency suitable for day-to-day IT work

It’s not essential that you already master every technology. What matters is a solid technical foundation, a sense of responsibility, and a willingness to continuously expand your knowledge. To further your professional development, you’ll work alongside experienced colleagues and gradually take on additional responsibilities and areas of expertise.

• Full-time, permanent employment contract with 30 days of vacation
• Predictable work hours within a coordinated scheduling model to cover our service hours

• Work from home by arrangement

• Laptop and modern technical equipment
• Targeted professional development and opportunities for personal certification
• Opportunities for career development in specialization, consulting, and project work
• Independent work with short decision-making and coordination processes
• JobRad, Jobticket by arrangement, free parking, and free beverages
• Regular team activities and a work environment where mutual support is a given

Haubner & Siegmund IT Services GmbH is an owner-managed IT services company in Cologne. We support businesses of various sizes and across different industries-from traditional client and server environments to Microsoft 365 and RDS, as well as virtualization, backup, and security solutions.