Senior Network Administrator

Radio Frequency Systems; Hannover; Vor Ort; EUR 55.000 - 75.000; Vollzeit

Zusammenfassung

A leading RF solutions provider in Hannover is seeking a Senior Network Administrator. Responsibilities include managing network infrastructure, overseeing firewall and VPN systems, and ensuring IT security compliance. The ideal candidate has at least 3 years of experience, with expertise in Fortinet firewalls, cloud services, and a commitment to user support. This role offers a dynamic work environment with opportunities for professional growth.

Qualifikationen

• At least 3 years of experience in network infrastructure administration.
• Solid expertise in managing firewall and VPN systems.
• Ability to facilitate end-user training and create technical guides.
• High responsibility and reliability.

Aufgaben

• Administer and monitor company-wide network infrastructure.
• Manage central firewall and VPN systems.
• Participate in IT projects from planning to execution.
• Ensure compliance with internal and external security requirements.
• Support cloud service administration and development.
• Handle IT support requests and train users.

Kenntnisse

Network infrastructure administration

Firewall management (Fortinet)

VPN system configuration

IT security standards knowledge (ISO 27001, NIS2)

Cloud services management (Microsoft 365, Azure)

User support and training

Problem-solving skills

Ausbildung

Vocational training in IT (IT specialist for system integration)

Tools

Fortinet firewalls

Microsoft 365

Azure services

VMware

Jobbeschreibung

Job Advertisement: Senior Network Administrator

We are searching for a Senior Network Administrator at our HANNOVER (DE01) facility.

Main mission of the role

• Network Operations and Administration: Independent administration and monitoring of the company-wide network infrastructure (IT/OT), including switches, WLAN, routing, and VLANs. Development and implementation of improvement measures to enhance network stability and performance. Creation and maintenance of technical documentation.
• Firewall and VPN Systems: Management and configuration of (global) central firewall and VPN systems (Fortinet) in coordination with supervisors and the IT team. Implementation and optimization of technical security measures.
• Participation in IT Projects: Partial responsibility for infrastructure projects – from planning and coordination to the implementation of individual technical work packages.
• IT Security and Compliance: Support in ensuring compliance with internal and external security requirements (ISO 27001, NIS2). Involvement in vulnerability assessments and the implementation of appropriate mitigation measures.
• Process Improvement and IT Environment Development: Active contribution to the ongoing development of technical processes and standards in the IT department. Proposing ideas to optimize infrastructure, security, and operations.
• IT Administration (Servers, Services, Systems): Support in managing physical and virtualized Windows servers. Participation in patch management as well as user and group administration. Troubleshooting of technical issues within the IT/OT system landscape.
• Cloud and Standard Services (Microsoft 365 / Azure): Support in the administration and further development of Microsoft 365 (SharePoint, Exchange, Teams, etc.) and Azure services. Execution of administrative tasks such as license management and technical configurations.
• User Support and Training: Handling of IT support requests. Creation of technical guides and conducting IT-related training sessions and user onboarding.

Skills, knowledge and abilities

• Completed vocational training in IT (IT specialist for system integration) or a comparable qualification.
• At least 3 years of hands-on experience in the administration of network infrastructures, ideally in an international environment.
• Solid expertise in managing Fortinet firewalls and VPN systems as well as in routing, VLANs, WLAN, and troubleshooting network issues.
• Proven experience in operating, optimizing, and documenting network infrastructures (IT and OT), preferably using HPE/Aruba components.
• Familiarity with common IT security standards and regulatory frameworks (ISO 27001, NIS2), along with practical experience implementing related measures.
• Track record in technical project work: planning, coordinating, and executing assigned work packages.
• Willingness to support end users and share knowledge through training and onboarding sessions.
• Independent and solution-oriented mindset, paired with a high degree of responsibility and reliability.
• Excellent German and good English skills, both written and spoken.

Ideally, you also bring:

• Additional experience with HPE/Aruba switching and WLAN technologies.
• Knowledge of Windows Server administration and virtualized environments (VMware).
• Experience managing and enhancing Microsoft 365 and Azure services, especially Exchange Online, SharePoint, Teams, and OneDrive.
• Skills in creating technical documentation as well as training materials or internal user guides.
• A keen interest in continuously improving processes, standards, and technical operations within IT.

About RFS Radio Frequency Systems (RFS):

RFS delivers end-to-end RF solutions and expert services needed to evolve wireless and broadcast networks today and tomorrow. Our cables, connectors & antenna systems are based on more than 100 years of experience delivering cutting-edge RF solutions and industry firsts. Our solutions are recognized globally for their innovation, superior performance, and unmatched quality. For more information, visit our website or follow us on Twitter.