IT System Administrator - Critical Infrastructure (Rail) (m/f/d)

Job title: IT System Administrator - Critical Infrastructure (Rail) (m/f/d)

About the Role We are seeking an IT System Administrator to join our team and support the operation and development of complex IT systems in a safety-critical rail environment. You will ensure reliable operation, integration and monitoring of IT and OT systems that are essential for the safe and efficient functioning of rail infrastructure.

What You'll Do

• Plan, operate, and maintain complex IT systems in a critical infrastructure environment with high availability requirements.
• Ensure compliance with defined Service Level Agreements (SLAs) and internal quality standards.
• Integrate and configure IT systems into existing and new infrastructures, with a strong focus on IT/OT security.
• Monitor system performance and proactively identify and resolve issues.
• Support the definition, implementation, and continuous improvement of operational processes and tools.
• Create and maintain technical documentation for systems and processes.
• Configure, parameterize, and test IT applications in line with operational and security requirements.

What We're Looking For

• Completed vocational training as a Fachinformatiker:in, Elektroniker:in fuer Informations- und Systemtechnik, Techniker:in, or a comparable qualification.
• Solid experience in the administration of Windows Server systems and Active Directory.
• Good knowledge of network technologies (Network Layer, Link Layer, Physical Layer).
• Basic knowledge of IT/OT security and experience in critical infrastructure environments.
• Experience with monitoring tools (e.g. CheckMK) is a plus.
• Linux experience, preferably with Red Hat Enterprise Linux, is desirable.
• Structured and analytical working style with a strong focus on problem-solving.
• Good communication and teamwork skills, with the ability to work independently and take responsibility.
• Business fluency in German is required; good English skills are an advantage.

Nice to Have

• Microsoft certifications (e.g. Microsoft Certified: Windows Server Hybrid Administrator, Azure Administrator).
• Experience in the rail, transportation, or energy sector.
• Knowledge of relevant standards (IEC 62443).

Compensation & Benefits

• Flexible working hours, sabbatical, 30 days vacation & special leave days; mobile work: Hybrid work & mobile work abroad.
• 13th monthly salary, accident insurance & company pension plan.
• High standard company restaurant & meals subsidy.
• Health management: E-GYM Wellpass & in-company sports groups; health promotion.
• Kindergarten subsidy / childcare in vacation periods & paid child sickness days.
• Subsidized Deutschland ticket, Job bike & parking lots.
• Company parties & events: Christmas party, NextGen Speakers Night.
• Company suggestion system & free research and development.
• Structured onboarding with buddy in the first months; extensive training and professional development; German language courses & annual employee dialogue.