Senior Infrastructure & Security Engineer (m/f/d)

Role Overview

In this role, you will be responsible for the operation, development, and security of a modern hybrid IT environment. You will work at the intersection of infrastructure engineering, cloud operations, and cybersecurity, ensuring stable and secure global IT services.

You will combine hands-on technical work with architectural responsibilities and actively contribute to the continuous improvement of Microsoft-based infrastructure and security platforms.

Key Responsibilities

• Operate and improve hybrid cloud and on-prem infrastructure based on Microsoft Azure and Azure Local HCI
• Manage Azure Virtual Desktop (AVD), storage systems, backup infrastructure, and workplace services
• Administer Azure databases and enterprise backup solutions (e.g. Veeam)
• Support infrastructure architecture decisions and platform modernization initiatives
• Ensure scalability, resilience, and high availability of IT systems
• Manage identity and access services with Microsoft Entra ID
• Implement and enhance Zero Trust security models and least-privilege access concepts
• Improve authentication methods and lifecycle management processes (Joiner/Mover/Leaver)
• Operate Microsoft Defender XDR and Microsoft Sentinel (SIEM)
• Monitor, analyze, and triage security alerts and incidents
• Support incident response, investigation, containment, and remediation
• Develop and optimize detection rules and security use cases
• Improve security posture using Microsoft Secure Score
• Support incident management and disaster recovery processes
• Execute backup, recovery, and restoration procedures
• Maintain immutable backup concepts and DR documentation
• Participate in recovery testing and post-incident reviews
• Support network and perimeter security including segmentation and secure connectivity
• Ensure stable and secure global network operations
• Drive automation and efficiency improvements using PowerShell and scripting
• Contribute to continuous infrastructure optimization initiatives

Your Profile

• Several years of experience in IT infrastructure, cloud engineering, or cybersecurity
• Strong hands-on expertise in Microsoft Azure, Windows Server, virtualization, storage, and backup
• Experience with Microsoft Entra ID and identity & access management
• Solid understanding of Zero Trust architecture and modern security principles
• Practical experience with Microsoft Defender XDR and Sentinel (SIEM)
• Knowledge of incident response, security operations, and alert handling
• Experience in disaster recovery, backup strategies, and system restoration
• Good understanding of networking, segmentation, and perimeter security
• Experience with PowerShell and infrastructure automation
• Structured, analytical, and solution-oriented mindset
• Strong communication skills in English; German is a plus ( not mandatory)