Senior Windows System Engineer
About the Role
Our client, a leading financial institution based in Luxembourg, is seeking a Senior Windows System Engineer to join its IT Production Department.
Reporting directly to the Head of Division, the successful candidate will play a key role in ensuring the stability, performance, high availability, and security of the Bank’s critical Windows Server infrastructure operating within a highly regulated banking environment.
The position covers a broad range of infrastructure engineering activities, including Windows Server administration, PowerShell automation, Active Directory & PKI governance, Level 3 incident escalation, technical project coordination, and knowledge transfer to L2 teams.
This is a highly visible technical role requiring close interaction with cross-functional teams, including Risk, Cybersecurity, Application teams, and Infrastructure operations.
Key Responsibilities
- Windows Systems Engineering & High Availability
- Administer, maintain, and continuously optimize critical Windows Server infrastructure (versions 2016, 2019, 2022, and 2025).
- Ensure second-line operational management of key Microsoft infrastructure components, including Active Directory, ADFS, ADCS, and Windows Failover Clusters.
- Guarantee adherence to strict banking SLAs, high-availability requirements, and service quality standards.
- Automation, Scripting & System Optimization
- Design, develop, and deploy advanced PowerShell scripts to automate administrative tasks and system deployments.
- Proactively identify areas for infrastructure hardening, automation, and reliability improvement.
- Cybersecurity & Compliance Integration
- Implement and enforce security best practices and hardening guidelines across all Microsoft server environments.
- Ensure infrastructure alignment with internal security policies, risk frameworks, and regulatory banking requirements.
- Technical Coordination & Project Management
- Lead and coordinate technical mini projects within the IT infrastructure perimeter.
- Collaborate closely with multi-disciplinary teams (VMware, Network, Security, Applications) to ensure successful project execution.
- Plan and manage workload autonomously using project management methodology (e.g., MS Project).
- L3 Support & Knowledge Transfer
- Act as an escalation point for complex Level 3 technical troubleshooting and incident resolution.
- Author, maintain, and update high-quality technical documentation and procedures.
- Provide structured knowledge transfer and guidance to Level 2 operational teams.
Required Qualifications & Experience
- Education: Master’s or bachelor’s degree in computer science, System Engineering, Information Technology, or a related field.
- Professional Experience
- Minimum 8 years of experience in IT system engineering and administration.
- Proven experience working within high-availability, mission-critical environments (Banking, Finance, or insurance sector strongly preferred).
- Technical Mastery:
- Confirmed expertise in Windows Server (2016, 2019, 2022, 2025).
- Advanced scripting and automation capabilities with PowerShell.
- Strong expertise in Active Directory, ADFS, ADCS, and Windows Failover Clustering.
- Solid understanding of Microsoft infrastructure security and hardening practices.
- Asset / Complementary Skills:
- Hands-on exposure to virtualization technologies (VMware, Omnissa Horizon).
- Familiarity with network concepts (DNS, WebProxy, Firewalls, Load Balancing) and MS Project.
Language Requirements: Knowledge of Luxembourgish constitutes a strong advantage.
Professional fluency in French AND English (both written and spoken) is mandatory.