Engineer Windows System Senior
Published on 17/09/2026
ADVISORY KEY
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
o Administer, maintain, and continuously optimize critical Windows Server infrastructure (versions 2016, 2019, 2022, and 2025).
o Ensure second-line operational management of key Microsoft infrastructure components, including Active Directory, ADFS, ADCS, and Windows Failover Clusters.
o Guarantee adherence to strict banking SLAs, high-availability requirements, and service quality standards.
· Automation, Scripting & System Optimization
o Design, develop, and deploy advanced PowerShell scripts to automate administrative tasks and system deployments.
o Proactively identify areas for infrastructure hardening, automation, and reliability improvement.
· Cybersecurity & Compliance Integration
o Implement and enforce security best practices and hardening guidelines across all Microsoft server environments.
o Ensure infrastructure alignment with internal security policies, risk frameworks, and regulatory banking requirements.
· Technical Coordination & Project Management
o Lead and coordinate technical mini projects within the IT infrastructure perimeter.
o Collaborate closely with multi-disciplinary teams (VMware, Network, Security, Applications) to ensure successful project execution.
o Plan and manage workload autonomously using project management methodology (e.g., MS Project).
· L3 Support & Knowledge Transfer
o Act as an escalation point for complex Level 3 technical troubleshooting and incident resolution.
o Author, maintain, and update high-quality technical documentation and procedures.
o 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:
- Professional fluency in French AND English (both written and spoken) is mandatory.
- Knowledge of Luxembourgish constitutes a strong advantage.