Windows Infrastructure Security
Context
In a highly regulated banking environment, a leading European financial institution launched several initiatives to strengthen the security, compliance, and resilience of its system infrastructures. The scope covered a global estate of over 30,000 Windows servers, operating in a 24/7 environment and subject to strict regulatory requirements, including those from the European Central Bank (ECB) and PCI DSS standards. To secure these critical environments and improve operational efficiency, Avaliance provided Level 3 Windows expertise, reinforced automation, and contributed to the industrialization of system administration and cybersecurity practices.
Challenges
The client needed to ensure the stability and security of its global Windows infrastructure while complying with strict banking regulations.
Key challenges included reducing vulnerabilities, improving operational resilience, industrializing system operations, and automating critical tasks to enhance productivity and reliability across a massive server estate.
Achievements
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Level 3 support across a global fleet of 30,000 servers and resolution of critical P0/P1 incidents
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development of PowerShell scripts to automate key operations (LUN inventory, patch management, SCCM checks)
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reinforcement of security compliance through GPOs, SCCM baselines, and Microsoft Defender for Endpoint
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SIEM alert monitoring, improvement of detection rules, and automated Windows Server 2022 migration
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knowledge transfer sessions and technical coordination with cybersecurity and architecture teams
