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Senior IT Operational Security Administrator – CDI

Company: Nomura Bank (Luxembourg) S.A.

Location: Hesperange, London

Posted: May 30, 2026

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Position Details

The Department acts as IT first line of defense, and is responsible of administration and setup of the internal and external security systems, and network infrastructure.

In order to support our team, we are looking for a Senior IT Operational Security Administrator on a permanent contract. 

 

Key Responsibilities:

  • Perform operational tasks related to security equipment maintenance and compliance control implementation

  • Administer and maintain enterprise security infrastructure including antivirus, firewalls, load balancers, email/web gateways, and related systems

  • Coordinate incident response follow-ups

  • Implement and maintain system hardening measures across the infrastructure

  • Monitor and respond to security alerts raised by SIEM, SOC, and other monitoring/alerting systems, ensuring proactive threat detection and timely remediation

  • Oversee vulnerability management program...