Senior Cyber Security Specialist

Are you ready to protect the future of digital infrastructure? We’re looking for a

Senior Cyber Security Specialist

to join a global team building resilient and scalable cyber defense systems. You’ll be part of an international unit focused on SIEM operations, currently migrating to Elastic as the new reference platform for security.

Key responsibilities : Plan, install, configure, and operate complex cybersecurity systems. Support teammates in error analysis and troubleshooting. Manage SIEM platforms such as Elastic, QRadar, Azure Sentinel, and XDR. Maintain system lifecycle : patching, updates, and vulnerability mitigation. Document changes in the internal knowledge base. Participate in international projects, leading subprojects or workflows when needed. Adapt services to evolving IT landscapes and cloud readiness. Participate in on-call rotations (1 week every 5–7 weeks, average 1 call every 2 months).

Tech stack & must-haves : Degree in Computer Science, IT Engineering, or a related technical field. 5+ years of experience in cybersecurity systems (SIEM). 3+ years working with Elastic (SIEM / Observability / XDR). Experience with QRadar, Azure Sentinel, or Splunk. Basic Python knowledge. Fluent English (C1 level).

Nice to have : Experience in Data Center environments. Familiarity with OTRS and StackStorm. Project management and stakeholder coordination skills.

What we offer : Sponsorship to work in Spain and relocation to Madrid. Competitive salary package (base + bonus). Career growth and training opportunities.