Assigned Recruiter(s) Suchitra Garikapati Date Opened 09/17/2026 Country Spain Job Posting ID ZR_4444_JOB What is the mission about?

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At NextLink, we are looking for a

Senior Security Engineer (SIEM)

to join our team and collaborate closely with one of our most recognized clients in the pharmaceutical sector.

You will join the Cyber Intelligence & Security Operations Center (CISOC) team, focusing on security monitoring and detection capabilities through SIEM/XDR technologies.

The role combines hands‑on security engineering, use case development, automation, detection improvement, reporting, and collaboration with Security Detection, Incident Response, Risk, and Information Security teams.

Main Responsibilities

Design, implement, and continuously improve SIEM/XDR security use cases, including fine-tuning to reduce false positives.

Develop and maintain scripts, integrations, and APIs to enrich SIEM/XDR capabilities and automate security monitoring activities.

Support the implementation and maintenance of simulated threats / BAS scenarios to test and improve detection use cases.

Contribute to the evolution of security technologies in line with the defined roadmap and improve detection capabilities together with Security Detection and Incident Response teams.

Act as a point of contact for security monitoring reports and dashboards, presenting status and updates to technical experts and management.

Follow defined frameworks,



processes, SOPs, and working instructions, ensuring compliant and up-to-date documentation.

Collaborate with Risk and Information Security teams on identified risks, remediation, prioritisation, analysis, triage, and security monitoring improvements.

Requirements

Proven hands‑on experience with SIEM/XDR technologies and security monitoring/detection activities.

Experience developing and fine‑tuning security detection use cases, ideally with technologies such as Microsoft Sentinel or Microsoft Defender.

Programming/scripting experience with Python, PowerShell, Bash, or similar, including API integrations.

Good understanding of security weaknesses, remediation processes, prioritization, change management, analysis, and triage.

Strong analytical thinking, problem-solving, communication, teamwork, agility, and results‑oriented skills.

Excellent spoken and written English.

Experience working in virtual, international, and multicultural environments.

Experience with Breach & Attack Simulation (BAS) and simulated threat creation.

Experience with reporting and ticketing platforms such as ServiceNow.

Relevant SIEM/XDR certifications, particularly related to Microsoft Sentinel or Microsoft Defender, are a plus.

Security certifications such as Security+, CE, GCIH, ECIH, OSCP, or CEH are desirable but not mandatory.

📌 Senior Security Engineer (SIEM) (Madrid)
🏢 Nextlink Group
📍 Madrid