Senior Security Engineer (SIEM)

• 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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Job Description

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.

• 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.