Senior Cyber Defense Engineer: AI-Powered SIEM & IR

TD SYNNEX Co.; Barcelona; On-site; EUR 90,000 - 120,000; Full time

Job summary

TD SYNNEX seeks a Senior Cyber Security Specialist to design, implement and manage security technology solutions globally. The role leads as a technical resource across SIEM, SOAR, AI/ML integrations and threat intelligence to strengthen protection, detection, and response capabilities.

You will collaborate with security automation engineers to build detection rules, playbooks and runbooks, while mentoring teams and ensuring best practices across on-premise and cloud environments.

Qualifications

• Bachelor’s Degree in IT field required.
• 8–10 years of relevant work experience.
• 5+ years in security engineering with cross-domain experience (SIEM + SOAR or SIEM + Detection).
• Proficiency in SIEM query languages (SPL, KQL) and SOAR playbook development (Python, low-code platforms).
• Experience building or integrating AI/ML models for security use cases.
• Strong Python skills with ML frameworks and LLM APIs.
• Detection engineering experience: Sigma rules, MITRE ATT&CK mapping, rule tuning methodology.
• Git-based workflow proficiency for detection-as-code and infrastructure-as-code.
• Security certifications or equivalent proven work experience.
• Ability to communicate clearly and work with stakeholders across levels.

Responsibilities

• Technical design, implementation, enhancement and ongoing support for security technologies (30%).
• Executes and improves core security processes such as vulnerability management, threat analysis, security monitoring and incident response.
• AppSec reviews, penetration testing and red teaming activities to identify gaps and improve detection capabilities.
• Process automation and orchestration to improve team efficiency, documentation and training.
• Data analytics and KPI reporting for operational effectiveness and controls health.
• Collects and analyzes security data to support investigations and mitigation efforts.

Skills

SIEM

SOAR

Python

AI/ML in security

Sigma rules

MITRE ATT&CK

Git

Detection engineering

KQL

SPL

Low-code platforms

Education

Bachelor’s Degree in IT field

Security certifications

Job description

TD SYNNEX seeks a Senior Cyber Security Specialist to design, implement and manage security technology solutions globally. The role leads as a technical resource across SIEM, SOAR, AI/ML integrations and threat intelligence to strengthen protection, detection, and response capabilities.

You will collaborate with security automation engineers to build detection rules, playbooks and runbooks, while mentoring teams and ensuring best practices across on-premise and cloud environments.