Security Architect (SIEM & IR Security Engineering) - Rakuten-CERT Section, Cyber Security Defense Department (CSDD)
Core
Define security blueprints, architectural standards, and governance models for the SIEM/Incident Response team to reduce noise and increase signal in global security operations.
Role type
Senior Security Architect (SIEM & IR focus)
Builds
Security architectural standards, governance models, and design patterns for the Rakuten ecosystem
Domain
Cybersecurity, Cloud Infrastructure, Enterprise Security Operations (via careerplan.io/jobs/1038513-65-security-architect-siem-ir-security-engineering-rakuten-cert-section-cyber-security-defens)
Required skills
Security architecture design, SDLC integration, Zero Trust patterns, SIEM/IR operational knowledge, NIST/CIS/ISO 27001 frameworks, Cloud governance (AWS/GCP/Azure), MITRE ATT&CK translation, Strategic stakeholder influence
Preferred skills
CISSP/CISM certifications, Japanese language proficiency
Technologies
AWS, GCP, Azure, MITRE ATT&CK, NIST, CIS, ISO 27001
Responsibilities
Develop and maintain technical security standards and policies; Lead security requirements and design reviews for new projects; Collaborate with SIEM & Incident Response teams to translate threat data into architectural changes; Mentor junior staff and build consensus on security roadmaps; Drive integration of modern security patterns (Zero Trust, DevSecOps) into the SDLC; Update organizational security policies based on IR playbook findings
Seniority
Senior, hands-on IC with leadership aspirations
