Kazuki Yoshio
Tokyo,13
Summary
Accomplished Security Engineer with strengths in identity access management, single sign-on integration, and identity lifecycle management. Proven track record of driving successful system implementations by ensuring stability through rigorous validation and testing, resolving complex issues, and enabling sustainable operations through effective support and skill transfer.
Overview
3
3
years of professional experience
1
1
Certification
Work History
Security Engineer
Kyndryl Japan
Minato-ku
04.2022 - Current
- Identity Architecture & Migration: Designed the identity management architecture to replace the legacy authentication system with Okta; contributed to system build, integration testing, migration execution, and operational support.
- Access Policies: Designed, configured, and validated Okta authentication policies to enforce secure access controls.
- Single Sign-On (SSO) Enablement: Designed, implemented, and tested SSO integrations for SaaS applications using SAML and OIDC. Designed, implemented, and tested SSO integrations for legacy applications through reverse proxy integration with Okta Access Gateway.
- Log Management Automation: Designed and developed an automated logging solution leveraging the Okta System Log API, implemented in Python, to archive logs to on-premises log servers, and testing and release deployment.
- Performance & Load Testing: Designed and executed authentication access load tests to validate that the Okta Access Gateway and load balancer could sustain required performance levels, and ensured stable operations post-release.
- Operational Support & Knowledge Transfer: Authored detailed operational runbooks, and delivered skill-transfer sessions to operations teams to ensure a smooth handover and sustainable management.
- Architecture & Requirements Definition: Defined the overall Zero Trust architecture and customer requirements in a large-scale enterprise program (Microsoft E5 Security & Compliance), acting as a security architect.
- Proof of Concept & Solution Design: Conducted PoC and established solution design principles to integrate Microsoft E5 Security & Compliance.
Education
Bachelor of Arts - Economics
Waseda University
Tokyo03-2022
Skills
- Identity access management
- Identity life cycle management
- Access policy design
- Single sign-on integration
- Log management automation
- Load testing
- Operational support and training
- Zero Trust architecture design
- Problem solving
- Effective communication
Languages
Japanese
First Language
English
Upper Intermediate (B2)
B2
Affiliations
- Nov 2022: Participated in Kyndryl internal application development tasks; presented at a company-wide event as a team leader.
- Jan 2025: Attended the Security Engineering Event at Microsoft headquarters in Seattle.
- Jul 2025: Selected as a Japan representative to participate in the Kyndryl Consult Academy training program in the U.S.
- Aug 2025: Completed the AI SecOps training course at DEF CON 33 in Las Vegas.
Accomplishments
- Feb 2025: Passed internal Profession evaluation and achieved Staff Technical Specialist (team leader level).
Certification
- Microsoft Certified: Azure Fundamentals (AZ-900) – Jun 2022
- Microsoft Certified: Security, Compliance, and Identity Fundamentals (SC-900) – Jun 2022
- Microsoft Certified: Identity and Access Administrator Associate (SC-300) – Jul 2022
- AWS Certified Cloud Practitioner (Fundamentals) – Aug 2022
- AWS Certified Developer – Associate – Mar 2023
- Okta Certified Professional – Jun 2023
- Okta Certified Administrator – Jan 2024
- CompTIA Security+ ce – Apr 2024
- Okta Certified Consultant – Jun 2024
- Okta Certified Developer – Feb 2025
Timeline
Security Engineer
Kyndryl Japan
04.2022 - Current
Bachelor of Arts - Economics
Waseda University
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