09/19/2025 updated
100 % available
Senior Cyber Security Engineer with F5 BIG-IP ASM and OWASP Expertise
Tokyo, Japan
Only remote
Master of Science (MSc), Cyber SecurityAmazon Web ServicesApplication FirewallAuthenticationsCommand-Line InterfaceComputer SecurityMulti-Factor AuthenticationIncident ResponseHealth Insurance Portability and Accountability Act (HIPAA) ComplianceISO/IEC 27001OWASPPublic Key InfrastructureWeb Application SecuritySystem SafetyVulnerability ManagementTransport Layer Security
Web Application Firewall Management
F5 BIG-IP ASM implementation and management for enterprise-level web application security, protecting over 1000+ applications across diverse industries.
Vulnerability Management
OWASP Top 10 mitigation expertise with proven track record of reducing active client vulnerabilities by 90% through directed mitigation programs.
Security Compliance
Experience with HIPAA & ISO/IEC 27001 compliance preparation, supporting international clients across multiple regulatory frameworks.
Incident Response
P1/P2 incident response coordination during on-call rotations, resolving outages independently and through cross-team collaboration.
Security Monitoring
Implementation of Splunk, AWS, CLI, and Site24x7 for daily monitoring, troubleshooting, and false positive remediation.
Certificate Management
SSL/TLS certificates and public/private key infrastructure management, including DigiCert, Entrust, Let's Encrypt, and ACM deployments.
Authentication Systems
Implementation of no-touch two-factor authentication tools to enhance client system security.
F5 BIG-IP ASM implementation and management for enterprise-level web application security, protecting over 1000+ applications across diverse industries.
Vulnerability Management
OWASP Top 10 mitigation expertise with proven track record of reducing active client vulnerabilities by 90% through directed mitigation programs.
Security Compliance
Experience with HIPAA & ISO/IEC 27001 compliance preparation, supporting international clients across multiple regulatory frameworks.
Incident Response
P1/P2 incident response coordination during on-call rotations, resolving outages independently and through cross-team collaboration.
Security Monitoring
Implementation of Splunk, AWS, CLI, and Site24x7 for daily monitoring, troubleshooting, and false positive remediation.
Certificate Management
SSL/TLS certificates and public/private key infrastructure management, including DigiCert, Entrust, Let's Encrypt, and ACM deployments.
Authentication Systems
Implementation of no-touch two-factor authentication tools to enhance client system security.
Experience
Professional experience5 - 10 years
Freelancer since2025
Languages
EnglishNative speaker
Project history
Leading security operations for key client accounts with 300+ active web applications, serving as project manager for international clients, partnering with government agencies during U.S. election cycles, and directing vulnerability mitigation programs that reduced vulnerabilities by 90%.
Deployed 1000+ web applications across 100+ clients using F5 BIG-IP ASM and Ansible, managed SSL/TLS certificates, leveraged monitoring tools, developed iRules to mitigate HTTP vulnerabilities, and implemented two-factor authentication.
Assisted in HIPAA & ISO/IEC 27001 compliance preparation, conducted risk assessment of approved software applications, and produced database reports to identify and reduce system-wide security vulnerabilities.