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Hi, I am David

Cybersecurity Operations & Security Engineering Leader at Enterprise Cybersecurity, Risk, and Security Engineering

Cybersecurity operations leader with 20+ years of experience across incident response, threat hunting, vulnerability management, SIEM operations, security engineering, endpoint security, firewall modernization, and executive-level cyber risk communication. Experienced leading complex security initiatives, modernizing enterprise defenses, improving visibility, and translating technical findings into clear action for senior stakeholders.

Security Operations
Vulnerability Management
Security Engineering

Skills

Experiences

1
Enterprise Cybersecurity Program

2025 - Present

Tokyo, Japan

Security engineering, risk management, vulnerability management, and operational cybersecurity support for enterprise infrastructure.

Lead Cybersecurity Engineer

2025 - Present

Responsibilities:
  • Lead cybersecurity engineering and risk-management support for enterprise network environments.
  • Organize control evidence, remediation inputs, assessment artifacts, and leadership status updates.
  • Coordinate vulnerability management and continuous monitoring using enterprise scanning, endpoint security, and configuration compliance outputs.
  • Advise program managers, network engineers, and cybersecurity stakeholders on secure architecture, compliance blockers, and operational readiness.
Cybersecurity Operations Center

2022 - 2025

Asia-Pacific

Security operations, incident response, threat hunting, SIEM engineering, and enterprise cyber defense leadership.

Senior Cybersecurity Operations Engineer

2022 - 2025

Responsibilities:
  • Led teams across threat hunting, incident response, security architecture, and risk management.
  • Analyzed large-scale security event data to identify threat activity, improve detection, and coordinate response actions.
  • Improved vulnerability management, endpoint security, and SIEM visibility across large enterprise environments.
  • Briefed senior stakeholders on operational security posture, risk trends, incident activity, and remediation progress.
2
3
Enterprise Security Services

2017 - 2020

Europe

Enterprise security services, vulnerability management, incident response support, and multinational cybersecurity operations.

Enterprise Security Service Engineer

2017 - 2020

Responsibilities:
  • Managed enterprise security services across vulnerability management, endpoint visibility, directory services, and security monitoring.
  • Supported incident response activities using SIEM, packet analysis, malware information sharing, and forensic response workflows.
  • Improved security visibility and operational readiness across geographically distributed enterprise environments.
  • Authored incident response reporting and coordinated technical findings across multiple stakeholder groups.
Cyber Defense Engineering

2015 - 2017

Asia-Pacific

Network defense, host security, threat analysis, security planning, and defensive engineering.

Cyber Defense Lead Engineer

2015 - 2017

Responsibilities:
  • Led cyber defense activities focused on network and host protection for critical enterprise systems.
  • Integrated threat indicators into defensive tooling to improve detection and reduce exposure.
  • Supported ransomware defense, access control improvements, and security hardening initiatives.
  • Developed practical security guidance, response procedures, and training materials for technical teams.
4

Education

Western Governors University
Completed
Master of Science, Cybersecurity and Information Assurance
Western Governors University
Completed
Bachelor's Degree, Cybersecurity
Community College of the Air Force
Completed
Associate of Applied Science, Information Systems Technology

Projects

Vulnerability Management Platform Rebuild
Vulnerability Management Platform Rebuild
Lead Engineer Completed

Rebuilt enterprise vulnerability scanning workflows, discovery scans, dynamic asset lists, authenticated credentials, rulesets, and compliance audit plugins, improving scan reliability and reducing manual effort.

vulnerability engineering
Details
Firewall Modernization and Attack Surface Reduction
Firewall Modernization and Attack Surface Reduction
Security Engineering Lead Completed

Led firewall modernization, traffic analysis, legacy rule cleanup, and ruleset development to improve perimeter security and reduce attack surface.

engineering network-security
Details
SIEM Visibility and Detection Dashboard Program
SIEM Visibility and Detection Dashboard Program
SIEM Engineering Lead Completed

Developed high-volume SIEM dashboards and visibility workflows to improve event analysis, operational monitoring, and detection response.

siem security-operations
Details
Endpoint Security Coverage Expansion
Endpoint Security Coverage Expansion
Endpoint Security Lead Completed

Expanded endpoint security visibility, improved rogue device detection, strengthened coverage across multiple network segments, and improved operational security reporting.

endpoint security-operations
Details
Cybersecurity Training Range and Analyst Course
Cybersecurity Training Range and Analyst Course
Course Developer / Lead Instructor Completed

Built a hands-on cybersecurity training environment and delivered practical analyst training covering traffic analysis, SIEM workflows, forensics, and threat hunting.

siem training security-operations
Details