Open to opportunities

Rei De los Reyes

@reidelosreyes

Message

I build and transform enterprise security operations, automating detection, response, and risk reduction.

United States

Message

What I'm looking for

I'm looking to lead or strengthen enterprise security operations, SOC transformation, SIEM/SOAR automation, incident response, and risk-based security programs in the U.S. market.

I've led security transformation at Accenture Security and built and matured global enterprise SOC operations at Institutional Shareholder Services. I automated 60–75% of Tier 1 incidents with Google Chronicle and SOAR playbooks, reducing Mean Time to Contain by 70%.

Across 18 years in cybersecurity, I've delivered SIEM/SOAR implementations, incident response, threat hunting, vulnerability management, penetration testing, and ISO 27001-aligned security programs. I've also led multi-functional security teams, designed security architecture roadmaps, and strengthened enterprise resilience across cloud, network, application, and infrastructure environments.

Experience

Work history, roles, and key accomplishments

Security Transformation Manager

Accenture Security

Jan 2025 - Mar 2026 (1 year 2 months)

Led SOC transformation initiatives including SIEM and SOAR implementation, improving detection and response capabilities. Automated 60-75% of Tier 1 incidents using Google Chronicle and SOAR playbooks, reducing Mean Time to Contain by 70%.

SIEM SOAR Incident Response Threat Detection Security Architecture Automation

Associate Vice President

Institutional Shareholder Services

Jan 2021 - Dec 2024 (3 years 11 months)

Headed the architecture, execution, and continuous optimization of the global enterprise information security program. Spearheaded the end-to-end development and operational maturity of the enterprise-wide Security Operations Center (SOC).

Security Operations SOC Incident Response Team Leadership Risk Management ISO 27001

Senior Information Security Officer

Institutional Shareholder Services

Sep 2015 - Jan 2021 (5 years 4 months)

Oversaw the continuous administration, proactive monitoring, and lifecycle management of ISS's physical, logical, network, and critical infrastructure security. Spearheaded the corporate vulnerability management program and facilitated deep-dive risk assessments.

Vulnerability Management Risk Assessment ISMS ISO 27001 Security Monitoring Network Security

Senior Test Analyst

Automatic Data Processing

Aug 2012 - Jul 2015 (2 years 11 months)

Advanced the security posture of enterprise web applications by executing comprehensive internal and external penetration testing aligned with the OWASP Top 10 framework. Maintained continuous oversight and proactive monitoring of ADP's in-house application systems.

Penetration Testing OWASP Top 10 Vulnerability Assessment Application Security Incident Response

Lead, Information Security Implementation & Support

Aegis Peoplesupport

Nov 2010 - Aug 2012 (1 year 9 months)

Evaluated, engineered, and deployed enterprise-wide cybersecurity solutions, strengthening data protection across global platforms, databases, and network infrastructures. Spearheaded quarterly security inspections, penetration testing, and annual source code analysis.

Security Solutions Penetration Testing Source Code Analysis Policy Development Compliance