Open to opportunities

Juan Sergio

@juansergio

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CISM-certified cybersecurity leader specializing in incident response, risk management, and cyber defense.

United States

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What I'm looking for

I seek senior cybersecurity roles where I can lead incident response, develop risk-reduction programs, mentor teams, and implement pragmatic defenses in mission-driven organizations.

I am a CISM-certified cybersecurity professional and recently retired U.S. Navy Reservist with 10+ years protecting sensitive systems across military and corporate environments. I lead cross-functional teams, develop IR playbooks, and align technical defense strategies with operational goals.

My background includes senior roles in cyber analysis, investigations, and EKMS/COMSEC management where I managed incident response, vulnerability assessments, and major network projects using tools like Splunk, ArcSight, and XSOAR. I maintain active professional certifications and continuous upskilling in emerging threats and cloud technologies.

I deliver measurable risk reduction through policy development, tabletop exercises, and practical cyber defense implementations, and I am committed to driving security programs that minimize business disruption while ensuring compliance.

Experience

Work history, roles, and key accomplishments

Senior Cybersecurity Analyst

U.S. Navy Reserve – NIOC Georgia

Jul 2025 - Feb 2026 (7 months)

Directed a 16-person administrative department and augmented command IT cybersecurity operations, improving unit security posture and supporting honorable military retirement. Maintained CISM credentials and analyzed emerging AI threat vectors to inform defensive posture.

Incident Response Risk Management Playbook Development Team Leadership Splunk XSOAR Policy Development

Senior Information Security Officer

Popular Bank North America

Jan 2023 - May 2025 (2 years 4 months)

Led cybersecurity assessments and updated incident response strategies, designed cyber playbooks, and ran tabletop exercises to reduce organizational threats and ensure regulatory compliance. Managed incident response to minimize client impact.

Risk Assessment Incident Response Design Playbook Tabletop Exercises Splunk ArcSight Regulatory Compliance

Senior Cyber Security Analyst

United States Central Command

Aug 2019 - Dec 2022 (3 years 4 months)

Led a team of analysts in network traffic analysis and incident response using IDS/IPS, Splunk, ArcSight, and XSOAR; developed detection strategies and playbooks and served as liaison to the Tier 3 Hunt Team for critical escalations.

Network Analysis Incident Response Splunk ArcSight XSOAR Detection Engineering Team Leadership Threat Hunting

Security Specialist

Department of Defense – U.S. Navy

Dec 2014 - Dec 2018 (4 years)

Identified vulnerabilities and implemented controls for classified data, managed COMSEC procurement/distribution, and authored SOPs, EAPs, and training while leading a major network upgrade using Microsoft Project.

COMSEC Management Policy Development Project Management Microsoft Project Vulnerability Assessment Classified Data Protection

Security Analyst

Freedom Medical & Wholesales, Inc.

Jun 2009 - Nov 2014 (5 years 5 months)

Administered network infrastructure, monitored security alerts via firewalls and IDS, and conducted internal vulnerability investigations, producing executive reports and weekly security findings.

Network Administration Vulnerability Assessment Reporting Routers