Open to opportunities

Derrell Johnson

@johnsondd86

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Experienced cybersecurity engineer specializing in threat hunting, incident response, and SIEM automation.

United States

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What I'm looking for

I seek roles focused on threat detection, incident response, and SIEM orchestration at organizations valuing cross-team collaboration, compliance, and continuous security improvement.

I am an experienced Cybersecurity Engineer with 15 years of IT expertise designing, implementing, and managing security solutions in fast-paced environments.

I specialize in proactive threat hunting, incident response, and SIEM automation using tools such as Splunk, Palo Alto XSOAR, and Defender ATP, and I have driven measurable improvements like reducing incident resolution time by over 30%.

My hands-on experience spans vulnerability assessment, network monitoring, endpoint protection integrations, and forensic investigation, with projects that automated DDoS detection and improved endpoint isolation to minimize lateral movement risk.

I collaborate across teams to enforce compliance, strengthen data protection, and improve overall cybersecurity maturity while continuing professional development in cybersecurity and security operations certifications.

Experience

Work history, roles, and key accomplishments

Information Security Engineer

Applied Medical

Jul 2022 - Jul 2025 (3 years)

Conducted security audits, monitored firewalls, and investigated incidents via Splunk and Defender ATP, implementing proactive countermeasures that strengthened data protection and compliance across the enterprise.

Splunk Defender ATP Vulnerability Management Incident Response Auditing Threat Hunting

Cyber Security Engineer

Orlando Health

Jul 2019 - Jul 2022 (3 years)

Led incident response and forensic investigations using Splunk, Wildfire, and XSOAR, performed vulnerability management, and engineered Palo Alto firewall and host intrusion defenses to secure hybrid environments.

Splunk XSOAR Wildfire Vulnerability Assessment Incident Response Forensics HIDS

Help Desk Analyst

Westgate Resorts

Sep 2016 - Dec 2020 (4 years 3 months)

Provided IT support and troubleshooting across multiple corporate sites, resolving user issues and maintaining IT service continuity for desktop and enterprise applications.

Desktop Support Troubleshooting ServiceNow ITSM User Support Incident Management Remote Support

Desktop Support Analyst

GLE Scrap Metal

Mar 2018 - Jul 2019 (1 year 4 months)

Installed and configured IT systems, cabling, and security cameras to improve network reliability and on-site operational uptime.

CCTV Configuration IT Support System Configuration Troubleshooting Endpoint management

Education

Degrees, certifications, and relevant coursework

San Diego City College

Bachelor of Science, Cybersecurity

Pursuing a Bachelor of Science in Cybersecurity to develop advanced skills in threat detection, incident response, and security architecture.

Florida Technical College

Associate of Science, Network Administration

Completed an Associate of Science in Network Administration focusing on network management, system administration, and foundational IT support skills.