John Adrian Esteban
Security Researcher
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About
Software Engineer building a security-focused career, applying production incident response, root-cause analysis, and automation skills to defend enterprise systems. Proven in managing 30-50+ technical incidents weekly under SLA pressure and reducing repeat issues by 20% through targeted fixes. Hands-on threat detection experience via SIEM log investigation, security labs, and CompTIA Security+ certification. Eager to apply a developer's mindset toward proactive security monitoring and defense.
Experience
Associate Software Engineer at Accenture (2023-10 – 2026-02)
Full-time role focused on incident response and root-cause analysis for application issues with high-pressure ticket management.
- Performed incident response and root-cause analysis for application issues, reducing repeat incidents by 20% through targeted fixes, demonstrating a foundational understanding of the security incident lifecycle.
- Managed 30–50+ incident tickets weekly with a 90% SLA resolution rate, developing proficiency in high-pressure troubleshooting, ticket documentation, and stakeholder communication—core skills for a SOC Tier 1 analyst.
- Authored 20+ technical documents (incident reports, runbooks), improving team preparedness and response consistency, a direct parallel to SOC playbook development.
- Identified and mitigated process gaps that led to manual errors, recommending and implementing controls that increased operational accuracy by 15-25%, showcasing a risk reduction mindset.
IT Support Intern at BryanDSI (2023-03 – 2023-06)
Internship providing technical support to end-users and assisting with IT operations including user access management and network configuration.
- Provided technical support to end-users by troubleshooting hardware, software, and network issues, achieving a 90% first-contact resolution rate.
- Assisted with user access management and completed 100+ password resets and provisioning requests while ensuring security compliance.
- Configured and managed networks and routers, including setting up secure Wi-Fi, managing IP allocations, and monitoring network performance, resulting in stable connectivity and optimized bandwidth usage across the office.
Education
BS in Information Technology in Information Security – University of the East (2019 – 2023)
