Stephen Portillo
Cyber Security Analyst
San Antonio
Summary
Results-driven IT professional with hands-on experience in cybersecurity operations, incident response, and vulnerability remediation. Skilled in endpoint isolation, network security, SIEM analysis, and access management. Currently pursuing a BS in Cyber Security & Information Assurance at WGU and holding multiple industry certifications. Committed to advancing organizational security posture through threat detection, ethical hacking, and risk mitigation.
Overview
3
3
years of professional experience
4
4
Certifications
Work History
Cyber Security Analyst
Bridgehead IT
09.2024 - Current
- Performed regular reviews of user access rights, minimizing the risk posed by insider threats or compromised accounts.
- Analyzed security incidents post-resolution, identifying areas for improvement in both technical controls and incident response processes.
- Reduced risk of cyber attacks by conducting regular vulnerability assessments and penetration testing.
- Enhanced network security by implementing advanced threat detection and prevention systems.
- Monitor and analyze security alerts and telemetry to identify and respond to cybersecurity threats, vulnerabilities, and incidents.
- Execute endpoint isolation, incident triage, and forensic analysis, leveraging security toolsets such as SIEM, EDR, and vulnerability management platforms.
- Developed and refined KQL queries and scripts to support proactive threat hunting and security reporting for internal and client environments.
- Collaborate with IT staff, clients, and senior analysts to strengthen security posture, remediate risks, and document incident response activities.
- Train and mentor peers on security awareness, device hardening, and compliance with organizational security policies.
Associate IS Technician - ASK IT Tech Help Desk
Providence Health St. Joseph
09.2022 - 09.2024
- Successfully resolved 1,556 tickets within Service Now platform, ensuring timely resolution of technical issues and optimizing operational efficiency.
- Performed Security Checks to verify users and diagnose tickets for malicious viruses or attempts
- Maintained stringent quality assurance standards and consistently exceeded customer satisfaction objectives.
- Conducted intricate mechanical alignments and calibrated equipment to exacting quality standards, enhancing overall system performance
- Produced comprehensive job reports and logs promptly following service calls, ensuring accurate documentation and accountability.
- Proficiently troubleshooted Group Policy Objects (GPO) and rules within Active Directory (AD), as well as Microsoft Authenticator and other Multi-Factor Authentication (MFA) applications, providing invaluable support to employees.
Computer User Support Specialist
ACI Learning
07.2022 - 09.2022
- Installed and supported Windows OS including command line & client support while troubleshooting devices and resolving network issues
- Ensured physical security & common attacks while securing a wired and wireless local network
- Detected various types of compromises and have understanding of penetration testing and vulnerability scanning.
Education
Bachelor of Science - Cyber Security & Information Assurance
Western Governors University
10.2024
Technical School - Information Technology
ACI Learning
Skills
Emergency Incident Detection & Response
Threat Intelligence Analysis
Security Information & Event Management (SIEM)
Endpoint Detection & Response (EDR)
MS O365
Firewall & Intrusion Prevention Configuration
undefinedCertification
IITIL 4 Foundations
Timeline
CompTIA Sec +
06-2025
CompTIA Net +
02-2025
CompTIA A+
10-2024
Cyber Security Analyst
Bridgehead IT
09.2024 - Current
IITIL 4 Foundations
03-2023
Associate IS Technician - ASK IT Tech Help Desk
Providence Health St. Joseph
09.2022 - 09.2024
Computer User Support Specialist
ACI Learning
07.2022 - 09.2022
Technical School - Information Technology
ACI Learning
Bachelor of Science - Cyber Security & Information Assurance
Western Governors University
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