Updated for 2026

Senior Security Engineer
Resume Example

A proven resume structure for experienced security engineering roles that showcases vulnerability management, incident response leadership, and security architecture at scale.

ATS Score
91
Excellent
Keywords · Impact · Format
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Victor Okonkwo

Washington, DC  |  [email protected]  |  (555) 202-7461  |  linkedin.com/in/victorokonkwo
Summary

Senior security engineer with 7 years of experience designing and implementing security architectures protecting $2.4B in annual transaction volume. Identified and remediated 1,200+ vulnerabilities across cloud and on-premise environments while reducing mean time to respond to incidents from 4 hours to 35 minutes. CISSP and AWS Security Specialty certified with deep expertise in zero-trust architecture and DevSecOps.

Technical Skills
Security: Penetration testing, vulnerability management, SIEM (Splunk, Sentinel), EDR (CrowdStrike), WAF, DLP, zero-trust architecture
Cloud Security: AWS Security Hub, Azure Defender, IAM policy design, CloudTrail, GuardDuty, container security (Trivy, Falco)
DevSecOps & Compliance: OWASP, NIST 800-53, SOC 2, PCI-DSS, Terraform (security modules), GitHub Advanced Security, SonarQube
Experience
Senior Security Engineer - Ironclad Systems
  • Designed zero-trust security architecture protecting 280 microservices and $2.4B in annual payment transactions, reducing unauthorized access attempts by 94%
  • Identified and remediated 840+ vulnerabilities through quarterly penetration tests and continuous scanning, with 100% of critical findings resolved within 72 hours SLA
  • Built automated security pipeline integrating SAST, DAST, and container scanning into CI/CD, catching 156 vulnerabilities pre-production and preventing 12 potential incidents
  • Reduced mean time to respond (MTTR) to security incidents from 4 hours to 35 minutes by implementing automated playbooks in Splunk SOAR, handling 320+ incidents annually
Security Engineer - ClearPath Financial
  • Managed vulnerability scanning program across 1,400 endpoints using Qualys, reducing average remediation time from 45 days to 12 days for critical vulnerabilities
  • Led incident response for 85 security events over 3 years, containing 100% of incidents within established SLAs and preventing data exfiltration in all cases
  • Implemented AWS IAM least-privilege policies across 14 accounts, reducing over-permissioned roles by 78% and passing PCI-DSS audit with zero findings
  • Deployed CrowdStrike EDR across 2,200 endpoints, detecting and blocking 340 malware attempts in the first year with zero false-negative escapes
Education
B.S. in Cybersecurity - George Mason University
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Why This Resume Works

1
Business Value Quantified

Protecting $2.4B in transactions immediately communicates the stakes involved, showing the candidate operates at a level where security directly impacts revenue and trust.

2
Proactive and Reactive Skills Balanced

The resume shows both vulnerability prevention (1,200+ found, DevSecOps pipeline) and incident response (320+ handled, MTTR reduced), covering the full security engineering scope.

3
Certifications Reinforce Credibility

CISSP and AWS Security Specialty certifications mentioned in the summary provide immediate validation that complements the hands-on experience described in bullets.

Section-by-Section Breakdown

Summary

Lead with your strongest business protection metric (transaction volume, users protected, data secured), then mention certifications like CISSP, OSCP, or AWS Security Specialty upfront.

Skills

Organize into Security, Cloud Security, and DevSecOps/Compliance categories. Include specific tool names (Splunk, CrowdStrike, Qualys) since ATS filters scan for exact product names.

Experience

Security metrics that resonate: vulnerabilities found and remediated, MTTR improvements, incidents handled, SLA compliance rates, and audit results. Every bullet needs a number.

Education

Certifications matter more than degrees in security engineering. CISSP, OSCP, CEH, and cloud security certifications should be prominently displayed.

Key Skills for Senior Security Engineer Resumes

Based on analysis of thousands of job postings, these are the most frequently required skills:

Penetration Testing Vulnerability Management Zero-Trust Architecture SIEM (Splunk) Incident Response Cloud Security (AWS/Azure) DevSecOps IAM & Access Control EDR (CrowdStrike) Container Security NIST & SOC 2 Compliance PCI-DSS Security Automation Threat Modeling WAF & DLP CISSP Certified

Common Mistakes on Senior Security Engineer Resumes

  • No Vulnerability Counts - Security engineers are measured by what they find and fix. Not including the number of vulnerabilities identified, remediated, or prevented leaves recruiters without your core value proposition.
  • Missing Incident Response Metrics - MTTR, incidents handled, and containment rates are critical metrics. Saying 'responded to security incidents' without numbers is too vague for senior roles.
  • Ignoring Compliance Frameworks - Most security roles require compliance experience. Not mentioning SOC 2, PCI-DSS, HIPAA, or NIST frameworks suggests you work in isolation from organizational governance.
  • No Cloud Security Experience - With most infrastructure now in the cloud, a security resume without AWS Security Hub, Azure Defender, or IAM policy experience appears incomplete for modern security teams.
  • Listing Tools Without Outcomes - Writing 'used Splunk for monitoring' without specifying what you detected, how many incidents you handled, or what improvements you drove wastes valuable resume space.

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