Senior Network Security Engineer - Vulnerability & STIG Lead

Leidos Inc; Jacksonville (FL); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking a Network Engineer to lead vulnerability management and STIG compliance for NMCI network infrastructure. You will provide technical leadership, make patch deployment decisions, and ensure 72-hour SLA compliance across 40+ solution types supporting thousands of devices.

The role requires 8–12 years in network security with a active Secret clearance, strong F5/Cisco/firewall expertise, and DoD STIG experience. You will mentor engineers and report metrics to senior leadership.

Qualifications

• 8–12 years of network security and vulnerability management experience (or equivalent).
• U.S. citizen with active Secret clearance.
• Expert knowledge of F5, Cisco, firewalls, and enterprise network infrastructure.
• DoD STIG compliance and audit experience.
• Strong vendor relationship and escalation management skills.
• CISSP, CCNP, or equivalent certifications preferred.

Responsibilities

• Own vulnerability management program strategy and execution.
• Approve or reject patch deployments based on lab validation results.
• Lead quarterly STIG compliance assessments and audit preparation.
• Engage vendors (F5, Cisco, Palo Alto, etc.) at executive/technical levels for escalations.
• Mentor and develop mid-level and junior engineers.
• Report program status, risks, and metrics to senior leadership.
• Lead emergency response to zero-day vulnerabilities and critical patches.
• 72-hour patch SLA compliance (>90%).
• 100% completion of quarterly STIG assessments (160/year).
• Quality of patch approvals - accountable for production impact.
• Team performance, development, and retention.
• DoD/Navy audit readiness and compliance.

Skills

Vulnerability management

STIG compliance

Vendor escalation management

Patch management

Mentoring engineers

Education

Bachelor's degree

Tools

F5

Cisco

Palo Alto

Job description

Leidos is seeking a Network Engineer to lead vulnerability management and STIG compliance for NMCI network infrastructure. You will provide technical leadership, make patch deployment decisions, and ensure 72-hour SLA compliance across 40+ solution types supporting thousands of devices.

The role requires 8–12 years in network security with a active Secret clearance, strong F5/Cisco/firewall expertise, and DoD STIG experience. You will mentor engineers and report metrics to senior leadership.