Senior Network Security Engineer — Vulnerability & STIG

Leidos; Washington (District of Columbia); 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 authoritative patch deployment decisions, and ensure 72-hour SLA compliance across 40+ solution types supporting thousands of production devices.

Ideal candidates bring 8–12 years of network security experience, DoD STIG expertise, and active Secret clearance.

Qualifications

• B.S. degree and 8–12 years of network security and vulnerability management experience.
• U.S. Citizen with an active Secret clearance.
• Expert knowledge of F5, Cisco, firewalls and enterprise network infrastructure.
• DoD STIG compliance and audit experience.
• 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 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.
• Ensure 72-hour patch SLA compliance and 160 quarterly STIG assessments.

Skills

Vulnerability management

Network security

Patch deployment

Vendor escalation

Mentoring

Education

Bachelor’s degree or equivalent experience

Tools

F5

Cisco

Firewalls

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 authoritative patch deployment decisions, and ensure 72-hour SLA compliance across 40+ solution types supporting thousands of production devices.

Ideal candidates bring 8–12 years of network security experience, DoD STIG expertise, and active Secret clearance.