Mid-Level Transport Network Engineer

Leidos; Jacksonville (FL); On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos in the United States is seeking a Network Engineer to execute patch testing, STIG compliance assessments, and lab validation for the assigned network infrastructure domain. You will work independently with minimal oversight to ensure thorough testing and accurate recommendations supporting the 72-hour SLA, while building and maintaining lab environments and documenting results.

The role requires a US citizenship and an active Secret clearance, experience with F5, Cisco, and Palo Alto

Qualifications

• Requires a B.S. Degree with 2–4 years of network engineering experience.
• U.S. Citizen with an active Secret clearance.
• Hands-on experience with F5, Cisco, Palo Alto, or similar platforms.
• STIG compliance and vulnerability management experience.
• CCNA, Security+ or equivalent certifications required.

Responsibilities

• Execute comprehensive patch testing in lab environments (standalone, HA, stacks).
• Perform quarterly STIG compliance scans and assessments.
• Build and maintain lab environments (virtual and hardware).
• Document test results and provide deployment recommendations.
• Troubleshoot patch failures and coordinate with vendors.
• Supervise and mentor junior engineer on testing activities.
• Maintain subject matter expertise on 10-15 solution types.
• Test 80-100 patches/year in assigned domain (30-35% of team workload).
• Complete 50-60 STIG assessments/year.
• Maintain lab availability and readiness for assigned solution types.
• Accurate patch recommendations - minimize false positives/negatives.
• Knowledge transfer through documentation and mentorship.

Skills

Network engineering

STIG compliance

Troubleshooting

Citizenship: US

Active Secret clearance

Education

Bachelor's degree in a relevant field

Tools

F5 BIG-IP

Cisco

Palo Alto

Job description

More About the Role

Leidos is seeking a Network Engineer execute patch testing, STIG compliance assessments, and lab validation for assigned network infrastructure domain. Work independently with minimal oversight to ensure thorough testing and accurate recommendations supporting 72-hour SLA.

Description

Leidos is seeking a Network Engineer execute patch testing, STIG compliance assessments, and lab validation for assigned network infrastructure domain. Work independently with minimal oversight to ensure thorough testing and accurate recommendations supporting 72-hour SLA.

You'll Get To Do

• Execute comprehensive patch testing in lab environments (standalone, HA, stacks).
• Perform quarterly STIG compliance scans and assessments.
• Build and maintain lab environments (virtual and hardware).
• Document test results and provide deployment recommendations.
• Troubleshoot patch failures and coordinate with vendors.
• Supervise and mentor junior engineer on testing activities.
• Maintain subject matter expertise on 10-15 solution types.
• Test 80-100 patches/year in assigned domain (30-35% of team workload).
• Complete 50-60 STIG assessments/year.
• Maintain lab availability and readiness for assigned solution types.
• Accurate patch recommendations - minimize false positives/negatives.
• Knowledge transfer through documentation and mentorship.

You'll Bring These Qualifications

• Requires B.S. Degree and 2-4 years network engineering experience (routing, switching, load balancing, firewalls); years of experience can be in lieu of degree.
• Must be a U.S. Citizen and possess an active Secret clearance.
• Hands-on experience with F5, Cisco, Palo Alto, or similar platforms.
• STIG compliance and vulnerability management experience.
• Strong troubleshooting and root cause analysis skills.
• CCNA, Security+, or equivalent certifications required.

NGEN

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting

August 1, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $59,150.00 - $106,925.00

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay And Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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