Mid-Level Transport Network Engineer

Leidos; Arlington (VA); On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos is seeking a Network Engineer to execute patch testing in lab environments, perform STIG compliance assessments, and validate network infrastructure. You will work independently to meet a 72-hour SLA, build and maintain labs, document results, and provide deployment recommendations.

Requirements include a B.S. degree (or equivalent experience), U.S. citizenship with an active Secret clearance, and hands-on experience with F5, Cisco, or Palo Alto. CCNA/Security+ are expected certifications.

Qualifications

• Requires a B.S. Degree and 2-4 years network engineering experience (routing, switching, load balancing, firewalls).
• U.S. Citizenship and active Secret clearance required.
• 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.

Responsibilities

• Execute 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 SME on 10-15 solution types.
• Test 80-100 patches/year in assigned domain (30-35% of workload).
• Complete 50-60 STIG assessments/year.
• Maintain lab availability and readiness for assigned solution types.
• Provide accurate patch recommendations to minimize false positives/negatives.
• Knowledge transfer through documentation and mentorship.

Skills

U.S. Citizenship

Active Secret Clearance

Routing

Switching

Load Balancing

Firewalls

Troubleshooting

Root Cause Analysis

Education

Bachelor's degree

Tools

F5

Cisco

Palo Alto

CCNA

Security+

Job description

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.

• 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

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.