Mid-Level Transport Network Engineer

Leidos LLC; Washington (District of Columbia); On-site; USD 64,000 - 107,000; Full time

Job summary

Leidos is seeking a Network Engineer to execute patch testing, STIG compliance assessments, and lab validation for assigned network infrastructure domains.

You will work independently with minimal oversight, build and maintain lab environments, document results, and provide deployment recommendations while mentoring junior engineers and ensuring timely, accurate patch guidance.

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.

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 experience

US Citizen

Secret clearance

Troubleshooting

CCNA / Security+

Education

B.S. Degree

Tools

F5

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.

What 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

The Leidos pay range for this job level is a general guideline only and 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.

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 $17.2 billion for the fiscal year ended January 2, 2026.

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 here.

Securing Your Data

Leidos will never ask you to provide payment‑related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment‑related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.