Senior Network Engineer

Senior Network Engineer Leidos – National Security Sector | Cyber & Analytics Business Area Make an Impact Where It Matters Most Leidos is seeking a Senior Network Engineer to join our elite team supporting mission-critical national security programs. In this role, you’ll work at the forefront of cybersecurity, network engineering, and advanced analytics—helping defend and enable some of the nation’s most vital operations. Our Cyber & Analytics Business Area (CABA) brings together experts in Security Engineering, Computer Network Operations (CNO), SIGINT, Mission Software, and Cryptographic Key Management . If you’re looking for meaningful work, cutting-edge challenges, and a team that values innovation and expertise—you’ll find it here. Why Join Leidos? We believe great work starts with supporting our people. That’s why we offer: Competitive compensation & 401(k) with 6% match (immediate vesting)

Generous PTO + 11 paid holidays

Flexible work schedules (no travel required for this role)

Paid parental leave

Education, training, and certification support

Technical upskilling & career growth opportunities

Employee stock purchase plan

At Leidos, your growth is part of our mission. What You’ll Do As a Senior Network Engineer, you’ll play a key role on a high-visibility, fast-paced program supporting multiple organizations from a centralized environment. You’ll tackle complex challenges, influence network strategy, and mentor the next generation of engineers. Your responsibilities will include: Leading advanced network troubleshooting and problem resolution

Analyzing and optimizing network performance, latency, and throughput

Designing and implementing scalable, secure network architectures

Working with technologies such as: Routing protocols & BGP

Policy-based routing & traffic shaping

IPSec tunneling & NAT

Firewalls, load balancing, and WAN optimization

Evaluating and integrating emerging networking technologies

Collaborating with cross-functional teams to deliver mission-driven solutions

Mentoring junior engineers (Levels 0–2) and ensuring engineering excellence

What You Bring 12–15 years of network engineering experience (or equivalent expertise)

Bachelor’s degree in a technical field (or 5 additional years of experience in lieu of degree)

Strong experience in network design, optimization, and security

CCNA and CCNP certifications required

Proven ability to lead technical efforts and mentor teams

Security Clearance Requirement: Active TS/SCI with Polygraph (required)

Why This Role Stands Out Work on a mission-critical program with real-world impact

Join a tight-knit, highly skilled team in a collaborative environment

Gain exposure to advanced technologies and high-level decision-making

Enjoy stability, growth, and purpose —all in one role

Ready to take your career to the next level? Join Leidos and help shape the future of national security. 👉 Apply today at careers.leidos.com

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: May 4, 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 $116,350.00 - $210,325.00 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.