Senior Network Engineer

We are seeking a Network Engineer who is responsible for the design, configuration, maintenance, and optimization of enterprise network environments. This role supports multiple network domains and plays a key part in ensuring secure, reliable, and high-performance connectivity across the organization. The engineer collaborates closely with cybersecurity, systems, and application teams to ensure seamless infrastructure integration and compliance with federal and DoD standards. Leads troubleshooting and resolution of Tier 3-level network incidents, escalations, and outages

 Primary Responsibilities:

• Administer, configure, and maintain routers, switches, firewalls, VPNs, and network monitoring tools across diverse network environments.
• Design and implement secure network architectures, including segmentation, redundancy, and failover strategies.
• Monitor network performance, analyze usage trends, and implement improvements to ensure optimal throughput and reliability.
• Manage IP address allocation, DNS, DHCP, and VLAN configurations across the enterprise.
• Ensure compliance with applicable network security protocols, including DoD STIGs, RMF, and other accreditation standards (e.g., DoD 8500 series).
• Maintain and update detailed documentation, including network configurations, topologies, procedures, and baselines.
• Collaborate with cross-functional teams to integrate network infrastructure with broader IT and cybersecurity systems.
• Support Continuity of Operations (COOP) and Disaster Recovery (DR) initiatives.
• Participate in patch management processes and network modernization efforts.

• Provide technical guidance and mentorship to Tier 1 and Tier 2 support staff; contribute to internal training and knowledge-sharing initiatives.

Basic Qualifications

• TS/SCI w/ Poly Clearance is required
• Bachelor’s degree in related field with 4+ years of relevant experience OR CCNA Certification with 4+ years of experience
• Strong hands-on experience in network engineering, including planning, designing, implementing, and supporting enterprise network infrastructures.
• Proficient in configuring and troubleshooting routing protocols such as BGP, OSPF, and EIGRP.
• Solid understanding and operational experience with routing and switching technologies and protocols.
• Experience managing networking hardware including routers, switches, and load balancers.
• Practical experience in network administration and network security best practices.
• Ability to manage and configure firewalls and other perimeter security devices.
• Familiarity with load balancer setup and management to optimize traffic distribution.
• Strong troubleshooting skills with the ability to identify and resolve complex network issues.
• Experience in network monitoring, testing, and performance optimization.
• Ability to work independently and lead tasks or small projects, including mentoring junior technical staff.
• Strong written and verbal communication skills; comfortable working with cross-functional and client-facing teams.

Preferred Qualifications

• Professional certifications such as CCNA, CCNP, CompTIA Network+, or Security+.
• Experience with network design and implementation in federal, DoD, or other regulated environments.
• Familiarity with network accreditation processes (e.g., RMF, STIGs, DoD 8500 series compliance).
• Experience in evaluating and recommending new networking technologies and tools.
• Scripting or automation experience for network configuration and monitoring (e.g., Python, Ansible).
• Knowledge of COOP/DR (Continuity of Operations/Disaster Recovery) networking considerations.
• Familiarity with SDN (Software Defined Networking) or cloud-based networking environments (e.g., AWS VPCs, Azure Networking).
• Experience documenting network architectures, diagrams, procedures, and operational baselines.

EC-DAS

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting:

August 26, 2025

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 $89,700.00 - $1