Senior Network Engineer

About the role

Leidos is seeking a Senior Network Engineer to support the design, implementation, modernization, and sustainment of enterprise network infrastructure within a fast-paced Department of Defense (DoD) environment in Fort Belvoir, VA or Albuquerque, New Mexico.

Responsibilities

• Design, implement, configure, and maintain enterprise LAN and WAN infrastructure.
• Engineer and support Cisco routing and switching environments for mission-critical networks.
• Configure, troubleshoot, and optimize enterprise routing and switching technologies, including: OSPF, BGP, VLANs, Spanning Tree Protocol (STP), HSRP/VRRP.
• Support WAN connectivity utilizing MPLS, VPN, and Internet-based transport technologies.
• Configure, administer, and maintain Palo Alto Networks next-generation firewalls.
• Design, implement, and support secure Palo Alto GlobalProtect remote access and site-to-site VPN solutions.
• Monitor network health, analyze performance, identify bottlenecks, and implement corrective actions.
• Perform advanced Layer 1–7 network troubleshooting using industry-standard diagnostic tools.
• Develop and maintain engineering documentation, implementation plans, network diagrams, and standard operating procedures.
• Participate in technology refreshes, network modernization efforts, and infrastructure upgrades.
• Collaborate with cybersecurity personnel to ensure compliance with DoD cybersecurity policies, RMF requirements, and applicable STIGs.
• Support scheduled maintenance activities, incident response, and operational troubleshooting in a high-availability environment.

Requirements

• Bachelor’s degree in computer science, information technology, engineering, or a related discipline with 8+ years of relevant experience.
• Active DoD 8570/8140 IAT Level II certification (Security+, CySA+, or equivalent).
• Active Secret security clearance with the ability to obtain and maintain Top Secret clearance with SCI eligibility.
• Extensive experience designing, implementing, and supporting enterprise Cisco network infrastructure.
• Strong working knowledge of: TCP/IP, IPv4/IPv6, DDI (DNS / DHCP / IPAM), NAT, VLANs, copper and fiber optic cabling standards, Quality of Service (QoS), OSPF, MPLS, Secure Access Service Edge (SASE) technologies.
• Hands-on experience configuring and administering Palo Alto Networks next-generation firewalls, including security policies, NAT, threat prevention, and GlobalProtect.
• Experience implementing and supporting secure remote-access and site-to-site VPN technologies.
• Demonstrated experience troubleshooting enterprise LAN and WAN environments.
• Experience supporting networking solutions within a fast-paced Department of Defense enterprise.
• Excellent written, verbal, and interpersonal communication skills.
• Ability to manage multiple priorities while working independently and as part of a technical team.

Qualifications

• Active Cisco Certified Network Associate (CCNA) certification.
• Experience with Border Gateway Protocol (BGP) and advanced Software-Defined WAN (SD-WAN) architectures.
• Experience deploying and supporting Versa Networks or similar SD-WAN solutions.
• Experience with network automation using Python, Ansible, and Infrastructure-as-Code (IAC) technologies.
• Familiarity with Network Access Control and Comply-to-Connect technologies such as Cisco Identity Services Engine (ISE) and IEEE 802.1X authentication.
• Experience with enterprise network monitoring platforms such as SolarWinds or PRTG.
• Experience supporting hybrid cloud networking in Microsoft Azure and/or AWS environments.
• Knowledge of DoD Risk Management Framework (RMF), Security Technical Implementation Guides (STIGs), and Zero Trust networking principles including SD-WAN, micro- and macro-segmentation, and Zero Trust Network Access (ZTNA).
• Familiarity with break-and-inspect, reverse-web-proxy, and other application-based firewall features.
• Experience reviewing packet capture data for troubleshooting and packet analysis.
• Experience supporting on-prem virtualization platforms such as vSphere.

Skills

• Experience with Cisco Certified Network Professional (CCNP) certification.
• Experience with Border Gateway Protocol (BGP) and advanced Software-Defined WAN (SD-WAN) architectures.
• Experience deploying and supporting Versa Networks or similar SD-WAN solutions.
• Experience with network automation using Python, Ansible, and Infrastructure-as-Code (IAC) technologies.
• Familiarity with Network Access Control and Comply-to-Connect technologies such as Cisco Identity Services Engine (ISE) and IEEE 802.1X authentication.
• Experience with enterprise network monitoring platforms such as SolarWinds or PRTG.
• Experience supporting hybrid cloud networking in Microsoft Azure and/or AWS environments.
• Knowledge of DoD Risk Management Framework (RMF), Security Technical Implementation Guides (STIGs), and Zero Trust networking principles including SD-WAN, micro- and macro-segmentation, and Zero Trust Network Access (ZTNA).
• Familiarity with break-and-inspect, reverse-web-proxy, and other application-based firewall features.
• Experience reviewing packet capture data for troubleshooting and packet analysis.
• Experience supporting on-prem virtualization platforms such as vSphere.

Benefits

Pay Range $92,300.00 - $166,850.00

Pay

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.

Leidos Commitment to Diversity and Inclusion

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.