Job #: R-00164775
Location: Chantilly, Virginia
Category: Systems Engineering
Schedule (FT/PT): Full Time
Travel Required: Yes, 10% of the time
Shift: Day
Remote Type: No Remote
Clearance: Top Secret/SCI with Polygraph
External Referral Program: Ineligible
Sector: National Security
Description
Leidos is seeking a High-Level Network Engineer to join our Infrastructure Team in Chantilly, VA, supporting a high-impact program that involves a sophisticated multi-datacenter, multi-tenant environment. This role will serve as a technical leader within the Network Engineering group, responsible for the full lifecycle of system architecture, design, and implementation with a strong emphasis on security, scalability, and performance.
This position requires a TS/SCI with Polygraph and a deep understanding of complex network systems and best practices. The candidate will contribute to the strategic design and development of new network architectures, ensuring secure, efficient, and robust connectivity in support of mission-critical operations.

REQUIRED QUALIFICATIONS

• Must have an active TS/SCI with Polygraph
• Must have a Bachelor’s degree in Engineering, Computer Science, or related technical discipline and at least 12 years of relevant experience or Master’s with at least 10years or a 10 years and a PhD OR 16 years + relatable work experience in lieu of degree
• Must pass or have a current Customer Medical Screening.
• Extensive experience with routing and switching protocols: EIGRP, OSPF, BGP, MP-BGP, MPLS, VPLS, LDP, VRFs, ECPM.
• Deep understanding of network infrastructure technologies: VLANs, VXLAN, EVPN, RSTP, vPC.
• Proficient in Cisco hardware: routers, switches, firewalls.
• Experience with Juniper firewalls and datacenter management.
• Strong background in systems engineering: design, integration, verification & validation, and fielding.
• Demonstrated experience resolving highly complex network and system problems.
• Proven ability to lead technical teams and interface with executive leadership.

DESIRED QUALIFICATIONS

• Certifications (strongly preferred):
• Cisco CCNP / CCIE (Routing & Switching, Data Center, or Security)
• Juniper JNCIS / JNCIP / JNCIE
• CompTIA Security+ / Network+
• VMware VCP-NV (NSX-T)

Familiarity with:

• Software-Defined Networking (SDN) solutions
• Automation tools (e.g., Ansible, Python scripting for network tasks)
• Network monitoring platforms (e.g., SolarWinds, NetScout)
• Experience supporting mission-critical, classified environments
• Experience leading trade studies and capability assessments
• Strong written and verbal communication skills, including technical documentation and executive presentations
• Ability to adapt and innovate in a dynamic and fast-paced environment

Come break things (in a good way). Then build them smarter.
We’re the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.”

• Architect, implement, and manage a scalable, secure, and resilient spine/leaf datacenter network infrastructure.
• Lead Tier 3 troubleshooting and escalation for complex routing and switching issues (~10% of time).
• Develop designs that integrate external connectivity to enterprise systems, coordinating closely with enterprise architects and security teams.
• Perform systems engineering functions including requirements analysis, timeline and trade studies, interface definitions, and verification/validation.
• Work directly with INFOSEC to ensure hardened systems, compliant with security directives and standards.
• Evaluate solutions based on cost, risk, performance, and supportability.
• Serve as subject matter expert in network architecture, supporting executive briefings and stakeholder engagements.
• Mentor and lead junior engineers and technical staff, overseeing technical output and project delivery quality.
• Support datacenter operations including cable plant management and systems integration.