Senior Network Engineer

Leidos; United States; Remote; USD 92,000 - 167,000; Full time

Benefits offered by this job

Health and Wellness programs

Retirement benefits

Competitive compensation

Job summary

Leidos is seeking a Senior Network Engineer to design, implement, and optimize complex network solutions across on-premises and hybrid cloud environments for a Federal Civil customer in the Washington, DC area. The role requires independent problem-solving, leadership in incident response, and guidance to junior engineers.

The ideal candidate possesses expert routing/switching knowledge (BGP/OSPF, VLANs/VRFs), strong security skills (Firepower, FMC, ASA), VPN design, and experience with AWS

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Engineering, or related field with 8+ years of network engineering experience.
• Advanced hands-on experience designing, implementing, administering, and troubleshooting complex enterprise network infrastructure in production environments.
• Expert-level knowledge of enterprise routing and switching technologies (BGP, OSPF, VLANs, VRFs) and network redundancy.
• Experience configuring, maintaining, and troubleshooting enterprise security infrastructure, including firewalls and VPN connectivity.
• Experience supporting Cisco and/or Juniper platforms in multi-vendor environments.
• Experience designing or supporting hybrid cloud connectivity between on-prem and AWS (VPC, Direct Connect, Transit Gateway).

Responsibilities

• Serve as a senior technical and escalation resource for complex network issues affecting mission-critical enterprise infrastructure.
• Lead planning, design, and optimization of network infrastructure across distributed, multi-vendor environments.
• Analyze complex technical challenges and implement corrective actions to improve reliability and security.
• Design, configure, maintain, and troubleshoot enterprise routing and switching infrastructure (BGP/OSPF/VLANs/VRFs) and network redundancy.
• Engineer and support enterprise security solutions including Cisco Firepower, FMC, ASA, and firewall policies.
• Design and sustain secure site-to-site and remote-access VPNs (AnyConnect).
• Engineer and maintain hybrid cloud connectivity with AWS (VPCs, Direct Connect, Transit Gateway).
• Collaborate with stakeholders to assess requirements, develop solutions, and influence network decisions.

Skills

Strong communication

Leadership

Problem solving

Independent worker

Mentorship

Education

Bachelor's degree in IT/CS/Engineering

Tools

BGP

OSPF

VLANs

VRFs

Firepower

FMC

ASA

AnyConnect

Direct Connect

Transit Gateway

VPCs

ISE

Load balancing

VPN

Cisco IOS

Job description

Leidos is seeking a Senior Network Engineer to support Federal Civil customer in the Washington, DC metropolitan area. LOCATION: This position is remote; however, prefer candidates that are within driving distance to the Washington, DC area.

Position Summary

The Senior Network Engineer will serve as a senior technical contributor responsible for designing, implementing, optimizing, and sustaining complex network solutions spanning on-premises infrastructure and hybrid cloud environments. The position requires technical expertise, independent problem-solving, and the ability to develop effective solutions to complex network challenges involving multiple technologies and technical disciplines. The successful candidate will collaborate with customer stakeholders, engineering teams, cybersecurity professionals, and program leadership to maintain network availability, performance, and security while supporting infrastructure modernization and evolving mission requirements. This role also provides technical guidance to other engineers and contributes to network architecture, engineering standards, and continuous operational improvement.

Clearance Requirements

Must have or able to obtain a Public Trust clearance; Must be a US Citizen.

Primary Responsibilities

• Serve as a Senior technical and escalation resource for complex network engineering and operational issues affecting mission-critical enterprise infrastructure.
• Lead the planning, design, implementation, and optimization of complex network infrastructure solutions across geographically distributed, multi-vendor environments.
• Independently analyze complex technical challenges involving multiple systems and disciplines, develop engineering solutions, and implement corrective actions that improve network reliability, performance, and security.
• Design, configure, maintain, and troubleshoot enterprise routing and switching infrastructure, including BGP, OSPF, VLANs, VRFs, routing redundancy, and network failover.
• Engineer and support enterprise network security solutions, including Cisco Firepower, Firepower Management Center (FMC), ASA, firewall policies, access controls, and security hardening.
• Design, implement, and sustain secure site-to-site and remote-access VPN solutions, including Cisco Secure Client/AnyConnect and connectivity with external partners and vendors.
• Engineer and maintain hybrid cloud network connectivity integrating on-premises infrastructure with AWS networking services, including VPCs, Direct Connect, Transit Gateway, and load balancing.
• Support enterprise wireless networking and network access control technologies, including Cisco Identity Services Engine (ISE).
• Lead technical planning and execution of network infrastructure upgrades, modernization initiatives, lifecycle replacements, and security remediation activities.
• Evaluate network performance, availability, capacity, and emerging technical requirements; recommend and implement improvements to strengthen service delivery and operational resilience.
• Lead complex incident investigations and root cause analysis, identifying systemic issues and developing sustainable corrective and preventive solutions.
• Collaborate with customer representatives, program leadership, cybersecurity teams, vendors, and service providers to assess requirements, develop technical solutions, and influence network engineering decisions.
• Develop and maintain network architecture documentation, configuration standards, technical implementation plans, and operational procedures.
• Support incident, problem, change, and service request management processes while ensuring technical accuracy, documentation, and operational accountability.
• Provide technical mentorship, peer review, and engineering guidance to junior and mid-level network engineers.
• Identify opportunities for network automation, standardization, and process improvement to increase operational efficiency, reliability, and security.

Basic Qualifications

• Bachelor's degree in Information Technology, Computer Science, Engineering, or a related technical field with 8+ years of relevant network engineering experience; additional education and experience equivalencies may be considered.
• Advanced hands‑on experience designing, implementing, administering, and troubleshooting complex enterprise network infrastructure in production environments.
• Expert-level knowledge of enterprise routing and switching technologies, including BGP, OSPF, VLANs, VRFs, and network redundancy and failover.
• Demonstrated experience developing and implementing technical solutions to complex network problems involving multiple systems, technologies, or engineering disciplines.
• Hands‑on experience configuring, maintaining, and troubleshooting enterprise network security infrastructure, including firewalls, access control policies, and VPN connectivity.
• Experience supporting Cisco and/or Juniper enterprise networking platforms in complex, multi‑vendor environments.
• Experience designing, implementing, or supporting hybrid cloud network connectivity between on‑premises infrastructure and AWS environments.
• Demonstrated experience independently leading complex network troubleshooting, root cause analysis, and corrective action efforts.
• Experience planning and executing network infrastructure changes, upgrades, and security remediation activities in production environments.
• Demonstrated ability to develop technical recommendations, communicate complex technical information, and collaborate with customer stakeholders, engineering teams, vendors, and service providers.
• Experience producing and maintaining network diagrams, technical documentation, configuration standards, and implementation procedures.
• Strong communication skills, with experience collaborating directly with customers, vendors, and ISPs to support network design, troubleshooting, and issue resolution.
• Hands‑on experience with Juniper EX/QFX & Junos OS, Cisco ISR & IOS devices, ASA, Firepower & FMC.
• Demonstrated experience with routing/switching protocols (e.g., BGP, OSPF, VRF) and core infrastructure services.
• Hands‑on experience managing AWS network infrastructure and hybrid cloud connectivity (e.g., VPC, direct-connect, transit gateways, load balancers) between on‑prem and cloud environments.
• Experience with remote access VPN solutions, including Cisco AnyConnect/Secure Client configuration and support.
• Experience with virtual computing/virtualization platforms (e.g., VMware/vSphere) as they relate to network design and connectivity.
• Experience with wireless infrastructure and NAC solutions (e.g., Cisco ISE).
• Experience with Cisco CUCM/UC voice solutions.
• Able to obtain a baseline 8140 certification [(IAT Level II) CCNA-Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP] within 90 days.

Preferred Qualifications

• Cisco Certified CCNA Cisco Certified CCNP or Juniper JNCIP-ENT.
• Experience with Cisco Meraki wireless solutions.
• Experience with Cisco ISE.
• Experience with Dell switches and OS10.
• Experience with ServiceNow.
• Security+ CE certification.

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.

Pay Range $92,300.00 - $166,850.00.

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

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.

About Leidos

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.