Network Architect SME

Leidos; Fort Belvoir (VA); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos is seeking a Network Architect SME to lead design, implementation, and optimization of enterprise Application Delivery and DDI infrastructure at Fort Belvoir, VA or Albuquerque, NM. Deep hands-on expertise with F5 technology and Infoblox will ensure highly available, secure, and scalable delivery across the enterprise network for critical mission requirements.

You will act as the technical lead, architecting and deploying network solutions in a hybrid multi-cloud environment, and

Qualifications

• Bachelor's degree in CS/IT or related field with 12–15 years of experience, or Master's with 10–13 years.
• Active TS/SCI clearance required at time of hire.
• Active IAT Level II cert (e.g., Security+ CE, CySA+, GSEC, SSCP).
• CCNA required; CCNP/CCIE preferred; US citizenship required.
• 8+ years in network engineering/architecture focused on application delivery networks.
• Deep F5 BIG-IP expertise (LTM/GTM) and Infoblox DDI mastery.
• Experience with DoW/DoD operations or mission-critical networks.
• Strong communication and leadership for design approvals.

Responsibilities

• Application Delivery Architecture - design, deploy, and manage high-availability and secure delivery for mission-critical apps.
• F5 Infrastructure Management - architect and maintain BIG-IP LTM/GTM deployments.
• Enterprise DDI Administration - lead Infoblox deployment and IPAM integration across the enterprise.
• Cross-Functional Collaboration - work with developers, cybersecurity, and systems engineers.
• Troubleshooting & Optimization - advanced traffic analysis and performance tuning for complex workflows.
• Documentation & Standards - develop architectural docs and SOPs.
• Compliance & Documentation - ensure DoW STIGs and IL5/IL6/IL7 alignment; traceability.

Skills

F5 BIG-IP

GTM/LTM

Infoblox DDI

DoD/NOC/SOC experience

TCP/IP

Leadership

Communication

Security Clearance TS/SCI

Education

Bachelor's degree in CS/IT or related field

Master's degree (optional with years of experience)

Tools

Infoblox

F5 BIG-IP

Ansible

Python

Terraform

Job description

Description

Leidos is seeking a highly skilled and experienced Network Architect SME to lead the design, implementation, and optimization of our enterprise application delivery and DDI (DNS, DHCP, and IPAM) infrastructure in Fort Belvoir, VA or Albuquerque, New Mexico. The ideal candidate will have deep, hands‑on expertise with F5 technologies and Infoblox, ensuring highly available, secure, and scalable application delivery models across the enterprise network in support of critical mission requirements that enhance the reliability and security of Department of War (DoW) networks and systems.

Acting as the technical lead for this initiative, you will architect and deploy network solutions utilizing F5 and Infoblox technologies in concert to provide intelligent and scalable global server load balancing (GSLB), secure DNS solutions,

and enterprise IP address management across our customer’s rapidly evolving hybrid multi‑cloud environment.

Clearance Requirement

Active TS/SCI

Primary Responsibilities

• Application Delivery Architecture - Design, deploy, and manage advanced application delivery models ensuring high availability, optimal performance, and security for mission‑critical enterprise applications.

• F5 Infrastructure Management - Architect and maintain F5 BIG‑IP solutions, with a heavy focus on Local Traffic Manager (LTM) and Global Traffic Manager (GTM) for intelligent local and global load balancing.

• Enterprise DDI Administration - Lead the engineering, deployment, and administration of enterprise‑class DDI infrastructure utilizing Infoblox technology (DNS, DHCP, and IP Address Management).

• Cross‑Functional Collaboration - Work closely with application developers, cybersecurity teams, and systems engineers to translate application requirements into resilient, highly available network architectures.

• Troubleshooting & Optimization - Perform advanced network troubleshooting, traffic analysis, packet capture, and performance tuning for complex application delivery workflows.

• Documentation & Standards - Develop and maintain comprehensive architectural documentation, standard operating procedures, and technical blueprints.

• Compliance & Documentation: Ensure all tools comply with DoW STIGs and IL5/IL6/IL7 protocols; develop and maintain architectural documentation and compliance traceability.

Basic Qualifications

• Security Clearance: Active Top Secret / Sensitive Compartmented Information (TS/SCI) required at time of hire.

• Education: Bachelor's degree in Computer Science, Information Technology, or a related technical discipline and 12 – 15 years of prior relevant experience or Masters with 10 – 13 years of prior relevant experience. May possess a Doctorate in technical domain. Specific experience, education and training may be considered in lieu of degree.

• Certification: Active IAT Level II certification (e.g., Security+ CE, CySA+, GSEC, or SSCP) required.

• Cisco CCNA Certification (CCNP or CCIE Preferred).

• Citizenship: United States Citizenship is required.

• Experience Level: Minimum of 8+ years of progressive experience in network engineering and architecture, with a dedicated focus on application delivery networks (ADN).

• F5 Expertise: Deep, demonstrable expertise in F5 BIG‑IP platforms, specifically configuring, upgrading, and migrating

• LTM and GTM/F5 DNS environments.

• Infoblox / DDI Mastery: Extensive experience designing and operating enterprise‑class Infoblox DDI environments, including Grid architecture and seamless IPAM integration.

• RSA (Multi factor authentication)experience.

• Core Networking: Mastery of OSI model layers 2-7, TCP/IP, routing protocols (e.g., BGP, OSPF), and solid experience with SSL/TLS offloading and certificate management.

• Leadership: Experience leading technical working groups and directing the efforts of adjacent infrastructure and development teams.

• Operational Experience: Prior experience working within a DoW/DoD Operations Center (NOC/SOC) or supporting mission‑critical systems and networks.

• Communication: Must be able to present designs, plans, and analyses of alternatives to technical leadership boards for approvals.

Preferred Qualifications

• Automation Skills Experience with network automation and orchestration tools (e.g., Ansible, Python, Terraform, or

• F5 AS3) is highly desired.

• Certifications: F5 Certified Technology Specialist (F5-CTS) or Solution Expert (F5-CSE), and Infoblox Core DDI certifications are strongly preferred.

Original Posting

September 28, 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 onlyand 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.

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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

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. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

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.