Leidos is seeking a highly skilled and experienced Senior Network Architect to lead the design, implementation, and
optimization of our enterprise application delivery and DDI (DNS, DHCP, and IPAM) infrastructure. 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 & 12+ years' experience.
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 8-10 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.
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.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:June 9, 2026For 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.
The Leidos pay range for this job level is a general guideline only and 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.
Skills Required
- Active Top Secret / Sensitive Compartmented Information (TS/SCI) clearance at time of hire
- United States Citizenship
- Bachelor's degree in Computer Science, Information Technology, or related technical discipline
- 12+ years' experience (education statement) and minimum 8-10 years progressive network engineering/architecture experience
- Active IAT Level II certification (e.g., Security+ CE, CySA+, GSEC, or SSCP)
- Cisco CCNA certification (CCNP or CCIE preferred)
- Deep hands-on expertise with F5 BIG-IP platforms, including LTM and GTM/F5 DNS
- Extensive experience designing and operating Infoblox enterprise DDI environments (Grid architecture, IPAM integration)
- Mastery of networking (OSI layers 2-7), TCP/IP, routing protocols (BGP, OSPF), SSL/TLS offloading and certificate management
- Experience working within DoW/DoD Operations Center (NOC/SOC) or supporting mission-critical systems/networks
- Experience leading technical working groups and directing adjacent infrastructure/development teams
- Ability to present designs and analyses of alternatives to technical leadership boards
- Knowledge of and ability to ensure compliance with DoW STIGs and IL5/IL6/IL7 protocols
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
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