Leidos is seeking a Senior Infoblox DDI Engineer to engineer, implement, migrate, and sustain enterprise DNS, DHCP, and IP address management (DDI) services in support of large-scale network operations. The engineer will provide hands-on technical leadership for Infoblox grid infrastructure, DNS, DHCP, IPAM, and associated network services, including design, migration, troubleshooting, testing, security hardening, and production implementation. The position also requires strong routing and switching expertise because DDI services depend on the underlying network for reachability, DHCP relay, segmentation, routing, and high availability. The engineer must be able to troubleshoot issues across both the Infoblox platform and the network infrastructure supporting it.
Scope and Impact
Impact: Contributes to the completion of significant project milestones and recommends technical solutions and improvements that affect program results. Work is performed under general direction, with latitude for independent judgment on technical approach.
Complexity: Resolves complex technical problems requiring in-depth analysis, evaluation of multiple factors, and application of established engineering principles and best practices.
Communication: Communicates technical information, design recommendations, risks, and status to engineering leadership, peer teams, and stakeholders. Explains complex technical concepts clearly to both technical and non-technical audiences.
Knowledge: Strong working knowledge of DNS, DHCP, and IPAM principles and of routing and switching concepts, with demonstrated depth in enterprise DDI platform engineering.
Primary Responsibilities
Infoblox and DDI Engineering
- Engineer, deploy, configure, and sustain Infoblox grid infrastructure, including grid masters, grid master candidates, members, high-availability pairs, and distributed appliances across sites and enclaves.
- Design and maintain enterprise DNS architecture, including authoritative and recursive services, forward and reverse zones, delegation, conditional forwarding, split-horizon views, zone transfers, and DNSSEC.
- Engineer and maintain enterprise DHCP services, including scope and range design, failover and redundancy, reservations, option configuration, relay behavior, and lease management.
- Design and maintain IPAM structure, including network containers, address space allocation, utilization reporting, extensible attributes, and data hygiene across the enterprise.
- Perform Infoblox grid upgrades, patching, backup and restore, capacity planning, licensing, and lifecycle management.
- Integrate Infoblox with Active Directory, network access control, automation platforms, and provisioning workflows via APIs and supported integrations.
- Implement DNS security capabilities such as response policy zones, query filtering and logging, and threat-intelligence-driven blocking where approved.
Routing and Switching Engineering
- Engineer, configure, and implement enterprise routing and switching infrastructure supporting DDI services, including routing policy, VLAN architecture, DHCP relay paths, anycast service delivery, and high-availability designs.
- Support routing protocol configuration and troubleshooting across BGP, OSPF, and EIGRP, including redistribution, filtering, and convergence behavior affecting DDI reachability.
- Perform installation, modification, configuration, testing, and servicing of network equipment, including hardware refresh and software upgrades.
- Provide senior-level troubleshooting for complex connectivity, name resolution, and address assignment issues spanning client, network, and service layers.
Implementation and Documentation
- Develop implementation plans, test and validation steps, rollback procedures, and change documentation for DDI and network changes, and execute them during approved change windows.
- Support DNS and DHCP migrations, consolidations, and namespace cleanup efforts, including data validation and cutover sequencing.
- Apply configuration hardening, STIG requirements, and vulnerability remediation to DDI appliances and network devices.
- Maintain DDI architecture diagrams, namespace and address plans, zone and scope documentation, integration designs, backup and recovery procedures, troubleshooting guides, standard operating procedures, and as-built documentation.
Required Qualifications
- Bachelor’s degree with 8+ years of relevant experience, or a Master’s degree with 6+ years of relevant experience. Additional relevant experience, education, and training may be considered in lieu of a degree.
- Significant hands-on experience engineering, implementing, and troubleshooting enterprise network infrastructure supporting DNS, DHCP, and IP Address Management (DDI) services, including TCP/IP, VLANs, routing, DHCP relay, high availability, and service reachability.
- Working knowledge of enterprise routing protocols, including BGP and OSPF; experience with EIGRP is desirable.
- Strong working knowledge of DNS and DHCP, including DNS resolution, zone management, scope and range design, DHCP options, relay, failover, lease management, and troubleshooting.
- Strong understanding of IPAM principles and practices, including address-space planning, allocation standards, utilization management, and data integrity.
- Demonstrated experience performing enterprise-scale DNS and DHCP migrations, including discovery, data analysis, source validation, migration planning, cutover execution, rollback planning, and post-migration verification.
- Experience migrating DNS and DHCP services from legacy platforms, including Microsoft DNS/DHCP, to Infoblox or equivalent enterprise DDI platforms.
- Hands-on experience with Infoblox Grid architecture, including Grid Masters, Grid Master Candidates, Grid Members, high-availability pairs, delegated administration, and distributed DDI service delivery.
- Experience troubleshooting complex DNS resolution and DHCP address-assignment issues using packet captures, DNS query analysis, DHCP transaction analysis, logs, and network telemetry.
- Experience with DNS architecture and operations, including forward and reverse zones, AXFR/IXFR zone transfers, primary/secondary relationships, delegation, forwarding, recursion, conditional forwarding, and DNSSEC.
- Experience configuring and troubleshooting DHCP relay across routed, segmented, and multi-VRF network environments.
- Experience validating DNS and DHCP data before migration, including DNS records, scopes, reservations, exclusions, leases, options, stale records, and duplicate or conflicting data.
- Experience developing detailed migration runbooks, implementation plans, test procedures, validation criteria, and rollback procedures, and executing DNS/DHCP cutovers during approved production maintenance windows.
- Experience performing post-migration validation of DDI services, including forward and reverse DNS resolution, DHCP address allocation, relay operation, failover, client connectivity, and service availability.
- Experience supporting DDI services across multiple network enclaves, security zones, geographically distributed sites, or other complex enterprise network environments.
- Experience with DNS/DHCP monitoring, alerting, capacity management, availability management, and operational health reporting.
- Experience maintaining configuration baselines and as-built documentation for DNS, DHCP, IPAM, and Infoblox infrastructure.
- Demonstrated ability to identify and resolve dependencies among DNS, DHCP, IPAM, Active Directory, routing and switching infrastructure, applications, identity services, and security controls.
- Ability to analyze, reconcile, and remediate inaccurate or inconsistent DDI data and establish standards for maintaining DNS, DHCP, and IPAM data quality.
- Experience developing and executing technical test plans with documented success criteria, validation evidence, defect tracking, remediation, and operational acceptance.
- Experience supporting formal change-management processes, including change requests, implementation plans, maintenance windows, validation evidence, backout procedures, and post-change documentation.
- Demonstrated troubleshooting experience using packet capture and protocol-analysis tools across multi-vendor enterprise environments.
- Hands-on experience with Infoblox and one or more enterprise networking technologies or platforms, such as Cisco, Aruba, Palo Alto, Dell, or Brocade.
- Experience with IPv6 addressing, DNS, and DHCPv6 in enterprise dual-stack or IPv6 migration environments is desirable.
- Experience automating Infoblox provisioning and DDI data management using WAPI, REST APIs, Python, Ansible, or equivalent automation technologies.
- Experience integrating Infoblox with enterprise services such as Active Directory, PKI, NAC, identity services, configuration-management platforms, monitoring systems, and automation workflows.
- Experience applying cybersecurity hardening, vulnerability remediation, configuration baselines, and applicable DoD security requirements to DDI and supporting network infrastructure.
- Strong written and verbal communication skills, with demonstrated experience developing technical designs, implementation procedures, network diagrams, migration documentation, and operational procedures using Visio, PowerPoint, or similar tools.
- Current DoD IAT Level II certification or higher, such as Security+ CE.
- Active DoD Secret clearance.
Preferred Qualifications
- Infoblox certification (such as Infoblox Core DDI or equivalent) and Cisco Certified Network Professional (CCNP) Enterprise or equivalent.
- Experience with large-scale DNS/DHCP migrations, consolidations, or transitions from Microsoft DNS/DHCP to Infoblox.
- Experience with Infoblox API, WAPI automation, or scripting with Python or Ansible to automate DDI provisioning and data hygiene.
- Experience with anycast DNS delivery and distributed service architectures.
- Experience integrating DDI with network access control, identity-based networking, and segmentation efforts.
- Experience with IPv6 addressing, DNS, and DHCPv6 in enterprise environments.
- Experience integrating enterprise networking and DDI with cloud infrastructure and hybrid connectivity.
- Experience applying DISA STIGs, vulnerability remediation, and configuration hardening.
- Experience with Jira, Confluence, or similar project and knowledge-management tools.
Key Success Factors
- Successfully execute DNS and DHCP migrations with minimal operational impact.
- Maintain DNS, DHCP, and IPAM data integrity before, during, and after migration.
- Detect and resolve dependencies between DDI services and routing, switching, security, identity, and applications.
- Produce repeatable migration procedures that can be executed consistently across multiple SIPR sites and environments.
- Restore or roll back DDI services quickly when migration validation criteria are not met.
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:October 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
- Bachelor’s degree with 8+ years of relevant experience, or master’s degree with 6+ years; equivalent experience, education, or training may substitute.
- Hands-on enterprise network infrastructure engineering supporting DNS, DHCP, and IPAM services.
- Working knowledge of BGP and OSPF; EIGRP experience is desirable.
- Strong knowledge of DNS, DHCP, IPAM, TCP/IP, VLANs, routing, DHCP relay, high availability, and service reachability.
- Experience performing enterprise-scale DNS and DHCP migrations, including planning, cutover, rollback, and validation.
- Experience migrating Microsoft DNS/DHCP or legacy platforms to Infoblox or equivalent enterprise DDI platforms.
- Hands-on experience with Infoblox Grid architecture, including Grid Masters, Grid Members, high-availability pairs, and delegated administration.
- Experience troubleshooting DNS resolution and DHCP address-assignment issues using packet captures, logs, query analysis, and network telemetry.
- Experience with DNS zones, transfers, delegation, forwarding, recursion, conditional forwarding, and DNSSEC.
- Experience configuring and troubleshooting DHCP relay across routed, segmented, and multi-VRF environments.
- Experience validating DNS and DHCP records, scopes, reservations, exclusions, leases, options, stale records, and conflicting data.
- Experience developing migration runbooks, implementation plans, test procedures, validation criteria, and rollback procedures.
- Experience supporting DDI across multiple enclaves, security zones, geographically distributed sites, or complex enterprise environments.
- Experience with DDI monitoring, alerting, capacity management, availability management, and operational health reporting.
- Experience maintaining configuration baselines and as-built documentation for DDI infrastructure.
- Experience identifying dependencies among DNS, DHCP, IPAM, Active Directory, routing, switching, applications, identity services, and security controls.
- Experience developing and executing technical test plans with success criteria, validation evidence, defect tracking, remediation, and operational acceptance.
- Experience supporting formal change-management processes and production maintenance windows.
- Hands-on experience with Infoblox and enterprise networking platforms such as Cisco, Aruba, Palo Alto, Dell, or Brocade.
- Experience with IPv6, DNS, and DHCPv6 in dual-stack or migration environments.
- Experience automating Infoblox provisioning and DDI data management using WAPI, REST APIs, Python, Ansible, or equivalent technologies.
- Experience integrating Infoblox with Active Directory, PKI, NAC, identity services, monitoring systems, and automation workflows.
- Experience applying cybersecurity hardening, vulnerability remediation, configuration baselines, and DoD security requirements.
- Strong written and verbal communication skills and experience producing technical designs, procedures, diagrams, and operational documentation.
- Current DoD IAT Level II certification or higher, such as Security+ CE.
- Active DoD Secret clearance.
- Infoblox certification and CCNP Enterprise or equivalent.
- Experience with anycast DNS, distributed service architectures, cloud or hybrid connectivity, DISA STIGs, Jira, or Confluence.
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.
