Senior Infoblox DDI Engineer

Global Enterprise Services, LLC•Fort Meade, MD

2h•$105,000 - $120,000•Hybrid

About The Position

GES is seeking a Senior Infoblox DDI Engineer to engineer, implement, migrate, and sustain enterprise DNS, DHCP, and IP address management (DDI) services supporting large-scale network operations. The role provides hands-on technical leadership for Infoblox grid infrastructure and associated network services, covering design, migration, troubleshooting, testing, security hardening, and production implementation. It also requires routing and switching expertise to support DDI reachability, DHCP relay, segmentation, routing, and high availability, and to troubleshoot across both the Infoblox platform and its supporting network infrastructure. Work is performed under general direction, with latitude for independent technical judgment. The engineer contributes to significant project milestones, recommends solutions and improvements affecting program results, resolves complex technical problems, and communicates design recommendations, risks, and status to engineering leadership, peer teams, and stakeholders. The role requires explaining complex technical concepts to technical and non-technical audiences. The position requires five days in the office until acclimated, after which one remote day may be possible. An active DoD Secret clearance is required.

Requirements

Bachelor’s degree and 8 or more years of relevant experience, or a master’s degree and 6 or more 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 IPAM, including TCP/IP, VLANs, routing, DHCP relay, high availability, and service reachability.
Working knowledge of enterprise routing protocols, including BGP and OSPF.
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 conducting 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 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 records, scopes, reservations, exclusions, leases, options, stale records, and duplicate or conflicting data.
Experience developing migration runbooks, implementation plans, test procedures, validation criteria, and rollback procedures, and executing cutovers during approved production maintenance windows.
Experience conducting post-migration validation of 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, applications, identity services, and security controls.
Ability to analyze, reconcile, and remediate inaccurate or inconsistent DDI data and establish data-quality standards.
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 automating Infoblox provisioning and DDI data management using WAPI, REST APIs, Python, Ansible, or equivalent 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, including 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.

Nice To Haves

EIGRP experience.
Experience with IPv6 addressing, DNS, and DHCPv6 in enterprise dual-stack or IPv6 migration environments.
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 Python or Ansible scripting for 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 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.

Responsibilities

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 structures, including network containers, address allocation, utilization reporting, extensible attributes, and data hygiene.
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 through APIs and supported integrations.
Implement approved DNS security capabilities, including response policy zones, query filtering and logging, and threat-intelligence-driven blocking.
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.
Configure and troubleshoot BGP, OSPF, and EIGRP routing, including redistribution, filtering, and convergence behavior affecting DDI reachability.
Install, modify, configure, test, and service network equipment, including hardware refreshes and software upgrades.
Troubleshoot complex connectivity, name-resolution, and address-assignment issues spanning client, network, and service layers.
Develop implementation plans, test and validation steps, rollback procedures, and change documentation for DDI and network changes; execute changes during approved change windows.
Support DNS and DHCP migrations, consolidations, and namespace cleanup, 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.
Execute DNS and DHCP migrations with minimal operational impact while maintaining data integrity before, during, and after migration.
Identify and resolve dependencies between DDI services and routing, switching, security, identity, and applications.
Develop repeatable migration procedures for use across multiple SIPR sites and environments, and restore or roll back services promptly when validation criteria are not met.