The Senior Network Engineer is responsible for leading and executing enterprise-wide migration initiatives from public to private IP addressing across applications, databases, servers, and network devices. This role ensures secure, resilient, and uninterrupted service delivery through careful planning, dependency analysis, execution, validation, and documentation of network changes in complex on-premises, cloud, or hybrid environments.Key ResponsibilitiesConduct a comprehensive assessment of all servers, applications, databases, and network devices currently using public IP addressesDevelop a detailed IP migration plan covering timelines, phased execution, backup strategies, and service rollback procedures when requiredPerform application and service dependency analysis to identify and mitigate the impact of IP address migration on interconnected systemsDesign and allocate new private IP address ranges, ensuring full compatibility with the existing network architecture and infrastructure standardsExecute the migration from public to private IP addresses in a secure and controlled manner, while maintaining continuous operation of business-critical applications and servicesCoordinate with security, systems, application, and operations teams to align firewall rules, routing, NAT, DNS, and access controls with the new private addressing modelPerform post-migration validation and testing to confirm service availability, performance, and network stabilityPrepare and maintain comprehensive documentation for all migration phases, including implemented changes, encountered issues, root causes, and applied solutionsAssess and analyze all DNS records to identify unused, obsolete, or outdated entriesClassify DNS records based on criticality, activity level, and operational validityRemove or update invalid, obsolete, or unnecessary DNS entries in accordance with approved change proceduresEnsure that DNS cleanup activities do not impact applications, services, or end usersEstablish periodic review procedures to maintain the accuracy and health of DNS records on an ongoing basisDocument all DNS review, cleanup activities, and applied changes for audit, compliance, and operational referenceRequirementsRequired Technical Skills & ExperienceStrong expertise in enterprise network design, IP addressing (IPv4/IPv6), subnetting, and routing protocolsHands-on experience with IP address migration projects in large-scale environments (on-prem, cloud, or hybrid)Solid knowledge of firewalls, load balancers, DNS, NAT, VPNs, and network security controlsExperience working with high-availability and mission-critical environments, ensuring zero or minimal downtimeAbility to analyze complex application-to-network dependenciesFamiliarity with change management, rollback planning, and disaster recovery practicesSoft Skills & Professional CompetenciesStrong analytical and problem-solving skillsExcellent documentation and technical reporting capabilitiesAbility to work under pressure and manage high-risk infrastructure changesEffective communication with technical and non-technical stakeholdersEducation & Certifications (Preferred)Bachelor's degree in Computer Science, Information Technology, or a related fieldRelevant certifications such as CCNP/CCIE, JNCIP/JNCIE, Infoblox Technical Certifications or equivalent are highly prefer