Network Engineer

Senior Network Engineer – Switch Migration & Infrastructure Security Experience Level: 10+ Years | Contract Role About the Role We're looking for a seasoned Network Engineer to lead a critical switch migration initiative — owning everything from architecture review and secure configuration to live cutover and post-migration support. This is a hands-on, high-visibility role for someone who thrives on precision planning, airtight execution, and zero-surprise go-lives. If you've led enterprise switch migrations end-to-end, know your way around security hardening standards, and can speak fluently to both engineers and business stakeholders — we want to talk to you. What You'll Own Planning & Design • Review network architecture, design documents, and migration requirements • Validate switch hardware, software versions, licensing, and compatibility • Build implementation, migration, rollback, and test plans • Identify dependencies, risks, and outage windows • Coordinate cross-functionally with security, server, application, and ops teams Build & Configuration • Upgrade firmware/OS to approved baselines • Review and configure switches per approved standards Security Hardening • Implement network security hardening aligned to company standards • Disable unused ports and services • Ensure full compliance with security and audit requirements Monitoring & Alerting • Integrate switches with enterprise monitoring platforms • Configure and validate: SNMP, Syslog forwarding, NetFlow/sFlow (where applicable), performance & capacity monitoring, interface utilization, and environmental monitoring (temperature, power, fan status) • Set up operational alerts and confirm data flow into monitoring platforms Migration Execution • Perform pre-migration validation and health checks • Back up existing configurations • Execute migrations per approved plan with minimal downtime • Coordinate cutover with application and infrastructure teams Testing & Validation • Run full connectivity testing • Troubleshoot and resolve issues in real time Documentation • Maintain network diagrams, port mappings, IP addressing records, security configs, and monitoring documentation • Keep implementation and rollback procedures current Post-Migration Support • Monitor logs and alerts post-cutover • Optimize configurations as needed • Deliver knowledge transfer to operations • Secure stakeholder sign-off on successful migration • Prepare all release-readiness documentation What You Bring • 10+ years of hands-on network engineering experience • Deep expertise in network switch migrations at enterprise scale • Strong command of network infrastructure and configuration • Proven track record in network security hardening • Working knowledge of monitoring and alerting tools (SNMP, Syslog, NetFlow/sFlow) • Excellent documentation discipline and attention to detail • Strong stakeholder coordination skills — able to manage technical and business conversations alike • Calm, methodical approach under pressure during live migrations Deliverables You'll Drive • Approved switch build configuration • Completed security hardening checklist • Fully integrated and tested monitoring/alerting • Configuration backups and rollback plans • Updated network diagrams and documentation • Migration report with validation results and sign-off • Complete release-readiness documentation package