Senior Network Engineer

The Senior Network Engineer provides Tier‑3/Tier‑4 engineering expertise for design, implementation, troubleshooting, and optimization of the HSEN WAN and HQ LAN‑A infrastructure, ensuring ≥ 99.5 % availability for critical services. The role supports configuration management, change control, security patching, and incident response across routers, switches, firewalls, VPN/DMVPN/SD‑WAN, wireless, and cloud network components. The objective of the support services for this project is to design, build, and maintain a cloud infrastructure with a focus on network security that supports the organization's technology and business needs. This involves architecting scalable, secure, and highly available cloud solutions, ensuring optimal performance and cost-efficiency in cloud environments such as AWS, Azure, and Google Cloud. The role requires close collaboration with other IT teams, stakeholders, and third-party vendors to deliver cloud-based infrastructure and services that align with organizational goals. Key Tasks and Responsibilities Core Engineering: * Engineer and implement upgrades to WAN/LAN per approved designs; validate in lab prior to production cut‑over. * Perform advanced routing (OSPF/BGP/DMVPN/SD‑WAN), QoS, multicast, and segmentation. * Integrate new security controls (NGFW, IDS/IPS, ZTNA) and support ATO evidence collection. Operations & Support: * Provide Tier‑3 escalation and Tier‑4 manufacturer liaison for Priority‑1/2 incidents. * Execute vulnerability remediation and patch management per DHS severity windows. * Coordinate change‑management reviews and post‑implementation validation. Process & Documentation: * Develop and maintain device configurations, SOPs, logical/physical diagrams in CMDB/ServiceNow. * Generate weekly service‑request metrics, monthly availability, and root‑cause reports. *Contribute to automation scripts (Ansible/Python) and network‑modernization prototypes. This Role Provides Task Support for: * Operational Support * Software Maintenance and Upgrades * Telecommunications Maintenance (Data, Voice, Images, including Wireless) * * Infrastructure Management Services (IMS) * Configuration Management * Network/Hardware Support * IT Support (Tier 3 network support) * Resource Management * Backup and Recovery Management * Installation, Configuration, and Tuning * Electronic Software Licensing Services including license: deployment, management, tracking, upgrading, etc. * Infrastructure System Management – Firewalls, etc. * IT Operation and Maintenance Planning * Data Quality Management * Transformation Services * Continual Service Improvement * Balanced Scorecard for Operations * IT Infrastructure Optimization