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 ResponsibilitiesCore 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 OptimizationEducation & ExperienceMinimum Qualifications (must have):Master's degree in Information Technology, Network Engineering, or related field. 15+years progressive network engineering in large enterprise WAN/LANs. Experience using various platforms such as SharePoint, JIRA, and Confluence for project management Preferred Qualifications:10+years supporting DHS WAN/LAN environments. Experience with DHS cloud networking and automation (Infrastructure as Code). Experience leading network modernization projects for DHS CertificationsRequired Certifications: Active CCIE (Enterprise Infrastructure or Security).Preferred Certification: Cisco DevNet Professional, Palo Alto PCNSE, Juniper JNCIP, ITILv4, or GIAC-GCIH. Security ClearanceU.S. Citizen with ability to obtain DHS Public Trust / Full-Scope BI. Other (Travel, Work Environment, DoD 8570 Requirements, Administrative Notes, etc.)