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 

* 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. 

* 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. 

* 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 

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 

10 + years supporting DHS WAN/LAN environments. 

Experience with DHS cloud networking and automation (Infrastructure as Code). 

Experience leading network modernization projects for DHS