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