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All hired employees are expected to have experience with Microsoft Copilot and / or an approved equivalent AI solution. The Lead Network Engineer serves as the technical subject matter expert responsible for the design, engineering, implementation, and sustainment of CISA’s enterprise network infrastructure. This role ensures delivery of secure, scalable, high-performance network solutions across cloud, on-premise, and hybrid environments in support of CISA’s mission. The Lead Network Engineer provides advanced technical leadership, supports enterprise modernization initiatives, and ensures network environments are resilient, interoperable, and compliant with DHS security requirements. Key Responsibilities Network Architecture & Design Lead design and engineering of enterprise network infrastructure (WAN, LAN, DNS, wireless, and cloud networking) Develop and maintain network architecture designs and supporting documentation Ensure solutions meet performance, scalability, and security requirements Engineering & Implementation Engineer, test, and implement network solutions across CISA facilities and cloud environments Support deployment of connectivity to cloud services (e.g., hybrid and multi-cloud architectures) Ensure all implementations meet DHS and CISA security standards Technical Expertise & Tier 3 Support Provide advanced (Tier 3) troubleshooting and escalation support for network incidents and issues Lead root cause analysis and resolution of complex network problems Provide expert technical guidance to engineering teams and Government stakeholders Infrastructure Operations & Optimization Maintain the integrity and performance of enterprise network systems Support monitoring, capacity planning, and performance optimization Ensure network reliability, availability, and resilience across environments Configuration & Change Management Develop and implement network-related Change Requests (CRs) and documentation Support configuration management processes and review gates Coordinate with stakeholders for approvals, implementation, and communication Testing & Integration Conduct testing of hardware, software, and network solutions prior to production deployment Develop and execute test plans and validate system performance and integration Produce test reports and support implementation plans Security & Compliance Implement and maintain network security controls in accordance with DHS policies and NIST standards Support vulnerability management, patching, and system hardening Ensure compliance with federal security requirements and operational standards Required Qualifications Education Bachelor’s degree in Engineering, Computer Science, Information Systems, or related field Additional experience may substitute for formal education (per Government guidance) Experience Minimum 10 years of experience in network engineering and design Demonstrated experience with enterprise network infrastructure and large-scale environments Experience supporting federal IT systems and mission-critical operations Desired Qualifications Experience with cloud networking (AWS, Azure, hybrid cloud environments) Familiarity with DHS/CISA network environments and security requirements Experience integrating identity, access management, and enterprise services Relevant technical certifications (e.g., CCNP, CCIE, CISSP) Key Competencies Enterprise network architecture and design Advanced troubleshooting and problem resolution Cloud and hybrid network engineering Security-focused network implementation Collaboration and technical leadership Work Environment & Requirements Ability to support classified environments up to Top Secret/SCI clearance Required to support on-site operations at DHS facilities with some telework flexibility May require support during non-st