Systems Engineer X3

About the role

We are seeking an experienced Mid-Level Systems Engineer to support a large-scale, geographically distributed enterprise network environment. This role is ideal for a hands-on network engineering professional with deep experience across LAN, WAN, WLAN, network boundary engineering, routing, switching, network security, configuration management, and Tier III troubleshooting. You will serve as a senior technical resource and escalation point for complex network incidents while supporting network engineering, change management, lab validation, configuration baseline management, and the development of future enterprise network solutions. This position offers the opportunity to support a mission-critical network spanning thousands of devices and hundreds of locations. The successful candidate will work closely with experienced engineering, cybersecurity, architecture, operations, and program teams to improve network availability, security, performance, and reliability.

Responsibilities

• Troubleshoot, analyze, and resolve complex network incidents within a large-scale enterprise environment.
• Configure, maintain, and troubleshoot routers, switches, VLANs, wireless access points, firewalls, network sensors, and other network infrastructure.
• Provide Tier III network engineering and escalation support for high-impact technical issues.
• Serve as a network engineering subject matter expert and technical escalation resource across multiple network disciplines.
• Coordinate with technology vendors and internal engineering teams to resolve complex incidents.
• Apply defense-in-depth and network security principles to protect enterprise infrastructure.
• Troubleshoot networking technologies and protocols, including: LAN, WAN, WLAN, and network boundary technologies; Routing and switching; SD-WAN; MPLS and VPN; OSPF, BGP, and EIGRP; Multicast and switching protocols.
• Collaborate with engineering, architecture, cybersecurity, and operations teams to improve network availability, performance, reliability, and security.
• Develop and maintain Engineering Implementation Plans, or EIPs, for network deployments, upgrades, and configuration changes.
• Create and manage change tickets for deployments, maintenance activities, upgrades, and other network modifications.
• Conduct Root Cause Analysis, or RCA, for recurring incidents and problem-management activities.
• Participate in technical meetings focused on engineering, architecture, and future enterprise network solutions.
• Track engineering and operational work in JIRA within an Agile/SAFe environment.
• Participate in daily stand-ups, retrospectives, Program Increment planning, demonstrations, and other Agile ceremonies.
• Present technical demonstrations, engineering updates, risks, and progress toward Program Increment objectives.
• Establish and maintain version-controlled configuration baselines for routers, switches, firewalls, sensors, and other network devices.
• Maintain accurate records of startup and running configurations, firmware versions, security policies, and associated network data.
• Ensure network configuration changes are documented, peer-reviewed, approved, and backed up in a centralized repository.
• Maintain configuration change-tracking, recovery, and rollback capabilities.
• Verify that network configurations comply with applicable DISA Security Technical Implementation Guides, or STIGs, and organizational cybersecurity requirements.
• Support configuration recovery and operational resilience across the enterprise network.
• Conduct pre-production testing for firmware upgrades, security patches, and network configuration changes.
• Validate proposed changes in isolated lab environments that mirror applicable production network topologies and configurations.
• Test network functionality, device interoperability, security policies, security controls, and performance against established baselines.
• Validate implementation and rollback procedures before production deployment.
• Document test results, technical risks, remediation requirements, and deployment recommendations.