Network Engineer

Senior Network Engineer

Washington, DC Pay: $140k - $175k MUST: Experienced Senior Network Engineer Must have Top Secret clearance 10 years of experience designing, implementing, securing, troubleshooting, and maintaining enterprise networks. Experience with Catalyst 9000 Series or ThousandEyes Experience with Cisco Secure Routers, Cisco ISE, 802.1X, Catalyst Center, and wireless controllers/access points. Experience with BGP, OSPF, VLANs, VRFs, QoS, multicast, spanning tree, link aggregation, segmentation, high availability, and redundant WAN architectures. Experience with enterprise firewalls, IDS/IPS, remote-access and site-to-site VPNs, ZTNA, DNS, DHCP, IPAM, NAC, and secure hybrid connectivity. Experience integrating firewall, VPN, ISE, DNS, NetFlow, syslog, and cloud-network telemetry into SIEM platforms such as Microsoft Sentinel. Experience with vulnerability remediation, incident-response triage, traffic analysis, log correlation, network containment, and evidence preservation. Experience performing root cause analysis and produce clear technical findings, corrective actions, procedures, and operational documentation. Bachelor's preferred

DUTIES: Support enterprise routing, switching, internet connectivity, wireless infrastructure, VPN/ZTNA services, firewalls, and data center interconnections. Administer Cisco Catalyst 9000 switches, Cisco Secure Routers, Cisco ISE, 802.1X, Catalyst Center, ThousandEyes, and Cisco wireless systems. Monitor network availability, performance, capacity, device health, routing changes, alerts, and anomalies. Maintain network, firewall, VPN, DNS, wireless, cloud, syslog, and flow-log integrations with Microsoft Sentinel or another approved SIEM. Support multi-site data center connectivity, redundancy, failover, path validation, performance monitoring, and resiliency improvements. Support AWS hybrid connectivity, including routing, VPNs, security groups, network ACLs, cloud logging, and troubleshooting. Manage site-to-site IPsec tunnels, enterprise firewalls, remote-access VPN/ZTNA, network access control, and wireless authentication. Perform DNS, routing, packet capture, latency, and network-path analysis across on-premises, cloud, ISP, and partner environments. Lead outage response and root cause analysis, coordinate service restoration, and recommend corrective actions. Maintain network and security diagrams, configuration standards, SOPs, runbooks, traffic flows, logging paths, and recovery documentation.

Quadrant is an affirmative action/equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, status as a protected veteran, or status as an individual with a disability. "Healthcare benefits are offered to all eligible employees according to compliance mandated by the Affordable Care Act".