NETWORK ENGINEER - PUB SEC

Lumen is the trusted network for the AI‑powered world, connecting people, data, and applications through our expansive fiber network and connected ecosystem. We enable secure, high‑performance connectivity across cloud, edge, and AI workloads for enterprises, governments, and communities. At Lumen, you’ll work on infrastructure customers rely on today and build for what’s next, where performance, security, and resilience matter. This is a high accountability environment where bold ideas drive real innovation for our customers, partners, and industry. The work is challenging, expectations are clear, and trust is built into how we operate. If you’re ready to take ownership, deliver meaningful impact, and help shape the future of AI‑ready connectivity, join us today. The Role 
 The Lead IT Systems Engineer is a Network Engineer responsible for analysis, design, installation, configuration, testing, maintenance, and repair of laboratory network infrastructure and applications with a focus on Layer 2/Layer 3 protocols and technologies to meet customer requirements within applicable standards and regulations. TS/SCI security clearance required.   The Main Responsibilities 
 Maintain health of laboratory network equipment, such as switches, routers, firewalls, and networking tools and applications. Lead technical projects through its entirety: research, conceptualization, feasibility assessment, design, procurement, lab test and evaluation, implementation planning, training, documentation, and transition to the operational environment. Create technical documents including network drawings, test plans, test reports, implementation plans, and white papers. Collaborate in the design of the network enterprise including IP address schemes, routing/switching, segmentation, and security. Serve as Tier III support for an enterprise network operations center through in-depth analysis of complex networking problems. Provide mentoring and technical/engineering advice to junior engineers. Knowledgeable in security requirements and techniques for protecting computer systems/networks from attacks, viruses, data tampering, unauthorized system entry, and other emerging threats. Continue education/training in disciplines necessary to perform duties. Any other duties as assigned by management. What We Look For in a Candidate 
 Qualifications & Critical Skills Network Engineer, Network Administrator with expertise in Layer 2 and Layer 3 protocols and technologies: IS-IS, BGP/MP-BGP (multi AS) and MPLS routing protocols, Resource Reservation Protocol (RSVP), Label Distribution Protocol (LDP), MPLS Layer-2/Layer-3 Virtual Private Network (VPN), OSPF, Multicast, etc. IPV4/IPv6 management protocols, Filter Based Forwarding (FBF) Multi-Hop Bidirectional Forwarding Detection (MBFD) Ethernet Operation, Firewalls including Access Control List (ACL), Operation Administration and Maintenance (OAM) Protocol and Network Management with 802.1Q and VRRP/HSRP Certificate Authority Server, ACE/SecureID Server, TACACS+, RADIUS, FTP/SFTP/TFTP, SSH, NTP, SNMP Proficient with security protocols: 802.1x, IPSEC, MACSEC, SSL/TLS, TACACS+, RADIUS, etc. Experience with router regression testing. Experience writing technical documents. Familiarity with COMSEC practices and cryptographic devices. Proficient with test tools, e.g. Ethernet test sets, packet captures, protocol analyzers, and the ability to analyze test data. Computer literate in MS Office apps and MS Visio. Must possess considerable business acumen. Ability to quickly adapt to advancing technologies and procedural changes. Ability to coordinate and communicate effectively with other technologists and business partners to maintain high service levels in a demanding environment. Ability to work well in a team environment. Excellent verbal, written and analytical skills. Technical certifications CCNA or JNCIA required. CCNP or JNCIP preferred. Education or Equivalent Experience Bachelor’s