Senior Enterprise Network Engineer

Cigna Health and Life Insurance Company; Missoula (MT); Remote; USD 120,000 - 170,000; Full time

Job summary

Allegiance by Cigna Healthcare is seeking an experienced network engineer to design, implement, and optimize enterprise LAN, WAN, SD-WAN, wireless, and remote-access connectivity across the organization.

You will configure routers, switches, firewalls, load balancers, VPNs, and other network appliances, monitoring performance and responding to incidents with urgency. Collaboration with security, cloud, and application teams is essential.

Qualifications

• 5 or more years of experience supporting, operating, and managing enterprise network infrastructure in large-scale environments.
• Hands-on experience with routing, switching, firewalls, load balancers, wireless networking, SD-WAN, and site-to-site and remote-access VPN technologies.
• Strong knowledge of TCP/IP, TCP/UDP ports, DNS, DHCP, VLANs, network segmentation, performance tuning, and secure network design.
• Experience diagnosing complex outages and performance issues, completing root-cause analysis, and supporting critical business services.
• Ability to work independently, communicate clearly, manage competing priorities, and collaborate across technical and business teams.
• Current CCNA certification.

Responsibilities

• Design, implement, and improve enterprise LAN, WAN, SD-WAN, wireless, and remote-access solutions that deliver reliable, scalable connectivity.
• Configure and support routers, switches, firewalls, load balancers, VPNs, wireless access points, and other network appliances.
• Monitor availability, traffic, and capacity; use data and enterprise monitoring tools to identify risks and improve network performance.
• Lead troubleshooting and root-cause analysis for complex routing, switching, DNS, DHCP, authentication, and connectivity issues, restoring service with urgency and care.
• Strengthen network security by maintaining firewall policies, segmentation, IDS/IPS, NAC, and VPN controls; contribute to vulnerability remediation, hardening, and incident response.
• Partner with server, storage, cloud, security, application, and directory-services teams to integrate network requirements into projects and technology refreshes.
• Coordinate effectively with vendors, service providers, and internal stakeholders during incidents, changes, and planned implementations.
• Maintain accurate network diagrams, inventories, standards, operating procedures, and troubleshooting guides to make knowledge easy to share and reuse.
• Recommend practical improvements that increase reliability, security, performance, and operational efficiency while supporting change-management standards.

Skills

Routing

Switching

Firewalls

VPNs

SD-WAN

DNS

DHCP

VLANs

CCNA

Root-cause analysis

Education

Bachelor's degree in computer science, information technology, or a related field

Job description

Allegiance by Cigna Healthcare is seeking an experienced network engineer to design, implement, and optimize enterprise LAN, WAN, SD-WAN, wireless, and remote-access connectivity across the organization.

You will configure routers, switches, firewalls, load balancers, VPNs, and other network appliances, monitoring performance and responding to incidents with urgency. Collaboration with security, cloud, and application teams is essential.