Senior Network Engineer -Core/IP Infrastructu

Broadband, LLC; Peoria (IL); On-site; USD 80,000 - 125,000; Full time

Job summary

i3 Broadband is seeking a Senior Network Engineer to design, implement, and operate the carrier‑grade IP backbone and aggregation network supporting broadband, voice, and video services. You will drive scalable routing architecture, reliability engineering, traffic optimization, and network automation across a growing fiber footprint.

The role emphasizes advanced routing, high availability, and collaboration with transit providers and peers to ensure multi‑gigabit performance and resilient

Qualifications

• Bachelor’s degree in Computer Science, Telecommunications, Engineering, or related field preferred.
• 8–12+ years in ISP or service provider network engineering environments.
• Experience operating carrier‑grade routing infrastructure and high‑availability IP backbones.
• Certs such as CCNP, CCIE, JNCIP or equivalent preferred.

Responsibilities

• Design and evolve carrier‑grade core and aggregation IP network architecture.
• Implement and manage routing infrastructure with Cisco and Nokia routers.
• Engineer and troubleshoot BGP, OSPF, and IS‑IS routing protocols.
• Create highly resilient topologies with redundancy and traffic engineering.
• Develop network automation using Python, Ansible, Netconf, and APIs.
• Monitor backbone performance and perform deep root‑cause analysis.
• Optimize traffic engineering policies for bandwidth and reliability.
• Support backbone connectivity with transit providers, IXPs, and peers.
• Maintain network documentation and operational procedures.
• Provide Tier‑IV escalation support and participate in on‑call rotations.

Skills

TCP/IP

BGP

OSPF

IS-IS

MPLS

Multicast

CGNAT

DNS

DHCP

IPAM

Automation

Troubleshooting

HA concepts

Education

Bachelor's degree

CCNP

CCIE

JNCIP

Tools

Cisco

Nokia

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Full-Time Professional East Peoria, IL, US

Salary Range: $80,000.00 To $125,000.00 Annually

Job Summary:

The Senior Network Engineer – Core/IP Infrastructure is responsible for designing, implementing, and operating i3 Broadband’s carrier‑grade IP backbone and aggregation network. This role ensures the scalability, resiliency, and performance of the network that powers broadband, voice, and video services across i3’s expanding fiber footprint. The position focuses on advanced routing architecture, network reliability engineering, traffic optimization, and network automation to support multi‑gigabit fiber broadband growth.

Key Responsibilities:

• Design and evolve carrier‑grade core and aggregation IP network architecture supporting broadband services.
• Implement and manage routing infrastructure using platforms such as Cisco and Nokia service provider routers.
• Engineer and troubleshoot routing protocols including BGP, OSPF, and IS‑IS.
• Design highly resilient network topologies with redundancy, geographic failover, and traffic engineering.
• Develop and maintain network automation using Python, Ansible, Netconf, and API‑based configuration tools.
• Monitor backbone performance and perform deep root‑cause analysis on network incidents.
• Optimize traffic engineering policies to ensure efficient bandwidth utilization and service reliability.
• Support backbone connectivity including transit providers, IXPs, and peering partners.
• Maintain network documentation including architecture diagrams, configuration standards, and operational procedures.
• Provide Tier‑IV escalation support for critical network incidents and participate in on‑call rotation.

Qualifications:

Education and Experience:

• Bachelor’s degree in computer science, Telecommunications, Engineering, or related field, preferred
• 8–12+ years of experience in ISP, telecommunications, or service provider network engineering environments.
• An equivalent combination of education and/or experience will be considered
• Extensive experience operating carrier‑grade routing infrastructure.
• Experience designing and supporting high‑availability IP backbone networks.
• Industry certifications such as CCNP, CCIE, JNCIP, or equivalent preferred.

Skills and Competencies:

• Advanced knowledge of TCP/IP networking, IPv4 and IPv6 architecture.
• Strong expertise with BGP, OSPF, and IS‑IS routing protocols.
• Experience with MPLS, multicast routing, and traffic engineering.
• Experience with CGNAT and large‑scale subscriber network environments.
• Knowledge of DNS, DHCP, and IPAM services.
• Experience with network automation and infrastructure‑as‑code practices.
• Strong troubleshooting and analytical skills in high‑availability environments.

Working Conditions:

• Must be able to sit at a desk for extended periods, working at a computer up to 8 hours per day.
• Ability to operate personal computers, telephones, and other common office equipment.
• Able to climb and work on a ladder
• Able to install and remove devices from server racks
• Carry up 30lbs
• Able to work in all weather conditions (snow, rain, etc....)
• Participate in after-hours on call rotation.

i3 Broadband is an equal-opportunity workplace that respects the diversity of our customer base and our team. We will treat customers, employees, and applicants fairly without regard for gender, race, age, or any other characteristics protected by law. Our employment decisions are made on the basis of qualifications, merit, and business needs.