Senior Network Engineer: Cisco Infra Refresh

Affinity; Toronto; On-site; CAD 110,000 - 140,000; Full time

Benefits offered by this job

Affinity Earn

Up to $4,000/year referral bonus for a

Job summary

Affinity is seeking a hands-on Senior Network Engineer to support a large-scale Cisco infrastructure refresh across a complex enterprise environment. You will execute approved designs through build, testing, and post-cutover validation in a delivery-focused role.

You will own end-to-end changes, including configuration, change management, troubleshooting, documentation, and maintenance windows, in a heavily regulated setting with ITIL change control.

Qualifications

• 8+ years hands-on enterprise network engineering.
• Strong Cisco routing and switching expertise in large environments.
• Experience delivering large hardware refresh or migration programs.

Responsibilities

• Execute switch and router replacements across data centre, branch, and campus environments.
• Build and standardize configurations from templates; identify drift.
• Own changes end-to-end: write change records, CAB, execute, validate, close.
• Troubleshoot L2/L3 issues during/after cutovers under time pressure.
• Maintain up-to-date as-builts, diagrams, and IPAM records.
• Coordinate with app teams, security, facilities, and vendors; work across multiple sites.

Skills

Cisco routing & switching

BGP OSPF EIGRP

CCNP or CCIE

ITIL change management

Automation: Python/Ansible/Netmiko

Regulated environments

Tools

Python

Ansible

Netmiko

ServiceNow ITSM

Job description

Affinity is seeking a hands-on Senior Network Engineer to support a large-scale Cisco infrastructure refresh across a complex enterprise environment. You will execute approved designs through build, testing, and post-cutover validation in a delivery-focused role.

You will own end-to-end changes, including configuration, change management, troubleshooting, documentation, and maintenance windows, in a heavily regulated setting with ITIL change control.