Senior Tech Infrastructure Administrator (Network) (Toronto)

The Senior Network Administrator is responsible for the day-to-day management, support, and optimization of the organization’s network infrastructure across on-premises and cloud environments. Acting as a subject matter expert (SME), this role ensures reliable, secure, and high‑performing network services that support business operations.

Key Accountabilities

• Administer, monitor, and maintain network infrastructure including firewalls, switches, and wireless environments.
• Ensure reliable connectivity and performance across LAN/WAN and cloud‑integrated environments.
• Troubleshoot and resolve network issues, serving as an escalation point for complex incidents.
• Support implementation of network upgrades, refreshes, and new deployments.
• Contribute to network design and continuous improvement initiatives focused on scalability and performance.
• Manage and maintain network security controls including firewalls, VPNs, and ...