We are looking for a Network Administrator to support and maintain reliable network operations in North York, Ontario. This role focuses on ensuring secure connectivity across enterprise environments, resolving performance issues, and helping keep network infrastructure stable and well documented. The successful candidate will work with routing, firewalls, and wide area connectivity while contributing to controlled network changes and ongoing operational improvements.

Responsibilities:

• Administer and support enterprise network infrastructure, including routing, switching, firewall technologies, and wide area connectivity.

• Investigate and resolve complex network outages, latency concerns, and connectivity problems to maintain dependable service.

• Implement network modifications in production environments by following established change management practices and minimizing operational risk.

• Monitor network performance and apply traffic prioritization and bandwidth management techniques to improve availability and efficiency.

• Maintain accurate technical records, diagrams, and operational documentation to support supportability and knowledge sharing.

• Collaborate with internal teams to address incidents, service requests, and recurring infrastructure issues in a timely manner.

• Support cloud-delivered networking and security platforms, including firewall and software-defined wide area solutions where applicable.

• Contribute to network security operations by assisting with access controls, traffic inspection, and protective measures across the environment.

• Minimum of 5 years of experience in a Network Administrator, Network Engineer, or similar infrastructure support role within enterprise environments.
• Strong knowledge of TCP/IP networking, routing principles, firewall administration, and local and wide area network design concepts.
• Proven ability to troubleshoot advanced network performance and connectivity issues across production systems.
• Experience carrying out network changes under formal change control processes.
• Solid written and verbal communication skills, with the ability to produce clear technical documentation.
• Hands-on experience with router, switch, server, and configuration management activities.
• Familiarity with ITIL-based incident or service management practices.
• Experience with cloud-based firewall, VPN, SD-WAN, or Cato Networks solutions is considered a strong asset.

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