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Senior Network Engineer - Infra, Data Center & Fabric, Juniper

📍 Location
toronto, on
⏰ Job Type
Full-time
📅 Posted
June 04, 2026
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Job Description

Role and Responsibilities

  • Monitor and administer enterprise LAN/WAN, data center, and wireless environments (Nexus, Catalyst, ASA/Firepower, SD WAN).
  • Triage, troubleshoot, and resolve L1–L3 network incidents and performance issues; escalate to vendors as needed.
  • Manage IP addressing, VLANs, trunking, EtherChannel/Port Channel, VPC, and routing adjacencies (OSPF/BGP/EIGRP).
  • Maintain and optimize Cisco Nexus switching (e.g., 5K/7K/9K), including VPC, HSRP/VRRP, fabric modules, and FEX.
  • Support firewall rule changes, NAT, site to site and remote access VPNs; collaborate with security on policy enforcement.
  • Ensure network monitoring, alerting, and logging are operational (e.g., SolarWinds, LogicMonitor, ThousandEyes, NetFlow).
  • Provide on call support within a rotation and support scheduled after hours changes.
  • Plan and execute network changes (migrations, upgrades...

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