Administrator, Network Infrastructure

Time Type

Regular

The Network Administrator is responsible for the design, operation, and security of complex wired, wireless, and Internet-facing network infrastructures spanning multiple data centers and locations. The role requires expertise across enterprise routing, firewalling, VPNs, DNS, load balancing, security appliances, and large-scale wireless networks.

• Design, implement, and maintain enterprise network architectures, including LAN, WAN, wireless, data center, and Internet-edge environments.
• Administer, configure, and troubleshoot Forti Gate/Juniper SRX firewalls, including policies, NAT, routing, and VPNs.
• Configure, maintain, and support Cisco Layer 2 and Layer 3 switching, including VLANs, spanning tree, Ether Channel, and inter-VLAN routing.
• Deploy, operate, and optimize Cisco / Ruckus wireless networks, including:
• Controller-based and cloud-managed WLAN architectures
• SSID design, RF tuning, roaming optimization, and wireless security
• Deploy, operate, and support F5 Load Balancers, including LTM (DNS/GTM experience a strong plus).
• Design, implement, and troubleshoot dynamic routing protocols, including BGP and OSPF.
• Design, implement, and support IPsec and SSL VPN solutions for site-to-site and remote access connectivity.
• Operate and troubleshoot DNS services in an Anycast environment.
• Perform advanced network and wireless troubleshooting across complex, multi-vendor environments.
• Participate in network design reviews, infrastructure upgrades, and large-scale migrations.
• Ensure high availability, performance, and security of all network services.
• Maintain accurate network documentation, diagrams, and operational standards.
• Collaborate closely with security, systems, cloud, and application teams to support business and technical objectives.

• Bachelor's degree in Computer Science, Information Technology, or a related field.

• 4+ years of experience in network administration or network engineering within enterprise or service-provider environments.
• Hands‑on experience administering and supporting firewalls, Cisco Layer 2 and Layer 3 switching, wireless networks, and Load Balancers.
• Experience operating enterprise‑scale routing, switching, and security infrastructures in complex production environments.
• Proven experience designing, implementing, and supporting IPsec and SSL VPN solutions for site-to-site and remote access connectivity.
• Experience designing scalable, secure, and highly available wired and wireless network infrastructures.
• Demonstrated ability to troubleshoot complex, multi‑vendor network issues in mission‑critical environments.
• Ability to operate effectively in a fast‑moving environment with competing priorities and production impact.
• Willingness to participate in an on‑call rotation for after‑hours support and incident response.

• Strong understanding and hands‑on experience with routing and network protocols including OSPF/OSPFv3, BGP and MP‑BGP, Spanning Tree (STP/RSTP/MST), PIM‑SSM, IGMP v2/v3, HSRP, VRRP, and MPLS.
• Working knowledge of DNS.
• Good understanding of network and application security principles including DDoS attack types, mitigation strategies, Web Application Firewall (WAF) placement, network segmentation, and Internet‑edge security design.
• Familiarity with large‑scale wireless design considerations including RF planning, roaming behavior, and high‑density environments.
• Understanding of DDoS mitigation technologies and appliances, including inline and out‑of‑band protection.
• Exposure to cloud networking concepts, preferably Google Cloud Platform (GCP).
• Familiarity with ITSM and work management tools such as Jira and Service Now.
• Experience creating and maintaining network diagrams and documentation using tools such as Microsoft Visio or Lucidchart.

• Flexibility: we support work and personal life balance.
• Fun: we maintain a positive, collaborative environment.
• Discounted services: you will receive access to client services at reduced rates.
• Rewarding Pay: attractive compensation packages with performance incentives.
• Benefits: comprehensive health, dental, vision, and insurance coverage.
• Career Evolution: opportunities to develop and advance your career.
• Technology: manage, influence, and shape cutting‑edge technology solutions.

Location:

Montréal, QC

Cogeco Connexion Inc

If you need any accommodations to apply or during the recruitment process, please contact us confidentially at