Senior Network Administrator

Key Responsibilities:

• This is a hybrid role and has a minimum requirement of 2+ days in the Toronto office per week.


Network Design & Operations 
• Design, implement, and maintain secure and scalable enterprise and cloud networking infrastructure 
• Configure and manage routing, switching, firewalls, VPNs, load balancers, and transport networks.
• Administer core network services such as DHCP, VLANs, dynamic routing protocols, SD-WAN, etc 
• Deploy and manage Arista, Fortinet, and other network devices
• Support structured cabling systems (fiber, copper) and maintain up-to-date network topology diagrams
• Work with network vendors and service providers to deliver resilient and high-performance connectivity


Monitoring, Performance & Troubleshooting 
• Operate and improve the network monitoring stack to alert on faults, performance, capacity, and security issues
• Proactively monitor and optimize network health, capacity, and throughput
• Lead root cause analysis and resolution of complex incidents
• Utilize advanced diagnostic tools and network management platforms (e.g., Wireshark, tcpdump, NetDisco, Eve-NG, Netbox) to investigate and resolve issues


Security & Compliance 
• Implement and enforce network security policies, segmentation, and access controls 
• Configure and support encryption and tunneling protocols (WireGuard/Tailscale, IPsec, SSL VPNs) 
• Collaborate with security teams on vulnerability management, audits, and incident response
• Ensure alignment with ITIL-based practices for Change, Incident, and Problem Management


Automation & Infrastructure as Code 
• Manage networks programmatically, avoiding manual CLI-driven changes
• Automate network provisioning and configuration with Ansible, Python, Bash, or similar tools 
• Use Infrastructure as Code (IaC) to deploy and manage repeatable, scalable network infrastructure
• Integrate networking workflows with CI/CD pipelines (e.g. GitLab CI) to validate and test configurations
• Contribute to the adoption of software-defined networking (SDN) technologies such as Arista CloudVision


Collaboration & Documentation 
• Partner with network architects to scale and evolve the terrestrial and cloud network that connects ground stations, user segments, and the core
• Work cross-functionally with Networking, engineering, and operations to deliver resilient solutions
• Maintain comprehensive network documentation, diagrams, and runbooks 
• Mentor junior staff and share knowledge across the team
• Coordinate with vendors, contractors, and facilities during deployments and upgrades

Required Skills & Qualifications:

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or equivalent practical experience
• 5+ years of hands-on experience supporting mission-critical networks 
• Deep protocol knowledge of TCP/IP, routing (BGP, OSPF), IPv4/IPv6, VLANs, spanning-tree
• Proven experience with enterprise-grade networking devices (e.g., Cisco, Arista, Aruba, Fortinet, or equivalent)
• Experience with cloud networking (AWS VPC, Azure, VPNs, Security Groups)
• Proficiency with diagnostic tools and performance monitoring platforms
• Strong problem-solving skills, attention to detail, and ability to operate in time-sensitive environments
• Excellent written and verbal communication skills, including the ability to explain technical concepts to non-technical stakeholders

Bonus Points:

• Experience with container networking (Docker, Kubernetes)
• Linux/Unix networking skills (namespaces, VRFs, bridges, iptables, route tables)
• Familiarity with service provider technologies such as MPLS 
• Knowledge of wireless networking standards (802.11 Wi-Fi, RF analysis, site surveys)
• Familiarity with structured cabling best practices (e.g., BICSI standards)
• Experience with observability tools (Prometheus, Zabbix, Nagios, Grafana)
• Industry certifications (Cisco, Juniper, AWS, Azure, Arista, Aruba, Fortinet, or equivalent)