Senior Network Systems Engineer

Engineer enterprise networks, cybersecurity, and cloud infrastructure at OSL Retail Services from the corporate office in Mississauga, Ontario.

As Senior Systems Engineer, you will manage corporate LAN, WAN, wireless, firewall, VPN, and cloud networking environments. The work includes Windows, Linux, Microsoft Azure, Fortinet infrastructure, and complex technology projects. You will design, implement, secure, troubleshoot, and evolve systems while supporting IT service improvement.

Key Responsibilities:

• Administer and harden Fortinet firewalls, switches, access points, and VPNs
• Manage on-premises and Azure cloud infrastructure environments
• Administer Windows, Linux, and Azure-based application servers
• Monitor capacity, performance, security, and IT landscape changes
• Document configurations, mappings, processes, and problem management records

Requirements:

• Five or more years designing complex enterprise network environments
• Expertise with firewalls, switches, access points, VPNs, and WAN solutions
• Advanced Windows and Linux administration and troubleshooting experience
• PowerShell, Bash, or Python scripting and automation experience
• Microsoft Azure and Fortinet certifications strongly preferred

Apply senior network engineering expertise across Fortinet, Windows, Linux, Azure, cybersecurity, and enterprise infrastructure at OSL.