Senior IT Infrastructure Administrator, Security

Confluence

Senior Infrastructure professional solving practical security challenges and improving enterprise systems security at Confluence. Focused on implementation, remediation, and secure operations across Windows and Linux environments.

Posted 7/8/2026full-timeMontreal • 🇨🇦 CanadaSeniorWebsite

Tech Stack

Tools & technologies

Cyber SecurityDNSLinuxSplunk

About the role

Key responsibilities & impact

We’re looking for a senior infrastructure professional who enjoys solving practical security challenges and improving how security is delivered across enterprise systems.
This role sits within the IT Infrastructure team and works closely with Cybersecurity, with a strong focus on implementation, remediation, and secure operations across Windows and Linux environments.
You’ll take direct ownership of vulnerability remediation, help improve patching cycles, and ensure systems are securely configured and operationally resilient.
You’ll also contribute to key initiatives including certificate lifecycle management and the operational use of security platforms such as Privileged Access Management and Cloudflare.

Requirements

What you’ll need

8+ years of experience in enterprise systems administration or IT infrastructure
Strong generalist infrastructure background with the ability to work across multiple systems and environments
Hands-on experience with Windows Server (Active Directory, DNS, authentication, certificates) and working knowledge of Linux administration
Experience managing certificate lifecycle (TLS/PKI), including renewal and ongoing management (key priority)
Exposure to security tools such as Privileged Access Management (PAM) and Cloudflare (WAF/edge security)
Experience with logging/monitoring platforms (e.g., Splunk, Sumo Logic or similar)
Proven ability to remediate vulnerabilities hands-on, including patching and reducing backlog across systems
Strong scripting/automation skills (PowerShell required)
Ability to apply security controls across infrastructure and prevent misconfigurations

Benefits

Comp & perks

Generous Time Off packages including additional half days with each public holiday in your location.
Global Career Development opportunities
Social Events
Referral Bonus scheme - Upto $3,000 per successful referral

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Enterprise Systems AdministrationVulnerability RemediationPatch ManagementWindows ServerLinux AdministrationCertificate Lifecycle ManagementScriptingPowerShellSecurity ControlsConfiguration Management