Senior IT Infrastructure Administrator, Security

Confluence

Senior infrastructure professional responsible for vulnerability remediation and security improvements across enterprise systems at Confluence. Hands-on role involving Windows and Linux environments with strong collaboration with Cybersecurity team.

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

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in enterprise systems administration with a focus on vulnerability remediation, certificate lifecycle management, and the administration of Windows and Linux environments. Proficient in applying security controls and utilizing security platforms to enhance operational resilience.

Highest-signal resume keywords

Windows Server AdministrationCertificate Lifecycle ManagementVulnerability RemediationPrivileged Access Management (PAM)Scripting/Automation (PowerShell)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Enterprise Systems AdministrationLinux AdministrationActive DirectoryDNS ManagementTLS/PKI ManagementPatchingSecurity Controls ImplementationVulnerability ManagementGroup Policy ManagementAuthentication Management

Soft Skills

Problem SolvingCollaborationOwnership

Tools & Technologies

CloudflareSplunkSumo LogicPrivileged Access Management (PAM)

Industry Keywords

Infrastructure SecurityOperational ResilienceSecurity PlatformsLogging and MonitoringCybersecurity

Tech Stack

Tools & technologies

Cyber SecurityDNSLinuxSplunk

About the role

Key responsibilities & impact

Hands-on infrastructure security role with real ownership and visible impact
We’re looking for a senior infrastructure professional who enjoys solving practical security challenges and improving how security is delivered across enterprise systems.
Take direct ownership of vulnerability remediation, help improve patching cycles, and ensure systems are securely configured and operationally resilient.
Contribute to key initiatives including certificate lifecycle management and the operational use of security platforms such as Privileged Access Management and Cloudflare.
Administer and harden Windows Server environments, including Active Directory, Group Policy, DNS, authentication, and certificate services, with supporting Linux administration.
Support certificate lifecycle management, including TLS/PKI, renewals, and ongoing certificate operations.
Work with core security platforms such as PAM solutions and Cloudflare, and support logging and monitoring platforms such as Sumo Logic or Splunk.
Partner closely with Cybersecurity and infrastructure stakeholders to implement approved controls, remediate findings, and improve how security is operationalized across environments.
Applicants must be within a commutable distance (within 2 hours or 80 miles) of one of the listed offices

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
Plus many more!