Senior IT Infrastructure Administrator, Security
HybridMontréal, Quebec, Canada
Job Summary
Take ownership of vulnerability remediation across enterprise systems to reduce backlog and improve patching cadence. Administer and harden Windows Server environments, including Active Directory, DNS, authentication, and certificate services, while supporting Linux administration. Manage certificate lifecycle operations, including TLS/PKI renewals, and work with security platforms such as Privileged Access Management and Cloudflare. Partner with Cybersecurity stakeholders to implement approved controls and improve operational security practices. Requires 8+ years of enterprise systems administration experience, strong scripting skills in PowerShell, and commutable distance to Toronto or Montreal offices.
Required Qualifications
- 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
- 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
- Applicants must be within a commutable distance (within 2 hours or 80 miles) of one of the listed offices
Desired Qualifications
- Experience automating certificate lifecycle processes across environments
- Exposure to SIEM or centralized logging beyond administration, including tuning, alerting, or optimization
- Experience delivering infrastructure or security projects end-to-end
- Experience working in SaaS or cloud-centric environments
- Ability to produce technical documentation, runbooks, and support knowledge transfer
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