Senior IT Infrastructure Administrator, Security

Department: IT - Information Technology

Employment Type: Permanent - Full Time

Location: Montreal, Canada

Reporting To: Radek Hruby

Description

Location - Canada - Toronto or Montreal

More about the role & team

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. 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.

This is not a purely advisory or monitoring position. 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.

If you enjoy hands-on work, broad technical exposure, and the opportunity to improve security posture in a meaningful way, this is a role where you can make a clear and measurable difference

Why should you apply?

• Take ownership of vulnerability remediation across enterprise systems, helping reduce backlog and improve remediation delivery at scale.
• Improve patching cadence, configuration hygiene, and secure operational practices across infrastructure environments.
• 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

What skills and experience do I need to succeed?

• 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

• 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

What do we offer?

Confluence offers generous benefit packages for team members. As a growing, global organization, we are always looking for ways to ensure that our employees can access benefits that matter to them and their families. This includes:

🕚 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!

More about the Location

We offer flexible working options for all employees.

#LI-Hybrid