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Senior IT Infrastructure Administrator, Security
ConfluenceSenior 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.
Tech Stack
Tools & technologiesCyber 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!
ATS Keywords
✓ Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
Enterprise Systems AdministrationLinux AdministrationActive DirectoryDNS ManagementTLS/PKI ManagementPatchingSecurity Controls ImplementationVulnerability ManagementGroup Policy ManagementAuthentication Management
Soft Skills
Problem SolvingCollaborationOwnership