[Remote] Senior IT Infrastructure Administrator, Security

Note: The job is a remote job and is open to candidates in USA. Confluence is a leading global technology solutions provider to the investment management industry. They are seeking a Senior IT Infrastructure Administrator focused on hands-on infrastructure security, vulnerability remediation, and improving security practices across enterprise systems.

Responsibilities

• 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

Skills

• 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

Benefits

• 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!
• We offer flexible working options for all employees.

Company Overview

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