Senior IT Infrastructure Administrator, Security

Role Overview

• 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

• 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

Tech Stack

• Cyber Security
• DNS
• Linux
• Splunk

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!