Senior IT Infrastructure Administrator, Security – Azure NXT

Confluence

Senior IT Infrastructure Administrator focusing on security and infrastructure management at Confluence. Tackles vulnerabilities and drives security improvements across enterprise systems.

Posted 5/22/2026full-timeMassachusetts, Pennsylvania • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

Cyber SecurityDNSLinuxSplunk

About the role

Key responsibilities & impact

Strengthening infrastructure security by directly implementing and remediating security controls across enterprise systems.
Works closely with Cybersecurity, focusing on execution—addressing vulnerabilities, improving patching cycles, and ensuring systems are securely configured across Windows and Linux environments.
Reducing a significant backlog of vulnerabilities and improving remediation delivery at scale.
Ownership of initiatives such as certificate lifecycle management and effective use of security platforms including Privileged Access Management and Cloudflare.
Hands-on position measuring success by tangible improvements in security posture and operational resilience.
Opportunity to influence how security is implemented and improved at scale, working across multiple systems and solving practical security challenges.

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 resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

enterprise systems administrationWindows ServerActive DirectoryDNSLinux administrationcertificate lifecycle managementTLSPKIscriptingautomation

Soft Skills

problem-solvingcollaborationownershipinfluencecommunication