Senior IT Infrastructure Administrator, Security – Azure NXT

Confluence

Senior IT Infrastructure Administrator focusing on security controls and vulnerability remediation within IT Infrastructure team. Hands-on role improving security posture across enterprise systems.

Posted 5/25/2026full-timeBoston • Massachusetts, Pennsylvania • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

CloudCyber SecurityDNSLinuxSplunk

About the role

Key responsibilities & impact

This role focuses on strengthening infrastructure security by directly implementing and remediating security controls across enterprise systems.
It sits within the IT Infrastructure team and works closely with Cybersecurity, with a clear emphasis on execution—addressing vulnerabilities, improving patching cycles, and ensuring systems are securely configured across Windows and Linux environments.
A key priority for this role is reducing a significant backlog of vulnerabilities and improving how remediation is delivered at scale.
The role also takes ownership of initiatives such as certificate lifecycle management and the effective use of security platforms including Privileged Access Management and Cloudflare.
This is a hands-on position where success is measured by tangible improvements in security posture and operational resilience.
This role suits a senior infrastructure professional who enjoys working across multiple systems, solving practical security challenges, and taking ownership of outcomes. It offers the opportunity to work on high-impact issues with visibility across teams, making it well-suited to candidates looking to broaden their security exposure while remaining close to infrastructure.

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
Experience automating certificate lifecycle processes across environments (Desirable)
Exposure to SIEM or centralized logging beyond administration, including tuning, alerting, or optimization (Desirable)
Experience delivering infrastructure or security projects end-to-end (Desirable)
Experience working in SaaS or cloud-centric environments (Desirable)
Ability to produce technical documentation, runbooks, and support knowledge transfer (Desirable)

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

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Applicant Tracking System Keywords

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Hard Skills & Tools

enterprise systems administrationWindows ServerActive DirectoryDNSLinux administrationcertificate lifecycle managementTLSPKIscriptingPowerShell

Soft Skills

problem-solvingownershipcollaborationcommunicationorganizational skills