Senior IT System Administrator

IT Operations and Service Ownership, 40% 

• Own assigned IT services, workflows, and operational processes with limited oversight. 

• Troubleshoot complex infrastructure, system, access, and application issues. 

• Support employee onboarding and offboarding, access provisioning, system configuration, and lifecycle management. 

• Coordinate operational changes and improvements across IT, Security, Engineering, business teams, and vendors. 

• Maintain clear documentation for systems, procedures, standards, and changes. 

• Mentor teammates, share knowledge, and help raise the technical bar of the team. 

Systems, Identity, and Cloud Administration, 30% 

• Administer, maintain, and improve Ubuntu Linux servers and Windows-based environments. 

• Manage Microsoft 365 services, including Entra ID, Exchange Online, SharePoint, Teams, access policies, groups, permissions, and identity workflows. 

• Support endpoint management and device compliance through tools such as Intune. 

• Monitor system health, performance, capacity, backups, and reliability. 

• Investigate recurring issues, identify root causes, and implement lasting fixes. 

• Support cloud and SaaS services, including access controls, configuration, integrations, monitoring, and routine administration. 

Networking and Infrastructure, 15% 

• Support internal infrastructure across servers, networking hardware, cloud services, identity systems, and business applications. 

• Troubleshoot switches, firewalls, VPNs, DNS, DHCP, routing, and internal connectivity. 

• Perform basic network and firewall configuration where needed. 

• Partner with Security and Engineering on infrastructure changes, network reliability, access controls, and operational requirements. 

• Help identify gaps in monitoring, backup and recovery, reliability, and business continuity. 

Automation, Integrations, and Improvement, 15% 

• Write and maintain scripts using Bash, Python, PowerShell, Ansible, or similar tools. 

• Build and improve integrations between internal systems, SaaS tools, identity providers, and business workflows. 

• Support workflow automation and internal productivity improvements for teams across the company. 

• Help evaluate, deploy, and administer enterprise tools, collaboration platforms, and workflow integrations. 

• Lead small improvement projects that strengthen reliability, documentation, compliance readiness, or team efficiency. 

• Experience: 6+ years of experience in systems administration, infrastructure, internal IT operations, managed services, or a related technical role. 

• Ownership: Ability to own assigned systems, services, or projects with limited oversight. 

• Linux: Strong Ubuntu or Linux administration experience, including troubleshooting services, logs, permissions, packages, storage, certificates, and networking. 

• Microsoft 365 and Identity: Hands-on experience with Microsoft 365, Entra ID, Exchange Online, SharePoint, Teams, access management, groups, permissions, SSO, Conditional Access, and enterprise applications. 

• Endpoint Management: Experience supporting endpoint management or device compliance, such as Intune. 

• Networking: Practical knowledge of DNS, DHCP, TCP/IP, routing, firewalls, VPNs, and internal connectivity. 

• Automation: Experience writing scripts or automations using Bash, Python, PowerShell, Ansible, or similar tools. 

• Integrations: Experience supporting SaaS tools, APIs, workflow automation, or business system integrations. 

• Security Mindset: Ability to support secure IT operations, access controls, audit readiness, and compliance-related work. 

• Mentorship: Ability to guide teammates, share knowledge, and improve team practices. 

• Communication: Clear written and verbal communication, including the ability to explain technical decisions, risks, trade-offs, and recommendations.