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Robert Half Technology is seeking a skilled Systems Administrator to support and maintain a mixed Linux and Windows infrastructure in a dynamic, multi-environmental client. This role will be responsible for infrastructure operations, cloud and identity management, networking, and security compliance, while also contributing to ongoing system improvements and documentation.
Job Responsibility:
Administer and maintain Linux (RHEL/Ubuntu) and Windows server environments
Manage Microsoft 365 tenant, including Exchange Online, Entra ID (Azure AD), Conditional Access, and endpoint policies
Support and maintain network infrastructure, including firewalls, VPNs, and segmentation
Perform storage administration and support ongoing infrastructure projects
Manage patching, system updates, and vulnerability remediation across servers and endpoints
Support security and compliance initiatives, including documentation, access control, and audit readiness
Administer source control systems and assist with migrations as needed
Respond to helpdesk tickets and provide end-user support across multiple environments
Maintain and improve technical documentation, runbooks, and knowledge base articles
Participate in on-call rotation for critical system support
Requirements:
Strong Linux systems administration experience (RHEL and/or Ubuntu)
Microsoft 365 administration (Exchange Online, Entra ID/Azure AD, Teams)