IT Systems Administrator

Key Responsibilities

• Administer and maintain Windows and Linux server environments across on-premises and cloud-hosted infrastructure.
• Manage core infrastructure services including Active Directory, Okta, Entra ID, DNS, DHCP, Group Policy, certificate services, and identity management platforms.
• Support virtualization platforms including VMware and/or Hyper-V.
• Maintain enterprise storage, backup, disaster recovery, and business continuity solutions.
• Monitor system health, performance, availability, and capacity across infrastructure platforms.
• Participate in infrastructure lifecycle management, including system upgrades, migrations, and decommissioning activities.
• Support Microsoft 365 services including Exchange Online, Teams, SharePoint Online, and Entra ID.
• Affiliate with administration of Microsoft Azure, AWS, and other cloud-hosted infrastructure services.
• Assist with hybrid identity and hybrid infrastructure environments.
• Participate in cloud migration and infrastructure modernization initiatives.

Security & Compliance

• Implement and maintain infrastructure security controls in partnership with Information Security teams.
• Perform vulnerability remediation, patch management, system hardening, and access reviews.
• Support endpoint security, identity security, privileged access management, and logging initiatives.
• Affiliate with compliance, audit, and governance activities.
• Investigate and resolve infrastructure-related security incidents.

Automation & Operational Excellence

• Create and maintain infrastructure documentation, standards, diagrams, and operating procedures.
• Improve operational efficiency through automation, monitoring, and process optimization.
• Participate in after-hours support and on-call rotations as needed.

Collaboration & Leadership

• Lead infrastructure projects from planning through implementation.
• Mentor junior administrators and technical support personnel.
• Collaborate with networking, security, application, and business teams to deliver technology solutions.
• Work with vendors and service providers to support infrastructure initiatives.