System Administrator

Job Title: System Administrator Location: Wheeling, IL (Chicagoland area) About George J. Priester Aviation George J. Priester Aviation is a premier aviation services company providing comprehensive aircraft management, charter, maintenance, and flight operations solutions. With decades of experience supporting owner-managed and client-focused flight departments, we are known for our commitment to safety, professionalism, and white-glove service.

Our team operates in a dynamic Part 135 and Part 91 environment, supporting diverse aircraft types and mission profiles across the U.S. and internationally. At George J. Priester Aviation, we value integrity, collaboration, and accountability and we take pride in building long-term careers within aviation.

Overview The Systems Administrator requires hands-on skills in Microsoft Entra ID, Intune/Autopilot, Exchange Online, and Microsoft Defender in a 100% fully cloud managed environment. No on-premise servers. This position also requires Meraki network experience and tier 1/tier 2 helpdesk responsibilities. The ideal candidate is customer-focused, detail-oriented, and comfortable supporting a wide range of technologies.

Key Responsibilities IT Service Management

• Use Freshservice as the primary ticketing and workflow platform.
• Triage, prioritize, and resolve incidents and service requests within SLA.
• Maintain accurate ticket documentation, asset records, and knowledge base articles.

End-User Support

• Provide technical support for Windows 11, macOS, and iPad devices.
• Troubleshoot hardware, software, printing, and peripheral issues.
• Provision iPads, and notebooks to new hires.
• Perform application installs, updates, and configuration.
• Deliver support both remotely and onsite with excellent customer service.

Identity & Access Management

• Manage user accounts, groups, and access policies in Microsoft Entra ID.
• Support MFA, SSO, conditional access, and password resets.
• Handle onboarding/offboarding workflows and identity lifecycle tasks.

Device Management & Provisioning

• Deploy and manage Windows devices using Intune/Autopilot.
• Configure compliance policies, configuration profiles, and security baselines.

Mobile Device Management (MDM)

• Enroll, configure, and support iPads through MDM platforms:

• (MaaS360, Jamf).

• Apply app deployments, restrictions, compliance rules, and remote actions (wipe/lock).

• Maintain accurate inventory and ensure security compliance.

Networking & Connectivity

• Manage our existing Cisco Meraki environment:

• Support Meraki hardware including Access Points, Switches, Firewalls, and Cameras.

• Troubleshoot LAN, VLAN, and WLAN issues.

• Provide Tier 2 support to existing help desk staff.

System Administration

• Perform OS updates, patching, and endpoint security tasks through Microsoft Intune/Defender.
• Work in coordination with our MSSP to ensure a safe and secure environment.
• Support Microsoft 365 applications and Exchange Online cloud services.
• Assist with hardware lifecycle management and asset tracking.

Documentation & Collaboration

• Create and maintain technical documentation and knowledge base articles.
• Collaborate with engineers/manager/MSP on escalations and project work.
• Communicate clearly and professionally with end users and team members.