IT Systems & Network Administrator

CHRISTIE; Belle Isle (FL); On-site; USD 85,000 - 120,000; Full time

Job summary

Christie is seeking a hands-on IT professional to manage and support our Microsoft infrastructure, cloud services, endpoints, and network environment. The ideal candidate can troubleshoot across multiple technologies and own day-to-day operations, security, and infrastructure improvements.

This role requires hands-on management of Windows Server, Active Directory, Exchange Online, and Entra ID, with responsibility for security, documentation, and vendor coordination.

Qualifications

• Minimum of 5 years' hands-on IT infrastructure experience.
• Must have a valid passport and be able to travel internationally.

Responsibilities

• Maintain reliable and secure server, cloud, endpoint, and network services.
• Diagnose and resolve issues across identity, devices, applications, and connectivity.
• Manage access controls, security policies, updates, and configuration changes.
• Maintain infrastructure documentation, network diagrams, and operating procedures.
• Support infrastructure upgrades and coordinate with vendors when needed.
• Communicate clearly with technical colleagues and nontechnical users.

Skills

PowerShell scripting

Automation

Security best practices

Education

Relevant certifications encouraged

Tools

Windows Server 2022/2025

Active Directory

Exchange Online

Microsoft Entra ID

Intune

Wi‑Fi management

Cisco Meraki

Sophos

NPS (RADIUS)

Ubiquiti Wi‑Fi

Job description

We are seeking a hands-on IT professional to manage and support our Microsoft infrastructure, cloud services, endpoints, and network environment. The ideal candidate can troubleshoot across multiple technologies and own day-to-day operations, security, and infrastructure improvements.

Key responsibilities

• Maintain reliable and secure server, cloud, endpoint, and network services.
• Diagnose and resolve issues across identity, devices, applications, and connectivity.
• Manage access controls, security policies, updates, and configuration changes.
• Maintain infrastructure documentation, network diagrams, and operating procedures.
• Support infrastructure upgrades and coordinate with vendors when needed.
• Communicate clearly with technical colleagues and nontechnical users.

Preferred experience

• PowerShell scripting and administrative automation a plus.
• Relevant certifications are a plus.

Required technical skills

• Windows Server 2022 and 2025: Installation, configuration, maintenance, patching, and troubleshooting.
• Active Directory: User and group administration, DNS, DHCP, and replication.
• Microsoft Entra ID: Identity administration, multifactor authentication, Conditional Access, and hybrid identity integration.
• Exchange Online: Mailbox administration, mail flow, permissions, email security, and troubleshooting.
• Microsoft Intune: Device enrollment, configuration profiles, compliance policies, application deployment, and endpoint management.
• Wi-Fi: Wireless configuration, authentication, coverage, performance, and connectivity troubleshooting.
• Switching: VLANs, trunking, PoE, spanning tree, and network troubleshooting.
• Cisco Meraki: Dashboard administration, MX/MR device configuration, monitoring, and troubleshooting.
• Sophos: Administration and troubleshooting of the Sophos products used in our environment.
• Network Policy Server (NPS): RADIUS configuration, network access policies, and 802.1X authentication.
• Ubiquiti Wi-Fi: Design, configuration, troubleshooting, and maintaining our corporate Wi-Fi.

Required

• Minimum of 5 years' experience.
• Must have a valid passport and be able to travel internationally.
• Demonstrated hands-on experience supporting a global environment.