IT Systems & Network Administrator

Christie; Belle Isle (FL); On-site; USD 70,000 - 100,000; 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. You will own day-to-day operations, security, and infrastructure improvements while troubleshooting across multiple technologies.

Responsibilities include maintaining secure server, cloud, and network services, diagnosing issues across identity and connectivity, and coordinating with vendors for upgrades.

Qualifications

• Minimum of 5 years' hands-on IT infrastructure experience.
• Must have a valid passport and be able to travel internationally.
• Demonstrated hands-on experience supporting a global environment.
• Preferred certifications and PowerShell automation capabilities.

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

Identity management

Tools

Windows Server

Active Directory

Entra ID

Exchange Online

Intune

Wi-Fi

Switching

Cisco Meraki

Sophos

NPS

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.