IT Systems Administrator

Addison HVAC; Orlando (FL); On-site; USD 70,000 - 110,000; Full time

Job summary

Addison HVAC is seeking a Systems Administrator to install, configure, maintain, and support our on-premises and cloud IT infrastructure in Orlando. You will manage ~350 users, own day-to-day operations, and drive automation, security, and improvements with limited supervision.

The role requires strong problem-solving, excellent communication, and the ability to work independently while coordinating with IT leadership for escalations and strategic initiatives.

Qualifications

• 4–6 years hands-on system administration experience.
• Experience with Active Directory, Group Policy, and permissions.
• Strong understanding of operating systems and PowerShell usage.
• Experience administering Microsoft 365 Copilot and Azure.
• Familiarity with network infrastructure, security, and backups.

Responsibilities

• Install and configure hardware, software, and network infrastructure.
• Maintain servers, PCs, and software to ensure reliability.
• Troubleshoot hardware, software, and networking issues.
• Secure data and IT infrastructure from threats.
• Document system operations and backups.
• Automate repetitive tasks and optimize workflows.
• Manage Office 365 Copilot/Azure setup and configuration.
• Participate in long-term IT design and improvements.

Skills

Operating systems proficiency

PowerShell

Microsoft 365 Copilot/Azure

Active Directory/Group Policy

Networking basics (WAN/LAN, firewalls)

Backup and recovery

Security best practices

Written and verbal communication

Planning/organization

Problem solving under pressure

Endpoint management (Intune, RMM)

SQL basics

Tools

Intune/RMM

SQL administration

Job description

The Systems Administrator is responsible for installing, configuring, maintaining, and supporting the organization’s on‑premises and cloud‑based IT infrastructure. This role ensures system reliability, performance, security, and availability across servers, endpoints, networks, and cloud services. This role supports approximately 350 users and operates with a high degree of independence, owning day‑to‑day system operations while proactively identifying and implementing improvements. The ideal candidate is a technically strong problem‑solver with solid communication skills and a passion for automation, security, and continuous improvement. This role works independently day to day, with escalation and strategic support available from IT leadership.

Key Responsibilities:

• Install and configure: Setup and install hardware, software, and network infrastructure
• Maintain: Keep servers, PCs, and software running smoothly
• Troubleshoot: Diagnose and fix issues in regards to hardware, software and networking
• Secure: Protect data and IT infrastructure from threats
• Document: Keep records of system operations
• Back up: Plan and implement backups for data loss and recovery
• Automate: Use tools to automate repetitive tasks
• Install Software: Install security software, regular organizational software and specialty software upon request
• Configure firewalls and switches
• User and access management: add, remove, update users or passwords
• Maintenance: PC and server updates, along with 3rd party software updates
• Cloud: Office 365(copilot) and Azure setup and configuration
• Continuous improvements: Lead or participate in the long-term design and improvements to IT infrastructure, standards, and processes

Required Skills & Qualifications:

• Technical Skills
• Strong understanding of operating systems and ability to use PowerShell
• Advanced, hands‑on experience administering Microsoft 365(Copilot) and Azure
• Advanced experience of Active Directory, Group Policy, and permissions
• Solid understanding of Networking, WAN, LAN, firewalls, switches
• Understanding of backup, recovery, and security practices
• Professional Skills
• Written and verbal communication skills
• Planning and organization skills
• Advanced Problem-solving skills
• The ability to work under pressure using calm and logical thinking
• Operate with minimal day‑to‑day oversight
• Expected to prioritize work and manage time independently
• Strong judgment and ability to balance stability, security, and business needs independently
• Nice to Have Skills
• PowerShell automation beyond basic scripting
• Experience with endpoint management tools (Intune, RMM, etc.)
• Basic SQL administration or troubleshooting

Experience & Education:

• 4 – 6 years of hands‑on experience in system administration
• Active Directory
• LAN/WAN networking
• Relevant certifications are a plus:
• CompTIA Network+ / Server+
• Microsoft certifications (Azure, M365, Windows Server)