Systems Administrator

Air Treatment Corporation; Brea (CA); On-site; USD 85,000 - 120,000; Full time

Job summary

Air Treatment Corporation in Brea, CA seeks a Systems Administrator to manage and maintain IT infrastructure, ensuring performance, security, and reliability across systems, networks, and services.

You will install, configure, monitor, and secure servers, apply patches, manage AD/GP, and support end-users while driving system improvements and documentation. This on-site role offers growth within a collaborative HVAC solutions team.

Qualifications

• Proficiency in managing and configuring Windows server environments.
• Experience with virtualization technologies (Windows Hyper‑V).
• Strong understanding of network protocols, firewalls, and security principles.
• Familiarity with cloud platforms like AWS or Azure.
• Experience with system monitoring and performance tuning tools.
• Proficient in scripting languages such as Bash, PowerShell, or Python.
• Strong problem-solving skills and attention to detail.
• Excellent communication and documentation skills.
• Ability to manage and prioritize multiple tasks and projects.
• Knowledge of backup and recovery solutions.
• Experience with Active Directory and Group Policy management.
• Availability for on‑call support and emergency response as needed.

Responsibilities

• Install, configure, and maintain operating systems, software, and hardware.
• Monitor system performance and ensure availability and reliability.
• Administer and maintain system security and backup protocols.
• Troubleshoot and resolve hardware, software, and network issues.
• Perform regular system upgrades and apply patches to ensure optimal performance.
• Manage user accounts, permissions, and access rights.
• Implement and manage system and network configurations.
• Collaborate with IT team members to enhance security and efficiency.
• Maintain comprehensive documentation of systems and processes.
• Ensure compliance with company policies and industry regulations.
• Provide technical support and guidance to end-users.
• Plan and execute system capacity and resource planning.
• Automate routine tasks using scripts and configuration management tools.
• Participate in disaster recovery planning and testing.
• Evaluate and recommend new technologies to improve infrastructure efficiency.

Skills

Windows Server

Hyper-V

Networking & Security

Cloud: AWS/Azure

Monitoring Tools

Scripting: Bash/PowerShell/Python

Problem Solving

Documentation

Multi-tasking

Backup & Recovery

Active Directory & GPO

On-call Support

Education

Bachelor's degree in Computer Science / IT or related field

Relevant certifications (CompTIA A+/Network+/Security+ or MCSE) preferred

Job description

Systems Administrator

Air Treatment Corporation Brea, California, United States

About this position

Description:

Air Treatment Corporation is a dynamic, collaborative work environment. We understand the expectations of high-quality customer service, therefore we actively search and promote a cohesive team that is formulated to exceed expectations. We are devoted to the growth of our employees and look to provide opportunities for advancement from within.

Hiring Manager: Matt Lowe

Location: Brea, CA

Estimated Pay Range: $85,000.00 - $120,000.00

Job Summary:

The Systems Administrator is responsible for managing and maintaining our organization's IT infrastructure, ensuring optimal performance, security, and reliability.

Duties/Responsibilities:

• Install, configure, and maintain operating systems, software, and hardware.
• Monitor system performance and ensure availability and reliability.
• Administer and maintain system security and backup protocols.
• Troubleshoot and resolve hardware, software, and network issues.
• Perform regular system upgrades and apply patches to ensure optimal performance.
• Manage user accounts, permissions, and access rights.
• Implement and manage system and network configurations.
• Collaborate with IT team members to enhance security and efficiency.
• Maintain comprehensive documentation of systems and processes.
• Ensure compliance with company policies and industry regulations.
• Provide technical support and guidance to end-users.
• Plan and execute system capacity and resource planning.
• Automate routine tasks using scripts and configuration management tools.
• Participate in disaster recovery planning and testing.
• Evaluate and recommend new technologies to improve infrastructure efficiency.

Requirements:

Required Skills/Abilities:

• Proficiency in managing and configuring Windows server environments
• Experience with virtualization technologies (Windows Hyper‑V)
• Strong understanding of network protocols, firewalls, and security principles
• Familiarity with cloud platforms like AWS or Azure
• Experience with system monitoring and performance tuning tools
• Proficient in scripting languages such as Bash, PowerShell, or Python
• Strong problem-solving skills and attention to detail
• Excellent communication and documentation skills
• Ability to manage and prioritize multiple tasks and projects
• Knowledge of backup and recovery solutions
• Experience with Active Directory and Group Policy management
• Availability for on‑call support and emergency response as needed

Education and Experience:

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience
• Proven experience as a Systems Administrator or in a similar role
• Relevant certifications such as CompTIA A+, Network+, Security+, or Microsoft Certified Solutions Expert (MCSE) preferred.

Physical Requirements:

• Prolonged periods sitting at a desk and working on a computer.
• Frequent use of hands and fingers to operate a computer keyboard, mouse, and other technical equipment.
• Ability to occasionally stand, walk, bend, kneel, or crouch to install or troubleshoot equipment.
• Ability to lift and move equipment up to 25–50 pounds (computers, monitors, printers, network equipment).
• Visual ability to read screens, technical documents, and equipment labels.
• May require travel between office locations or facilities.
• On‑site position, no relocation provided.

At Air Treatment Corporation, we are committed to growth, innovation, and excellence. As leading experts in HVAC & R solutions, we recognize that the success of our team drives the success of our company. This is echoed in our commitment to a workplace built on fairness, professionalism, and opportunity, ensuring that every team member is valued. Join our team and contribute your unique skills and perspectives to help us continue delivering industry-leading solutions.