IT System Administrator

Robert Half • City Of Industry, CA • 1h ago

Description

Robert Half is seeking an experienced Systems Administrator to support, maintain, and improve enterprise IT infrastructure. This role will be responsible for managing servers, networks, cloud services, security tools, and end-user environments while ensuring system reliability, performance, and security. The ideal candidate will have hands-on experience with Windows Server environments, Microsoft 365, virtualization, networking, firewalls, backups, and infrastructure troubleshooting. This position requires a proactive problem solver who can manage daily operations while supporting ongoing technology initiatives.

Administer, maintain, and troubleshoot Windows Server environments

Manage Active Directory, Group Policy, user accounts, permissions, and access controls

Support Microsoft 365 administration, including Exchange Online, Teams, SharePoint, OneDrive, and user management

Monitor system performance, availability, and security of servers and infrastructure

Perform server maintenance, patching, upgrades, and troubleshooting

Support virtualization environments including VMware and/or Hyper-V

Configure, maintain, and troubleshoot network infrastructure including switches, routers, wireless access points, VLANs, and VPNs

Support firewall administration, rule reviews, security policies, and connectivity troubleshooting

Manage backup solutions, disaster recovery processes, and system restoration testing

Assist with cloud infrastructure support across platforms such as Azure and AWS

Troubleshoot hardware, software, and infrastructure issues escalated from support teams

Implement and maintain endpoint security tools, MFA, antivirus, and security best practices

Create and maintain technical documentation, system diagrams, and standard operating procedures

Work with vendors and third-party providers to resolve technical issues

Participate in infrastructure projects, upgrades, migrations, and deployments

Requirements

4+ years of experience as a Systems Administrator or similar infrastructure role

Strong experience supporting Windows Server environments

Experience with Active Directory, DNS, DHCP, and Group Policy

Hands-on Microsoft 365 administration experience

Strong networking knowledge including TCP/IP, LAN/WAN, VLANs, VPNs, and firewalls

Experience supporting virtualization technologies (VMware, Hyper-V, or similar)

Experience with backups, disaster recovery, and system monitoring tools

Strong troubleshooting and analytical skills

Ability to manage multiple priorities and work independently

Technology Doesn't Change the World, People Do.®

Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app (https://www.roberthalf.com/us/en/mobile-app) and get 1-tap apply, notifications of AI-matched jobs, and much more.

All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

© 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use (https://www.roberthalf.com/us/en/terms) and Privacy Notice (https://www.roberthalf.com/us/en/privacy) .

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