Job Information
Robert Half Systems Administrator in San Antonio, Texas
Description
Robert Half is seeking a skilled System Administrator to support a client in San Antonio, Texas, responsible for managing mission‑critical systems, ensuring infrastructure security, and maintaining compliance across a diverse IT environment. The ideal candidate will bring strong expertise in server administration, virtualization, networking, automation, and enterprise hardware/software support.
Higher‑Level Responsibilities
The System Administrator will be responsible for advanced infrastructure operations, environment stability, and enterprise‑level configuration management. Key responsibilities include:
Developing and deploying Group Policy Objects (GPOs) and scripts to remediate complex or widespread end‑user device (EUD) issues related to vulnerabilities, security requirements, or compliance mandates.
Maintaining server and networking equipment, performing regular maintenance, addressing vulnerabilities, and ensuring compliance with Department of Defense (DoD) and DoW standards.
Administering VMware vCenter and ESXi hosts, including license updates, certificate management, patching, troubleshooting, and resource allocation across the virtual environment.
Managing internal and external security certificates, ensuring proper tracking, renewals, and alignment with organizational security policies.
Updating and managing critical server functions as the environment evolves—for example:
Updating WSUS for new Windows OS versions
Updating WDS for new hardware deployments
Applying updates to RHEL and other Linux servers
Supporting additional server roles as needed
Troubleshooting and maintaining backup servers and Oracle-based devices, resolving issues to ensure system continuity and data integrity.
IT Gear Support Responsibilities
(General support and configuration; vendor support/maintenance contracts are maintained separately)
This role includes support for a broad range of IT equipment and technologies:
Palo Alto firewalls
Cisco switches and routers
Phone systems (general issues)
Wireless infrastructure
Multi‑Function Devices (MFDs)
VMware platforms
Requirements Active Directory, Microsoft Windows Server, MS Windows 10, Dell Technologies, Citrix Technologies 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.
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