Systems Administrator

Robert Half is looking for a Systems Administrator to support and maintain a complex enterprise technology environment in California. This Systems Administrator opportunity is ideal for a hands-on technical professional with strong experience in Windows Server, VMware, Active Directory, networking, and infrastructure support. The Systems Administrator will be responsible for maintaining critical systems, troubleshooting escalated technical issues, supporting infrastructure projects, and improving the reliability, performance, and security of enterprise technology. This position requires someone who can work independently, collaborate with senior technical staff, and provide exceptional support to end users. This Systems Administrator Role is an onsite position out of Martinez, Ca and has the potential to go fulltime., * Administer, configure, and maintain enterprise infrastructure, including Windows servers, VMware virtual environments, Active Directory, networks, VPNs, firewalls, and storage systems.

• Support the installation, configuration, testing, maintenance, and troubleshooting of physical and virtual servers, network devices, and enterprise applications.
• Manage Windows Server environments, including Active Directory, Group Policy, DNS, DHCP, file services, and user account administration.
• Support VMware virtualization technologies, including vCenter, vSphere, vMotion, and virtual machine management.
• Troubleshoot complex hardware, software, network connectivity, application access, and system performance issues.
• Perform routine infrastructure maintenance, including system backups, patch management, operating system upgrades, security updates, and performance optimization.
• Monitor infrastructure health, network security, and system availability while identifying and resolving potential issues.
• Administer Microsoft 365, Exchange, and related cloud-based services to support enterprise communications and collaboration.
• Support network infrastructure, including LAN/WAN environments, switches, routers, wireless connectivity, firewalls, and VoIP systems.
• Assist with storage administration, disaster recovery processes, data protection, and system restoration activities.
• Utilize PowerShell and other scripting tools to automate administrative tasks and improve operational efficiency.
• Serve as a second-level escalation resource for technical support issues involving servers, networks, applications, and end-user systems.
• Collaborate with internal teams, technical leadership, and external vendors on infrastructure improvements and technology implementations.
• Develop and maintain technical documentation, system configurations, troubleshooting procedures, and operational guidelines.
• Identify opportunities to improve infrastructure reliability, security, automation, and overall IT service delivery.

• 5+ years of experience in systems administration, infrastructure support, or systems engineering within a complex enterprise environment.
• Strong hands-on experience administering Microsoft Windows Server, Active Directory, Group Policy, DNS, and DHCP.
• Experience supporting Windows 10/11 desktop environments and Microsoft 365 administration.
• Proficiency with VMware virtualization technologies, including vSphere, vCenter, and virtual machine administration.
• Solid understanding of networking concepts, including TCP/IP, VLANs, LAN/WAN, VPNs, routing, switching, and network troubleshooting.
• Experience with server maintenance, system backups, patch management, performance monitoring, and disaster recovery processes.
• Working knowledge of Microsoft Exchange, Azure-based services, and enterprise identity management.
• Experience troubleshooting escalated infrastructure issues across servers, networks, storage, and end-user computing environments.
• Familiarity with PowerShell scripting and automation tools.
• Knowledge of network security practices, firewall management, and system access controls.
• Experience with SAN storage, Cisco networking, Linux, SQL Server, or IIS is a plus.
• Strong analytical, troubleshooting, documentation, and communication skills.
• Ability to manage multiple technical priorities, work independently, and collaborate effectively with internal teams and external vendors.
• Bachelor’s or Associate’s degree in Computer Science, Information Systems, or a related field preferred; equivalent professional experience will be considered.
• Microsoft, VMware, Cisco CCNA, or related technical certifications are a plus., 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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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.