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.

Responsibilities:

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.