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5 results for Systems Administrator in Murrieta, CA

IT System Administrator

Rowland Heights, CA
onsite
Temporary / Contract
45 - 50 USD / Hourly
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. <ul><li>Administer, maintain, and troubleshoot Windows Server environments</li><li>Manage Active Directory, Group Policy, user accounts, permissions, and access controls</li><li>Support Microsoft 365 administration, including Exchange Online, Teams, SharePoint, OneDrive, and user management</li><li>Monitor system performance, availability, and security of servers and infrastructure</li><li>Perform server maintenance, patching, upgrades, and troubleshooting</li><li>Support virtualization environments including VMware and/or Hyper-V</li><li>Configure, maintain, and troubleshoot network infrastructure including switches, routers, wireless access points, VLANs, and VPNs</li><li>Support firewall administration, rule reviews, security policies, and connectivity troubleshooting</li><li>Manage backup solutions, disaster recovery processes, and system restoration testing</li><li>Assist with cloud infrastructure support across platforms such as Azure and AWS</li><li>Troubleshoot hardware, software, and infrastructure issues escalated from support teams</li><li>Implement and maintain endpoint security tools, MFA, antivirus, and security best practices</li><li>Create and maintain technical documentation, system diagrams, and standard operating procedures</li><li>Work with vendors and third-party providers to resolve technical issues</li><li>Participate in infrastructure projects, upgrades, migrations, and deployments</li></ul>
2026-07-11T00:00:00Z

IT Systems Administrator

San Marcos, CA
onsite
Temporary / Contract
31.6635 - 36.663 USD / Hourly
We are looking for an IT Systems Administrator to provide onsite technical support for a mission-driven nonprofit serving children, youth, and families in California. This long-term contract position is ideal for a hands-on, detail-focused individual who can balance daily user support with infrastructure administration in a Microsoft-centered environment. The role will act as a key technology resource for staff, helping maintain reliable systems that support both office-based and distributed employees. Responsibilities: • Deliver onsite and remote technical assistance for employees, resolving issues involving computers, software applications, printers, connectivity, and security tools. • Administer core Microsoft technologies, including Windows-based systems, Outlook, Teams, and related business productivity platforms. • Coordinate employee onboarding and offboarding by preparing laptops, creating and removing accounts, assigning access, and ensuring a smooth technical setup. • Support the organization’s infrastructure by maintaining servers, network devices, and Cisco-related equipment across the environment. • Manage user access and device support for remote staff, helping maintain secure and dependable connectivity for a distributed workforce. • Contribute to IT planning efforts by identifying system needs, recommending improvements, and participating in practical technology decisions. • Maintain accurate technical documentation and help ensure information is transferred correctly into required healthcare-related systems when necessary. • Provide support for business applications such as QuickBooks, Paycom, and Salesforce as needed, coordinating troubleshooting and user guidance. • Monitor and organize technology assets and equipment to help keep daily operations running efficiently across the organization.
2026-07-17T00:00:00Z

IT Systems Manager

Irvine, CA
onsite
Temporary / Contract
59.375 - 68.75 USD / Hourly
We are looking for an IT Systems Manager to oversee and strengthen a modern enterprise technology environment in Irvine, California. This Long-term Contract position will focus on cloud services, infrastructure reliability, endpoint management, and security operations while supporting business-critical systems across the organization. The ideal candidate brings deep technical expertise across Microsoft 365, Azure, AWS, networking, and compliance-minded IT practices in a regulated setting. Responsibilities: • Lead administration and optimization of Microsoft 365 services, including user access, collaboration tools, and platform governance. • Manage identity and access controls across Azure AD / Entra ID and Active Directory to support secure, reliable authentication. • Oversee SharePoint Online, Intune, and endpoint management solutions to improve device performance, compliance, and user support. • Maintain and enhance network infrastructure, firewalls, and Meraki environments to ensure connectivity, stability, and protection. • Support cloud operations across Azure, AWS, and other SaaS platforms, including configuration, monitoring, and service improvement. • Direct backup, recovery, and business continuity processes to protect critical data and reduce operational risk. • Implement and monitor endpoint security and broader information security measures aligned with organizational standards. • Contribute to migration-related initiatives and system changes by coordinating technical execution, documentation, and risk controls. • Prepare and maintain technical records, validation materials, and audit-ready documentation in support of regulated IT operations.
2026-07-20T00:00:00Z

IT Systems Generalist

San Marcos, CA
onsite
Temporary / Contract
38 - 40 USD / Hourly
Robert Half is seeking an IT Systems Administrator; this is an opportunity for a well-rounded IT Systems Administrator who enjoys balancing infrastructure administration with end-user support. You'll serve as the primary onsite IT resource, supporting Microsoft technologies, network infrastructure, and day-to-day technical operations while partnering closely with leadership on ongoing technology initiatives. · Administer and support Microsoft technologies including Microsoft 365, Teams, Outlook, and Windows environments. · Manage employee onboarding and offboarding, including laptop imaging, equipment deployment, account provisioning, and user access. · Maintain Active Directory, user accounts, permissions, and remote access. · Support and troubleshoot network infrastructure including switches, wireless connectivity, and Cisco networking equipment. · Coordinate endpoint management, remote devices, and ongoing technical support for a distributed workforce. · Maintain IT documentation, asset inventory, and technical procedures. · Assist with infrastructure planning, technology improvements, and IT best practices. · Coordinate with technology vendors and third-party service providers as needed. · Help ensure secure, reliable, and efficient IT operations across the organization.
2026-07-10T00:00:00Z

Security Network Engineer

San Diego, CA
remote
Temporary / Contract
57 - 66 USD / Hourly
We are looking for a Security Network Engineer to support a Contract engagement based in San Diego, California. This role will guide the design and optimization of secure connectivity across a Cisco Viptela SD-WAN environment integrated with Zscaler, with a strong focus on resiliency, user experience, and identity-aware traffic handling. The ideal consultant will bring advanced technical judgment, help shape architecture decisions, and work closely with internal stakeholders to strengthen network security performance during failover and routing events. Responsibilities: • Assess the current Zscaler and Cisco Viptela landscape to identify gaps, risks, and opportunities for improved secure connectivity. • Compare agent-based and tunnel-based deployment approaches, then recommend the most effective model for business, security, and operational needs. • Develop and test failover designs across multiple network circuits to reduce user disruption during provider or path changes. • Refine traffic steering and policy behavior to improve session stability and application access within the SD-WAN environment. • Preserve key identity-related data used for security enforcement and visibility, including user and device context across network flows. • Partner with internal technical teams and external service providers to implement configuration improvements and validate outcomes. • Troubleshoot complex issues involving cloud security controls, SD-WAN routing behavior, and end-user connectivity. • Produce clear technical documentation covering findings, recommended changes, and the target-state architecture. • Advise on routing, segmentation, and secure access strategies involving technologies such as BGP, Cisco routing platforms, Cisco ASA, Palo Alto Firewall, and related network security tools.
2026-07-20T00:00:00Z