Network Administrator Job at Robert Half (Chino)

Network Administrator

Robert Half

Location:
United States , Chino

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

We are looking for a Network Administrator to support and maintain critical network infrastructure for a utilities and infrastructure environment in Chino, California. This Long-term Contract position focuses on ensuring secure, reliable connectivity across LAN and Cisco-based network environments while supporting day-to-day administration and troubleshooting. The ideal candidate will bring strong hands-on experience with firewall technologies, Cisco routers, Active Directory, and core networking operations in a fast-paced technical setting.

Job Responsibility:

Administer and support Cisco-based network infrastructure to maintain stable and secure connectivity across the organization
Configure, monitor, and troubleshoot firewall platforms to protect network assets and enforce security policies
Manage Cisco routers and related network components, resolving performance issues and maintaining optimal uptime
Oversee local area network operations, including connectivity, performance monitoring, and issue resolution for end users and systems
Support Active Directory-related network access and authentication needs in coordination with broader IT operations
Investigate network incidents, identify root causes, and implement corrective actions to reduce recurring disruptions
Maintain network documentation, diagrams, and configuration records to support operational consistency and compliance
Collaborate with internal teams on infrastructure updates, enhancements, and any network-related transition activities as needed

Requirements:

Hands-on experience administering enterprise network environments with a focus on Cisco networking technologies
Strong working knowledge of firewall technologies, including configuration, monitoring, and troubleshooting
Proven ability to support and maintain Cisco routers in a production environment
Experience working with Active Directory in relation to network access, authentication, or user support
Solid understanding of LAN administration, network protocols, and connectivity troubleshooting
Ability to diagnose technical issues methodically and communicate resolutions clearly to stakeholders
Experience maintaining accurate technical documentation for network configurations and support activities

What we offer:

medical
vision
dental
life and disability insurance
company 401(k) plan

Additional Information:

Job Posted:
May 04, 2026

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