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3 results for It Network Systems Administrator in Pico Rivera, CA

Network Administrator

Chino, CA
onsite
Temporary / Contract
71.25 - 82.5 USD / Hourly
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. Responsibilities: • 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.
2026-04-24T00:00:00Z

IT Support Analyst

Irvine, CA
onsite
Temporary / Contract
30 - 32 USD / Hourly
*Email valerie.montoya@rht(.com) for consideration* Robert Half is seeking a skilled and customer-focused IT Support Analyst to provide Tier 21/2 technical support in a dynamic, environment. This role is responsible for resolving escalated service desk issues, supporting end users across multiple platforms, and maintaining secure and efficient IT operations.. This role is 100% onsite. Top Skills:<ul><li>2-3 Years of experience</li><li>M365, SaaS, AD</li><li>Windows/Mac OS Exp. (Blended Environment)</li><li>Troubleshooting printers issues, wi-fi, basic network connectivity</li><li>L1/L2 Ticketing issues</li></ul>
2026-04-24T00:00:00Z

Information System Security Officer (ISSO)

Costa Mesa, CA
onsite
Temporary / Contract
50 - 70 USD / Hourly
We are seeking a cleared Information System Security Officer (ISSO) to support classified systems operating within the DoD Risk Management Framework (RMF) and JSIG environments. This role is highly documentation‑focused and centered on ATO support, continuous monitoring, audit readiness, and compliance across multiple classified networks. The ISSO will primarily support the ISSM and may assume ownership of smaller ATO efforts based on workload and system scope. This role will be a 3–6-month contract to hire opportunity! Key Responsibilities<ul><li>Serve as the ISSO for multiple classified systems, supporting RMF lifecycle activities under ISSM direction</li><li>Create, update, and submit security authorization artifacts for:</li><li>New hardware and software extensions</li><li>RMF updates and control changes</li><li>Support and maintain ATO packages, including initial authorizations, renewals, and extensions</li><li>Monitor and assess 3–5 classified networks, averaging ~1 hour per network for compliance and security reviews</li><li>Execute and document continuous monitoring activities using approved security tools</li><li>Participate in and support routine audits, inspections, and DoD compliance submissions</li><li>Partner with IT and engineering teams to ensure controls, scans, and audit activities are executed correctly</li><li>Conduct vulnerability scanning on a recurring schedule (not a primary time driver)</li><li>Support systems currently partially complete within the NIST RMF lifecycle</li><li>Participate in regular stakeholder syncs with ISSM, IT, security teams, and government representatives</li><li>Operate within a classified, air-gapped environment supporting a mixed operating system infrastructure</li></ul>
2026-04-27T00:00:00Z