IT Jobs in Fullerton, CA

Serves as the liaison between client stakeholders and IT development teams, gathering and documenting requirements, coordinating implementation, tracking project progress, and maintaining project documentation. Supports user acceptance testing, issue tracking, system maintenance requests, enhancement tracking, stakeholder communications, and executive updates. Requires strong analytical, documentation, communication, and coordination skills, along with English and Korean fluency.

Supports enterprise data catalog development by profiling datasets, documenting definitions, and labeling data. Engineers and tests features improving AI and machine-learning model accuracy across business functions, and designs prompts for AI agents while evaluating response quality and failure cases.

Administers and monitors complex multi-site network infrastructure, including SD-WAN, routing, switching, firewalls, wireless, load balancers, VPNs, and cloud connectivity. Resolves escalated network tickets, performs maintenance, patches systems, remediates vulnerabilities, applies security standards, supports network architecture, and participates in technology projects. The role also provides rotating after-hours support and requires hybrid work, driving, and strong documentation and communication skills.

Provides on-site IT support and maintains desktop, mobile, phone, printer, network, point-of-sale, Microsoft 365, and audiovisual systems. Configures and deploys hardware, administers Azure and Active Directory accounts, troubleshoots connectivity and user issues, supports event technology, and resolves help desk tickets. Requires flexible availability for events, including nights, weekends, and holidays, along with the ability to lift up to 50 pounds.

Provide end-to-end systems administration for on-prem and cloud environments: install/configure Windows/Linux servers, firewalls, networks, virtualization, storage, backups, and Java web applications; support customers via tickets and coordinate maintenance and upgrades.

The IT Project Manager will lead IT projects, manage budgets and schedules, ensure project scope meets business needs, and communicate with stakeholders.

Senior IT Systems Engineer responsible for designing, configuring, and troubleshooting hybrid on‑premises and cloud infrastructure. Lead infrastructure projects, manage VMware vSphere/ESXi, SANs, backups/DR, Office 365 and related services, implement Azure components, automate tasks, document procedures, remediate audit findings, and mentor/coordinate technical work across teams.