Systems Administrator Jobs in Brea, CA

Elevate your skills in a dynamic IT setting by overseeing hands-on systems administration for Microsoft 365, Google Workspace, and various security tools, while ensuring reliable network and infrastru...

Oversee the administration of cloud-based IT systems, driving service quality and efficiency while managing escalated support and strategic IT projects for a dynamic organization poised for growth...

Manage mission-critical IT systems in a secure environment. Leverage expertise in cloud technologies and security compliance while ensuring operational readiness for defense contracting projects...

Take ownership of ServiceNow system administration, ensuring security, compliance, and reliability across federal environments while collaborating with cross-functional teams to optimize platform perf...

Elevate your career as a key contributor to our Infrastructure team, specializing in managing custom-built Linux servers and enhancing our virtualized environment while collaborating with a seasoned t...

Transform your career as a systems administrator, overseeing M365 services, data architecture, and robust security operations while collaborating with cross-functional teams to deliver efficient IT so...

Develop and support secure Windows networks and assist customers in resolving IT issues. Collaborate with teams to maintain systems and perform upgrades in a fast-paced environment serving sensitive o...

Champion seamless IT operations by providing critical support for network servers, applications, and security compliance. Ensure efficient system functionality and address technical issues to enable a...

Join a team that's building a robust in-house IT function, overseeing all aspects of infrastructure, security, and service delivery. Lead endpoints management, enhance compliance, and mentor IT staff...

Transform the internal IT landscape by building and managing systems from scratch, overseeing infrastructure, endpoint management, and security while leading and developing the IT Support Specialist i...

Join a dynamic team to optimize system performance, troubleshoot technical issues, and develop administration procedures while ensuring security and compliance in a regulated environment. Make an impa...

Transform business-critical systems by optimizing enterprise technology and cloud strategies. Champion security and reliability within a fast-paced environment, ensuring high availability and performa...

Engineer and optimize enterprise technology environments, focusing on Microsoft 365 and cloud-first strategies. Ensure reliability, security, and service excellence in systems administration while fos...

Join a dynamic team to oversee and optimize IT operations at our site. You will ensure seamless functionality of technology infrastructure, provide user support, and manage local IT resources while co...

Transform mission-critical Navy training systems by optimizing and securing complex DoD environments. Engage in hands-on system administration, ensuring compliance and enhancing cybersecurity operatio...

Join our team as a Network & IT Infrastructure Administrator to manage, maintain, and enhance network and IT systems, ensuring seamless operations for about 200 users while coordinating with internal...

Tackle advanced Azure cloud and network infrastructure challenges, leading secure migration efforts and managing complex systems. Enhance operational efficiency through innovative solutions and collab...

Lead the charge in elevating cloud infrastructure through advanced Linux systems administration, mentoring, and project management in a high-growth tech environment...

Grow your expertise by tackling complex infrastructure solutions, optimizing performance, and driving automation initiatives within a hybrid-cloud environment while leading cross-functional teams and...

Transform technology operations by managing enterprise systems and supporting innovative training programs for child welfare professionals. Collaborate with university and county partners to enhance l...

Shape the future of space operations by leading technical support for classified programs, ensuring mission protection and infrastructure planning while contributing to the Department of Defense's cri...

Contribute to the effective management of the ServiceNow platform, ensuring optimal performance and user satisfaction through system upgrades, troubleshooting, reporting, and collaboration with stakeh...

Empower corporate IT operations by leading a Microsoft 365 tenant migration, managing identity access via Okta and Entra ID, and overseeing Windows endpoints. Drive effective service desk operations w...

Empower scalable contract lifecycle management by owning and optimizing the CLM platform. Collaborate across teams to streamline processes and ensure reliable system performance, while enhancing data...

Join a team that's dedicated to optimizing network operations, ensuring seamless infrastructure support, and delivering innovative IT solutions across multiple campus project sites. Your expertise wil...