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498 systems administrator jobs at 323 companies in Ontario, CA

3w
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Systems Administrator
Glendale, California, United States
$105k-$145k/yr OnsiteFull Time
Brio Water Technology
Brio Water Technology: A market-leading water products brand offering home hydration solutions that combine technology and design to improve everyday hydration.
4+ YOE4+ years systems administration experience, Microsoft 365/Google Workspace/Entra ID/Active Directory administration, endpoint and security tooling, networking fundamentals, PowerShell, Azure Site Recovery or comparable recovery experience.
Microsoft 365, Google Workspace, Microsoft Entra ID, Microsoft Active Directory, Microsoft Exchange Online, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, PowerShell, Azure Site Recovery, Azure, AWS, CrowdStrike, Datadog, NinjaOne, PDQ, EDR
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2d
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Systems Administrator
Brea, California, United States
$85k-$120k/yr OnsiteFull Time
Air Treatment Corporation
Air Treatment Corporation: Sells and services commercial HVAC and refrigeration systems.
Bachelor's degree or equivalent experience, systems administration experience, Windows Server, Hyper-V, networking, security, cloud platforms, scripting, Active Directory, backups, and on-call support.
Windows Server, Windows Hyper-V, AWS, Azure, Bash, PowerShell, Python, Active Directory, Group Policy, Microsoft Certified Solutions Expert (MCSE)
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1mo
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Systems Administrator
Los Angeles, California, United States
$85k-$120k/yr OnsiteFull Time
Antares
Antares: Designing and manufacturing microreactors for defense and space missions.
2+ YOE2+ years IT support/systems administration experience; Microsoft 365/Entra ID/Intune knowledge; endpoint, networking, and cloud (Azure/AWS) familiarity; PowerShell and troubleshooting skills; compliance/audit documentation experience.
Microsoft 365, Microsoft Entra ID, Microsoft Intune, Microsoft Defender, Microsoft Exchange, Microsoft Teams, Microsoft SharePoint, Windows, macOS, Linux, PowerShell, Microsoft Azure, AWS, GCC High, Ubiquiti, UniFi, Zoom, PSA, RMM, VPN, LAN, WAN, WiFi, TCP/IP, DNS, DHCP, VLAN, NAC
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2mo
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Systems Administrator
Victorville, California, United States
$79k-$100k/yr RemoteFull Time
Dynamic Solutions Technology
Dynamic Solutions Technology: Provides IT, engineering, and program management services to government agencies.
5+ YOE5+ years systems administration experience supporting Microsoft Windows environments; account management, troubleshooting, hardware/software installation, patching, backups; BS in IT or equivalent experience; certification like CompTIA Security+/Network+/A+, MCP, or MCSA; travel required.
Microsoft Windows, Microsoft Office
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Senior Systems Administrator
Anaheim, California, United States
$85k-$105k/yr OnsiteFull Time
Quantum Electronic Payments
Quantum Electronic Payments: Provides payment processing solutions and merchant services for businesses.
5+ YOE5+ years systems administration experience with Microsoft 365, Active Directory, Windows, networking, endpoint security, backups, and documentation; strong troubleshooting and communication skills.
Microsoft 365, Active Directory, Windows, DNS, DHCP, VPN, PowerShell, SIEM, EDR/MDR
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1w
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Senior Systems Administrator
El Segundo, California, United States
$65k-$85k/yr OnsiteFull Time
Tecolote Research
Tecolote Research: Provides defense acquisition consulting, analytics, and software solutions.
4+ YOE4+ years systems administration experience with AWS, Microsoft 365/Intune, VMware, Zscaler, Terraform; scripting (PowerShell/Python) and strong troubleshooting; bachelor’s preferred.
AWS, Microsoft 365, Intune, Terraform, Zscaler, VMware vSphere, vCenter, ESXi, Horizon View, Exchange Online, Active Directory, IIS, DNS, DHCP, BitLocker, PowerShell, Python, Defender, Unifi, PowerEdge, SAN
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2w
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Systems Administrator III
New York or Los Angeles
$96k-$154k/yr OnsiteFull Time
Kapitus
Kapitus: Providing flexible financing and capital solutions for small businesses.
5+ YOE5+ years systems administration with Azure, Microsoft 365, AD, virtualization, IaC and security experience; fintech/regulatory familiarity; scripting and automation skills; bachelor's or equivalent experience.
Microsoft Azure, Microsoft 365, Exchange Online, Teams, SharePoint, OneDrive, Microsoft Intune, JAMF, Terraform, Ansible, Puppet, PowerShell, Python, Bash, VMware vSphere, Citrix Virtual Desktops, Cisco Meraki, SIEM, EDR, ServiceNow, Jira Service Management, Salesforce
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6d
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Senior Systems Administrator
Beverly Hills or Los Angeles or Louisville or Tokyo or Danville or Shelbyville or Chitose
$160k/yr OnsiteFull Time
IJW Whiskey Company
IJW Whiskey Company: Produces, ages, and bottles premium Kentucky bourbon and rye.
10+ YOEBachelor's degree in computer science, information technology, or related field; 10+ years of systems administration experience; expertise in servers, networks, security, virtualization, storage, and disaster recovery.
VMware, Hyper-V
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6d
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Senior Systems Administrator
Beverly Hills or Louisville or Tokyo or Kentucky or Shelbyville or Chitose
OnsiteFull Time
IJW Whiskey Company
IJW Whiskey Company: Produces and matures premium Kentucky bourbon and rye whiskey.
10+ YOEBachelor's degree in computer science, information technology, or related field; 10+ years of systems administration experience; server, network, security, virtualization, storage, backup, and troubleshooting expertise.
VMware, Hyper-V, CompTIA Network+, MCSA, CCNA
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2mo
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Senior Systems Administrator
Costa Mesa, California, United States
$146k-$194k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
8+ YOE8+ years designing and implementing classified IT systems; experience with air-gapped systems, physical hardware, virtualization (VMware/Podman), Windows and Linux administration, DISA STIG hardening, NIST 800-53/RMF familiarity, automation, DoD 8570/8140 baseline certification, and active U.S. Top Secret clearance.
Lattice OS, Microsoft Windows, Microsoft Windows Server, Linux, VMware, Podman, Ansible, DISA STIGs, NIST 800-53, Risk Management Framework (RMF)
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4d
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Systems Administrator - Surveillance
Highland, California, United States
OnsiteFull Time
Yuhaaviatam of San Manuel Nation
Yuhaaviatam of San Manuel Nation: Operates a luxury resort and casino in Southern California.
2+ YOEBachelor's degree in computer science, information technology, or related field; 2+ years of relevant technical experience; systems administration expertise; valid driver's license; English proficiency; required fiber optic and Genetec certifications.
Microsoft Windows Server, VMware, vSphere, vCenter, SQL Server, Active Directory, SAN, NAS, DAS, Fiber Channel (FC), iSCSI, Palo Alto, Pure Storage, Dell Isilon, Cisco, ESXi, Extreme switching, SolarWinds, Dynatrace, Genetec, Microsoft Certified Systems Engineer (MCSE), Microsoft Certified Systems Administrator (MCSA), Cisco Certified Network Associate (CCNA), Extreme Networks, Extreme Networks Associate (XNA), Extreme Certified Specialist (ECS), Extreme Design Specialist (EDS)
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1mo
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Senior Systems Administrator
Long Beach, California, United States
$103k-$155k/yr OnsiteFull Time
Relativity Space
Relativity Space: Designing and manufacturing 3D-printed rockets and launch vehicles.
6+ YOE6+ years Linux and Windows systems administration experience; expertise in Linux, Active Directory, DNS, DHCP, enterprise backup solutions; scripting/automation and cloud (Azure/GCP) experience; strong troubleshooting and documentation skills.
Linux, Windows, Azure, GCP, Active Directory, DNS, DHCP, Veeam, Commvault, Rubrik, Ansible, Puppet, Terraform, Bash, Python, PowerShell
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3d
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Systems Administrator SME
Corona or Norco
$115k-$135k/yr OnsiteFull Time
Bowhead
Bowhead: Federal government contracting and professional services provider.
5+ YOERequires Secret clearance, IAT Level II certification, and extensive systems administration experience; qualifying paths include high school/GED plus 12+ years, bachelor's plus 8+ years, or master's plus 5+ years.
Windows, Linux, Unix, Microsoft Office Suite, firewalls, anti-virus, intrusion detection
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2mo
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IT Systems Administrator
Seal Beach, California, United States
$86k-$150k/yr OnsiteFull Time
AstroForge
AstroForge: Mines and refines valuable minerals from near-Earth asteroids.
3+ YOE3+ years in IT systems administration with cross-platform support (macOS, Windows, Linux); network administration; IAM; cloud and SaaS management; ITAR/CMMC awareness.
macOS, Windows, Linux, routing, switching, VPNs, firewalls, wireless, Active Directory, Azure AD, Okta, AWS, GCP, Azure, Google Workspace, Microsoft 365, Slack, Zoom, GitHub, Bash, PowerShell, Python, Jamf, Intune, NIST CSF, CIS Controls, CompTIA Security+, Network+
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1w
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Systems Administrator- Engineering & Infrastructure
Santa Fe Springs or Los Angeles
$90k-$120k/yr OnsiteFull Time
Votaw Precision Technologies
Votaw Precision Technologies: Manufacturing precision components and assemblies for aerospace and defense
3+ YOEBachelor's degree or equivalent experience; 3+ years writing SQL queries and stored procedures; reporting tools experience; systems administration expertise; U.S. person status and ability to obtain a security clearance.
FlexLM, Microsoft GCC High, Entra, Microsoft Intune, Mobile Device Management (MDM), CATIA, NX, Windchill, Teamcenter, AWS GovCloud, SQL, Tableau, Microsoft Power BI, SQL Server Reporting Services (SSRS), Epicor ERP, NIST 800-171, CMMC, ITAR
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1w
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Principal Systems Administrator
El Segundo, California, United States
$96k-$182k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: Provides advanced aerospace and defense systems and services.
5+ YOEUniversity degree or equivalent experience plus 5 years of relevant experience, or advanced degree plus 3 years. Requires U.S. citizenship, Secret clearance, Windows administration expertise, and DoD certification within 6 months.
Microsoft Windows, Microsoft Windows Server, DNS, DHCP, Active Directory, Microsoft WSUS, VMware, Red Hat Enterprise Linux, Linux, RAID, SCAP, STIGs
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1mo
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Systems Administrator (ERP)
Long Beach, California, United States
$90k-$110k/yr HybridFull Time
SCS Engineers
SCS Engineers: Provides environmental consulting and engineering services for waste management.
8+ YOE8+ years ERP experience with 4+ years administering ERP systems; bachelor’s in CS/IS/Business Analytics or related, strong T-SQL/SQL Server/SSRS skills, Power BI experience, excellent communication and troubleshooting.
Deltek Vantagepoint, Deltek Vision, T-SQL, SQL Server Management Studio, SQL Server, SSRS, Power BI
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1mo
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Information Systems Administrator
Hawthorne, California, United States
OnsiteFull Time
Quantum Space
Quantum Space: Developing maneuverable spacecraft platforms for defense and commercial missions.
4+ YOE4+ years in system administration/DevOps/cloud/network support; experience with Linux/macOS/Windows, scripting (BASH/Shell/YAML), IaC (Terraform/Ansible/Puppet), Azure/AWS, IdP/SAML, cybersecurity (CompTIA Security+), and ability to obtain/maintain security clearance.
Linux, macOS, Windows, BASH, Shell, YAML, Terraform, Ansible, Puppet, Microsoft Azure, Amazon Web Services, IdP, SAML
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1mo
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Systems Administrator IV
Edwards AFB or Lancaster or Palmdale
$97k-$130k/yr OnsiteFull Time
JT4
JT4NYSE: AMTM: Provides engineering and technical support for military test ranges.
9+ YOERequires 9+ years computer systems experience, bachelor’s degree or equivalent, U.S. citizenship, ability to obtain Top Secret with Special Access, CompTIA Security+ (DoD IAM Level II) within 6 months, valid driver’s license, Windows/Red Hat, Splunk, ACAS, Active Directory experience.
Splunk, ACAS, Trellix ePolicy Orchestrator, DoD STIGs, IAVM, SCAP, Virtualization, VDI, Windows Operating Systems, Red Hat Operating Systems, Active Directory, IAO Express, Network-Attached Storage (NAS), Storage Area Network (SAN)
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1w
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Linux Systems Administrator II
Fullerton, California, United States
$6k-$9k/mo OnsiteFull Time
California State University
California State University: Public university system providing higher education and academic research.
2+ YOEBachelor's degree or equivalent experience, two years of relevant systems administration experience, Linux server administration, troubleshooting, scripting, virtualization, cloud technologies, communication, and a valid California driver's license.
Linux, High Performance Computing (HPC), Docker, Podman, Singularity, Apptainer, Kubernetes, Ansible, Puppet, Chef, Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform, Nagios, Prometheus, Grafana, Zabbix, Simple Linux Utility for Resource Management (SLURM)
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