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211 junior systems administrator jobs at 149 companies in Costa Mesa, CA

2mo
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Systems Administrator
Los Angeles, California, United States
$85k-$120k/yr OnsiteFull Time
Antares Nuclear
Antares Nuclear: Factory-produced, deployable fission microreactors to provide strategic energy for mission-critical systems across Earth, space, and underseas.
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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21h
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Systems Administrator (Systems Administrator II), Enterprise and Cloud Services
San Bernardino, California, United States
$6k-$9k/mo OnsiteFull Time
California State University, San Bernardino
California State University, San Bernardino: The 23-campus public university system of California.
2+ YOEBachelor's degree in a related field and 2 years of relevant experience, or equivalent substitutions. Requires system administration, cloud, troubleshooting, communication, analytical, and organizational skills.
Adobe Sign, NCS, SimpleK, SMS, Vanderbilt, Sunbelt, WebTMA, Qualtrics, Gradescope, Microsoft 365, Microsoft Intune, Google, Software-as-a-Service (SaaS), Information Technology Services (ITS), ITIL, ADA, HIPAA, FERPA
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3w
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IT Systems Administrator II
Garden Grove, California, United States
OnsiteFull Time
Evans Manufacturing
Evans Manufacturing: Evans Manufacturing is a promotional-products manufacturer making plastic and fabric branded goods for business customers.
2+ YOERequires 2+ years in Windows systems or network administration and two or more relevant certifications, such as CompTIA A+, CompTIA Network+, MCSA, or CCNA. Bachelor's degree or equivalent experience desired.
Active Directory, Entra ID, Hyper-V, VMware, Microsoft 365, Zoom Phone, Contact Center, Google Workspace, Windows Server, OS X, Linux, UniFi Access Points, UniFi Cameras, Checkpoint Harmony Endpoint Protection, Checkpoint Harmony Email & Collaboration, Ubiquiti UniFi, Exchange Online, Windows 365, Windows Sandbox
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1mo
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Network Systems Administrator
El Segundo, California, United States
$71k-$119k/yr OnsiteFull Time
ManTech International
ManTech International: Advancing the future of defense through innovative technology.
1+ YOEProvide day-to-day administration of secure Windows networks for classified environments; maintain servers, firewalls, backups, and support customers. Must hold TS/SCI and meet DoD IAT II certification requirements.
Microsoft Windows Server, Microsoft Exchange Server
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2mo
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Engineering Solutions Systems Administrator (TeamCenter)
Costa Mesa, California, United States
$146k-$194k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology developing AI-powered autonomous military systems.
2+ YOE2+ years TeamCenter PLM administration and engineering systems experience; knowledge of CAD/CAE tool integration, Windows/Linux, strong troubleshooting and communication, and must be a U.S. person.
TeamCenter, Teamcenter, PLM, MCAD, ECAD, CAE, MBSE, Requirements Management, NX, SimCenter, Siemens, Windows, Linux, Lattice OS
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1mo
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Retail Systems Support Administrator
Irvine, California, United States
$23-$26/hr OnsiteFull Time
Boot Barn
Boot BarnNYSE: BOOT: Nation's leading lifestyle retailer of western and work-related apparel.
2+ YOE2+ years with Epicor/Aptos or enterprise POS, strong communication and customer service, Bachelor's in CS/Business or equivalent experience, MS Office proficiency, ability to translate complex concepts.
Epicor, Aptos, POS, Microsoft Office Suite
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3mo
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Payroll Administrator
Torrance, California, United States
$25-$28/hr OnsiteFull Time
Lovisa
LovisaASX: LOV: Global fast-fashion jewellery and accessory retailer.
2+ YOEProcess Americas payroll, set up employees in time & attendance and payroll systems, maintain payroll records, respond to payroll inquiries, ensure accuracy and confidentiality.
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1w
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Volunteer Management System Administrator
Rancho Palos Verdes, California, United States
$29-$30/hr OnsitePart Time
The Salvation Army Western Territory
The Salvation Army Western Territory: Christian nonprofit social-services organization serving people in need across 13 western U.S. states and Pacific territories.
2+ YOEHigh school diploma required; associate or bachelor's degree preferred. Requires 2+ years of administrative, operations, customer support, or systems support experience and Microsoft Office proficiency.
Golden, Microsoft Office, Microsoft Word, Microsoft Excel, Microsoft Outlook, Information Technology (IT)
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2mo
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IS System Administrator
Temecula, California, United States
$123k-$135k/yr OnsiteFull Time
Universal Health Services
Universal Health ServicesNYSE: UHS: A leading provider of hospital and healthcare services.
IT systems administration; AD governance; Azure; VDI; enterprise infrastructure experience.
Active Directory, Azure, VMware Horizon, VDI, Enterprise Cloud Identity, Hypervisor
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14h
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IT Systems & Facilities Administrator
Irvine or Inglewood or Long Beach or Los Angeles or Riverside or Oakland
$30/hr HybridFull Time
Irvine Clinical Research
Irvine Clinical Research: Independent clinical research site network studying memory loss, depression, obesity, neurology, and psychiatry for participants and sponsors.
1+ YOEBachelor's degree or equivalent technical experience; 1+ year administering Windows, Active Directory, Google Workspace, and Microsoft 365. Requires networking, cybersecurity, hardware troubleshooting, California driver's license, and ability to lift 50+ lbs.
Microsoft Active Directory, Google Workspace, Microsoft 365, Windows OS, Multi-Factor Authentication (MFA), Endpoint Detection & Response (EDR), routers, switches, Wi-Fi access points, VOIP, CTMS, CRM, webcams, microphones, headsets, DNS, temperature sensors, gateways, backup batteries, appliance dollies, hand trucks, moving straps, Home Depot, Enterprise
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1mo
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IT System Administrator
Los Angeles or El Segundo or Hawthorne
$80k-$100k/yr OnsiteFull Time
Freeform
Freeform: AI-native metal 3D-printing manufacturer serving aerospace, defense, energy, semiconductor, automotive, and other industrial customers.
1+ YOE1+ years system administration experience with on-prem infrastructure, Windows/Linux administration, Active Directory/Azure AD, endpoint management (Intune,GPO), networking, AV support, lifting ability, and security-first mindset.
Kubernetes (k8s), Ansible, PowerShell DSC, AWS, Azure, GCP, Grafana, Prometheus, Python, Bash, PowerShell, Siemens Teamcenter, MATLAB, Visual Studio, Active Directory, Azure AD / Entra ID, Microsoft Intune, Group Policy (GPOs), SAN
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2d
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Document Control Administrator
San Clemente, California, United States
$30-$40/hr OnsiteFull Time
XLR8 EMS
XLR8 EMS: Precision PCBA manufacturing with unmatched speed, quality, and flexibility.
2+ YOEHigh school diploma required; associate or bachelor's preferred. Requires 2+ years of manufacturing document control experience, advanced Microsoft Word and Adobe Acrobat proficiency, and quality-system familiarity.
Microsoft Word, Adobe Acrobat
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2w
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Systems Operator
Colton, California, United States
$26-$30/hr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Global retail, e-commerce, and supply chain.
0.5+ YOERequires 6 months Walmart Logistics clerical experience or 1 year clerical experience using email, spreadsheets, and word processing applications.
Microsoft Office, Microsoft Excel
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1mo
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Branch Office Administrator - San Juan Capistrano, CA
San Juan Capistrano, California, United States
OnsiteFull Time
Edward Jones
Edward Jones: Financial services firm providing wealth management and investment advice.
Provide client service, account administration, and office support; strong analytical, attention to detail, digital tool use, and conversational skills; willingness to learn financial services systems.
MoneyGuide, Salesforce, Microsoft Office
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3w
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Application Administrator Assoc
El Segundo, California, United States
$74k-$93k/yr OnsiteFull Time
Kinecta Federal Credit Union
Kinecta Federal Credit Union: Member-owned nonprofit federal credit union providing banking, lending, insurance, and wealth services to members and employer groups.
1+ YOERequires nCino and Salesforce experience, 1–2 years of system administration, 5 years in financial services with commercial loan exposure, and a bachelor's degree or applicable technical experience.
nCino, Salesforce, Salesforce Financial Services Cloud, CASH, SilverLake, Symitar, Microsoft Windows, Microsoft Word, Microsoft Excel
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1w
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Data Security Administrator
Commerce or Los Angeles
$89k-$111k/yr HybridFull Time
AltaMed Health Services
AltaMed Health Services: Providing quality health and human services to underserved communities.
2+ YOEBachelor's degree in computer science, IT, cybersecurity, or related field; associate degree may qualify with experience. Requires 2–4 years in IT security or systems administration.
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5d
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Warehouse Clerical Support Administrator
Los Angeles, California, United States
$20-$29/hr OnsitePart Time, Seasonal
Best Buy
Best BuyNYSE: BBY: Multinational retailer of technology products and services.
Able to stand and sit for extended periods, work in a non-climate-controlled environment, lift up to 50 pounds, use Microsoft Office, and learn software and operating systems; customer service experience preferred.
Microsoft Office
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1mo
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Systems Operations Specialist
Pasadena, California, United States
$26-$29/hr OnsiteFull Time
ACCO Engineered Systems
ACCO Engineered Systems: Mechanical contractor providing design, construction, and maintenance services.
High school diploma or equivalent, data entry (50 WPM), strong organizational skills, payroll entry, timesheet processing, documentation of start-up and warranty reports, proficiency with Microsoft Excel/Word, Gmail, Google Drive/docs/sheets, PDF Writer, Bluebeam, Smartsheet, Box, Rhumbix, and 360/IFS.
Microsoft Excel, Microsoft Word, Gmail, Google Drive, Google Docs, Google Sheets, PDF Writer, Bluebeam, Smartsheet, Box, Rhumbix, 360/IFS
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2mo
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System Administrator
Glendale, California, United States
$103k-$130k/yr OnsiteFull Time
Front Porch Communities and Services
Front Porch Communities and Services: Nonprofit organization dedicated to human-centered senior living.
2+ YOEMaintain and secure servers, networks, backups and monitoring; provide onsite and remote Tier I/II support, on-call coverage, and perform maintenance and disaster recovery tasks.
VMware, Windows Server, Linux, HPE, Pure, Veeam, Veeam Backup and Replication, Backup Exec, VMware Horizon, Citrix, Citrix NetScaler, Azure Windows Virtual Desktop, Active Directory, Exchange, Exchange Online, Group Policy, DNS, DFS, DHCP, SQL, PKI, SharePoint, SCCM, Azure, Skype for Business, Teams, ADFS, M365, Nagios, ManageEngine, Microsoft monitoring solutions, Cisco AnyConnect, iLO, TeamViewer, Remote Desktop, VNC, SSH, telnet, FTP, SDWAN
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2w
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System Administrator
El Segundo, California, United States
$76k-$144k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: Aerospace and defense providing advanced technology solutions.
2+ YOEUniversity degree or equivalent experience plus 2 years relevant experience, Windows or Linux experience, active Secret clearance, and U.S. citizenship. Must obtain CompTIA Security+ CE or equivalent within 6 months.
Microsoft Windows, Red Hat Enterprise Linux, ESXi, vCenter, Microsoft Active Directory, DNS, DHCP, Ansible, RAID
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