HiringCafe
Join our community

483 systems administrator jobs at 307 companies in Irvine, CA

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
4w
Save
Mark Applied
Hide
Systems Administrator
Norwalk, California, United States
$60k-$70k/yr OnsiteFull Time
Meriplex
Meriplex: Provides managed IT, cybersecurity, and cloud infrastructure services.
Level 2 systems administrator to resolve end-user issues, support Active Directory/Office365, VMware, Azure, firewalls, SAN, backups, VPN, and perform on-site equipment installations; MSP experience encouraged.
Active Directory, Office365, Microsoft 365, VMware, Azure, Microsoft Exchange, RMM, TCP/IP, GPO, VPN, SAN
Job PostingView all
3w
Save
Mark Applied
Hide
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
Job PostingView all
1mo
Save
Mark Applied
Hide
Systems Administrator
Irvine, California, United States
$71k-$80k/yr OnsiteFull Time
Boot Barn
Boot BarnNYSE: BOOT: Specialty retailer of western and work-related apparel and footwear.
3+ YOE3+ years system administration experience; strong Windows Domain, Group Policy, Microsoft Intune, Exchange/Office 365, PowerShell, Active Directory, Windows Server, virtualization, networking, and Azure/AWS experience; bachelor's or equivalent; strong communication and ability to work independently.
Microsoft Intune, Microsoft Exchange Hybrid, Microsoft Exchange Online, O365, Microsoft PowerShell, Exchange Shell, Microsoft Active Directory, Microsoft Windows Server, Linux, Microsoft Azure, AWS, MDM
Job PostingView all
3w
Save
Mark Applied
Hide
IT Systems Administrator
Orange, California, United States
$80k-$115k/yr OnsiteFull Time
Winchester Interconnect
Winchester Interconnect: Designs and manufactures custom connectors and cable assemblies.
8+ YOE8+ years systems administration experience in multi-site manufacturing; 8+ years SQL/database administration; proficiency with Windows Server, Linux/Unix, virtualization, cloud platforms, networking, backup/DR, and cybersecurity.
Google Enterprise, ADP, Crowdstrike Falcon, Tanium, Microsoft Active Directory, GlobalShop, SQL, Microsoft Windows Server, Linux/Unix, VMware, Microsoft Hyper-V, AWS, Microsoft Azure, Google Cloud
Job PostingView all
1mo
Save
Mark Applied
Hide
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)
Job PostingView all
1w
Save
Mark Applied
Hide
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
Job PostingView all
1mo
Save
Mark Applied
Hide
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+
Job PostingView all
1mo
Save
Mark Applied
Hide
Sr. Systems Administrator
El Segundo or Washington or Huntsville
$130k-$165k/yr OnsiteFull Time
Varda Space Industries
Varda Space Industries: Develops in-orbit manufacturing platforms and reentry capsules for pharmaceuticals.
5+ YOE5+ years systems administration with 3+ years on identity platforms; strong Okta, Entra ID/Azure AD, Microsoft 365, JAMF Pro, Intune, Active Directory, and PowerShell skills; experience with ITAR/NIST/CMMC compliance and scripting (PowerShell, Python, Bash).
Okta, Okta Workflows, Okta System Log, Microsoft 365 GCC High, Azure, Entra ID, Entra Connect, Microsoft Exchange Online, Microsoft SharePoint Online, Microsoft Teams, JAMF Pro, Microsoft Intune, Active Directory, PowerShell, Python, Bash, Azure Logic Apps, Power Automate, SCIM, SAML, OIDC, Microsoft Graph API, Google Workspace, Jira, Confluence, Slack, Smartsheet, 1Password, CrowdStrike, Vanta, PagerDuty, Snowflake
Job PostingView all
4w
Save
Mark Applied
Hide
Senior Systems Administrator
Torrance, California, United States
$110k-$137k/yr OnsiteFull Time
Red Cat Holdings
Red Cat HoldingsNASDAQ: RCAT: Providing all-domain drone and robotic solutions for defense.
7+ YOE7+ years systems administration experience, 3+ years in senior/lead capacity. Strong Windows, Linux, Microsoft 365, Azure/AWS, identity, endpoint, backup, monitoring, Jira/Confluence, scripting (PowerShell/Python/Bash), security and incident response. US work authorization required for ITAR/EAR roles.
Microsoft 365, Microsoft GCC High, Windows, Linux, macOS, Entra ID, Active Directory, DNS, DHCP, Group Policy, Azure, AWS, PowerShell, Jira, Jira Service Management, Confluence, Smartsheet, Adobe Acrobat, SolidWorks PDM, GitLab, GitHub, Jenkins Build Server, Microsoft Intune, Microsoft Autopilot, Microsoft Defender, Microsoft Purview, Exchange Online Protection, VMware, Python, Bash
Job PostingView all
4w
Save
Mark Applied
Hide
Senior Systems Administrator
Torrance, California, United States
$110k-$137k/yr OnsiteFull Time
Red Cat Holdings
Red Cat HoldingsNASDAQ: RCAT: Manufacturing tactical drone systems for defense and security.
7+ YOE7+ years systems administration experience (3+ in senior/lead capacity). Strong Windows/Linux/macOS, Active Directory/Entra ID, Azure/AWS, endpoint, backup, monitoring, and incident response skills; Jira/Confluence experience; strong communication and troubleshooting; background check and U.S. work authorization required for export‑restricted roles...
Microsoft 365, Microsoft GCC High, Windows Server, Windows, Linux, macOS, Microsoft Entra ID, Microsoft Azure AD, Active Directory, DNS, DHCP, Group Policy, Microsoft Exchange Online, Microsoft SharePoint, Microsoft Teams, Microsoft OneDrive, Microsoft Exchange Online Protection, Azure, AWS, Jira, Jira Service Management, Confluence, Smartsheet, Adobe Acrobat, SolidWorks PDM, GitLab, GitHub, Jenkins Build Server, PowerShell, Python, Bash, Microsoft Intune, Microsoft Autopilot, Microsoft Defender, Microsoft Purview, VMware
Job PostingView all
1mo
Save
Mark Applied
Hide
Senior Systems Administrator
Commerce, California, United States
$99k-$124k/yr HybridFull Time
AltaMed
AltaMed: Provides comprehensive healthcare services to underserved Southern California communities.
7+ YOE7+ years in Systems Administration; 2+ years designing/implementing IT systems; Bachelor’s in CS/CIS/MIS preferred; Microsoft/VMware/Cisco/CompTIA certifications preferred.
Microsoft, VMware, Cisco, CompTIA
Job PostingView all
1w
Save
Mark Applied
Hide
Infrastructure Systems Administrator
San Marcos or Escondido or Rancho Bernardo or Fallbrook
$8k-$10k/mo OnsiteFull Time
Palomar College
Palomar College: Public community college providing associate degrees and vocational training.
2+ YOE2 years telecommunications and network systems administration experience; bachelor’s degree (or equivalent) in MIS/IT/CS; ability to configure, implement, test OS/server releases and VoIP systems; valid California driver’s license by appointment.
Cisco, Microsoft Teams, Session Border Controller (SBC), SIP, VoIP, Active Directory
Job PostingView all
2w
Save
Mark Applied
Hide
IT Systems Administrator Intern
Culver City, California, United States
OnsiteInternship
Servicon
Servicon: Provides professional cleaning and facility maintenance for complex environments.
Student in later stages of computer science/IT or related program; provide Tier 1/2 support for Windows and iOS, assist with onboarding/offboarding, MDM, Microsoft 365 administration, system maintenance, and documentation.
Windows, iOS, Mobile Device Management (MDM), Microsoft 365, HRIS
Job PostingView all
1mo
Save
Mark Applied
Hide
Network & Systems Administrator
Newport Beach, California, United States
$90k-$130k/yr OnsiteFull Time
Best Choice Products
Best Choice Products: E-commerce retailer of home, garden, and family consumer products.
3+ YOEBachelor’s degree in MIS/IS/CS/CE; 3-5 years hands-on network and systems administration; cloud infra experience; strong networking and Microsoft tech skills; IT security and project experience.
Microsoft 365, Azure, Entra ID, Exchange Online, Teams, SharePoint, DNS, NetSuite, Jira, Confluence, Slack, Warehouse Management Systems, Virtualization, IDS/IPS, Antivirus, Email Security
Job PostingView all
6d
Save
Mark Applied
Hide
Systems Administrator (ERP)
Long Beach, California, United States
$90k-$110k/yr HybridFull Time
SCS Engineers
SCS Engineers: Provides environmental engineering, consulting, and waste management solutions.
8+ YOEBachelor's degree required; 8+ years ERP experience (Deltek Vantagepoint preferred), 4+ years ERP administration, T-SQL and SQL Server experience, SSRS report development, Power BI experience a plus.
Deltek Vantagepoint, T-SQL, SQL Server Management Studio, SQL Server, SSRS, Power BI
Job PostingView all
1mo
Save
Mark Applied
Hide
Classified Systems Administrator
Woburn or Boston or Arlington or Dayton or Melbourne or Carlsbad
$115k-$160k/yr OnsiteFull Time
Systems & Technology Research
Systems & Technology Research: Develops advanced technology for national security and defense applications.
3+ YOETS/SCI with CI Polygraph required; U.S. citizenship. 3+ years technical experience or equivalent. Linux (Red Hat/CentOS/Ubuntu) and Windows administration, Active Directory, networking, NAS, firewall, PowerShell automation, DoD security guidance knowledge, and after-hours support.
Red Hat, CentOS, Ubuntu, Windows, NAS Storage, Firewall, Microsoft Active Directory, Group Policy, PowerShell, Enterprise Virtualization Tools, Multi-Factor Authentication, Public Key Infrastructure, Web Server, LDAP, Security Technical Implementation Guidelines (STIGS), Security Content Automation Protocol (SCAP), Host Based Security System (HBSS), Assured Compliance Assessment Solution (ACAS), DoD Ports, Protocols, and Services (PPS)
Job PostingView all
4w
Save
Mark Applied
Hide
Sr. Principal Systems Administrator
El Segundo or United States
$118k-$225k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
8+ YOEU.S. citizen with active Secret DoD clearance, typically 8+ years' systems administration experience (or Advanced Degree +5 years). Experience with Red Hat Enterprise Linux, Microsoft Windows/AD, VMware, storage, backups, and security; CompTIA Security+ CE (DoDD 8140/8570) required within 6 months.
Red Hat Enterprise Linux, Active Directory, DNS, DHCP, VMware, VMware vCenter, vSphere, ESX, Splunk, Linux, Windows 10, Windows 11, Microsoft WSUS, Microsoft SCCM, Microsoft Exchange, NAS, SAN
Job PostingView all
1w
Save
Mark Applied
Hide
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
Job PostingView all
3w
Save
Mark Applied
Hide
Administrator I, Quality Systems
Torrance, California, United States
OnsiteFull Time
Herbalife
HerbalifeNYSE: HLF: A global nutrition selling weight management and dietary supplements.
3+ YOEMaintain and support Quality Enterprise Systems (LIMS, VLMS, CMS, QMS), administer security, configure systems, support users, work with Oracle/MSSQL, ensure cGMP compliance; Bachelor's in Science/Technology and 3+ years industry experience.
Labware LIMS, Vaisala CMS, Valgenesis VLMS, QMS, Oracle, MSSQL, Waters Empower, Agile
Job PostingView all
1mo
Save
Mark Applied
Hide
Legal Systems Administrator - Talent Systems
Los Angeles or San Francisco
$125k-$130k/yr RemoteFull Time
Munger, Tolles & Olson
Munger, Tolles & Olson: A national law firm providing high-profile legal representation and professional business support services.
Administer and optimize legal recruiting, performance evaluation, and AI systems; strong system design/configuration, integration, troubleshooting, stakeholder collaboration, and documentation skills; law firm experience preferred.
viRecruit, viEval, viWork Allocation, viCLE, Workday, Microsoft Dynamics 36, Microsoft 365 Suite
Job PostingView all

Explore Jobs

Expand Your Job Search