19 senior it systems administrator jobs at 13 companies in Castaic, CA
1mo
Save
Mark Applied
Hide
Sr. IT Systems Administrator, IT Applications
Hawthorne or Bastrop or Redmond
$95k-$150k/yr OnsiteFull Time
3+ YOE3+ years (with degree) or 5+ years experience managing enterprise applications, Atlassian administration, API/GraphQL/webhook integrations, scripting (Groovy/Python/Java), and strong customer-facing skills.
Jira Software, Jira Service Management, Confluence, RESTful APIs, GraphQL, webhooks, Groovy, Python, Java, SQL, ScriptRunner
1mo
Save
Mark Applied
Hide
Sr. IT Systems Administrator, IT Applications
Bastrop or Hawthorne or Redmond
OnsiteFull Time
3+ YOEBachelor's degree or equivalent experience, 3+ years designing and managing enterprise applications, expertise with Atlassian administration, API/GraphQL/webhook integrations, scripting (Groovy/Python/Java), and strong stakeholder communication.
Jira Software, Jira Service Management, Confluence, RESTful APIs, GraphQL, webhooks, Groovy, Python, Java, SQL, ScriptRunner, Linux, OAuth
2mo
Save
Mark Applied
Hide
IT Systems Administrator - Millennium Space Systems
El Segundo, California, United States
$103k-$174k/yr OnsiteFull Time
Maintain and configure secure enterprise and air-gapped systems; administer Windows Server, VMware, and Red Hat Linux; obtain DoD IAT/ Security+ certifications; active U.S. TS/SCI security clearance required.
Windows Server, Windows 10, VMware vCenter, VMware vSphere, Red Hat Linux, Active Directory (AD), VEEAM Backup Suite, Power Protect Data Manager, Cisco, Palo Alto, Juniper, DNS, Group Policy, Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft Project, DoD STIGs
2mo
Save
Mark Applied
Hide
IT Systems Administrator - Millennium Space Systems
El Segundo, California, United States
$103k-$174k/yr OnsiteFull Time
Maintain and administer secure enterprise and air-gapped systems (Windows Server, VMware, Red Hat Linux); provide Tier II support; maintain documentation; must hold an active U.S. Top Secret/SCI clearance and be a U.S. Person.
Windows Server, Windows 10, VMware vCenter, vSphere, Red Hat Linux, Active Directory, DoD STIGs, Cisco, Palo Alto, Juniper, VEEAM Backup Suite, Power Protect Data Manager, DNS, Group Policies, Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft Project
18h
Save
Mark Applied
Hide
Senior IT Administrator
Sherman Oaks, California, United States
$140k-$150k/yr HybridFull Time
5+ YOERequires 5+ years in IT systems administration or endpoint management, MDM/EMM experience, IAM proficiency, SaaS administration, security and incident response knowledge, documentation skills, and staff management experience.
Jamf, Intune, SSO, MFA, Okta, Azure AD, Google Workspace, Salesforce, Qlik, Tableau, Mac, PC, SOC 2, SIG, CAIQ, DPA, MSA
18h
Save
Mark Applied
Hide
Senior IT Administrator
Sherman Oaks or United States
$140k-$150k/yr HybridFull Time
5+ YOERequires 5+ years in IT systems administration or endpoint management, junior staff management experience, MDM/EMM expertise, IAM, SaaS administration, security frameworks, incident response, process documentation, and strong communication.
Jamf, Intune, SSO, MFA, Okta, Azure AD, Google Workspace, Salesforce, Qlik, Tableau, MDM/EMM, SOC 2, SIG, CAIQ, DPA, MSA
1mo
Save
Mark Applied
Hide
Senior IT Administrator
El Segundo, California, United States
$99k-$117k/yr OnsiteFull Time
5+ YOE5+ years IT support/systems administration, strong AD/Azure AD/Entra ID, M365 and Intune skills, AWS experience, IT security knowledge, advanced troubleshooting, and strong communication.
Active Directory, Azure AD/Entra ID, Microsoft Outlook, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, Microsoft Purview, Intune, AWS, VPN
2w
Save
Mark Applied
Hide
IT & Systems Administrator - SoCal Region
San Diego or Vista or San Juan Capistrano or Redondo Beach or Orange or Oceanside or California
$38-$46/hr HybridFull Time
5+ YOERequires 5+ years of IT administration and end-user support, Microsoft 365 and Entra ID experience, endpoint management, PowerShell, Windows Server, Active Directory, networking, a California driver's license, and regular regional travel.
Microsoft 365, Exchange Online, Microsoft SharePoint, OneDrive, Microsoft Teams, Entra ID (Azure AD), Entra Connect, Active Directory, Microsoft Intune, PowerShell, NetSuite, Celigo, RingCentral, Point-of-sale systems, Windows Server, RMM, VMWare, MS-102, AZ-104, SC-300, MD-102
1mo
Save
Mark Applied
Hide
IT Systems Administrator-Collaboration Tools
Ventura, California, United States
$78k-$142k/yr OnsiteFull Time
5+ YOEAdminister and automate collaboration, productivity, and AI platforms; troubleshoot complex issues; ensure security, compliance, and governance; 5+ years experience; PowerShell skills; ITIL and SOX experience desired.
Microsoft 365, Microsoft Exchange Online, Microsoft SharePoint Online, Microsoft OneDrive, Microsoft Power Platform, Microsoft Copilot Chat, Microsoft PowerShell, Slack, Zoom, Smartsheet, MPC Servers
1w
Save
Mark Applied
Hide
IT Systems Administrator, Sr. (Level 3) / Onsite: Palmdale, CA
Palmdale, California, United States
$96k-$178k/yr OnsiteFull Time
Requires Windows and Red Hat Linux administration, RMF and STIG implementation, vulnerability remediation, security management, DoD 8570 IAT II/III certification, U.S. citizenship, and ability to lift 30 pounds.
Windows 10/11, Windows Server, Red Hat Linux 7/8/9, Risk Management Framework (RMF), Security Technical Implementation Guide (STIG), Nessus, McAfee, Shavlik, SCAP, VMware, Horizon, vSphere, vCenter, vCloud, vRealize, NSX, vSAN, VXRail, NetApp, EMC, TCP/IP, DNS, DHCP, LDAP, MCSE, Network+
1mo
Save
Mark Applied
Hide
IT Infrastructure Systems Architect
El Segundo, California, United States
$117k-$176k/yr OnsiteFull Time
8+ YOEBachelor's in a technology field,8+ years in IT systems administration/architecture, expertise with Windows/Linux, patch management, security-informed architecture and ability to obtain DoD Secret clearance.
Windows, Linux, VMware, Hyper-V, Xen, KVM, CNCF Kubernetes, Red Hat OpenShift, SUSE Rancher, AWS, Microsoft Azure, GCP, ITIL, Raspberry Pi
3w
Save
Mark Applied
Hide
IT Support Specialist
Sherman Oaks, California, United States
OnsiteFull Time
5+ YOE5+ years IT systems administration experience, hands-on MDM/EMM and identity management (SSO/MFA), SaaS administration (Salesforce,Qlik,Tableau), security and incident response, and experience managing junior IT staff.
Jamf, Intune, Okta, Azure AD, Google Workspace, Salesforce, Qlik, Tableau
2w
Save
Mark Applied
Hide
Senior IT Support Engineer
Los Angeles, California, United States
$130k-$145k/yr OnsiteFull Time
5+ YOERequires 5+ years in IT support, endpoint management, or systems administration; 2+ years in a senior or escalation role; Microsoft Entra ID, Intune, PowerShell, Power Automate, ITSM, remote support, and multi-site experience.
Microsoft Entra ID, Intune, Microsoft 365, PowerShell, Power Automate, Microsoft Copilot, Power BI, SharePoint, OneDrive, Teams, Microsoft Remote Assist, Quick Assist, RDP, TeamViewer, Power Apps, Zapier, Make, n8n, Claude, Gemini, Confluence, Microsoft Windows
2w
Save
Mark Applied
Hide
Senior IT Support Engineer
Los Angeles, California, United States
$130k-$145k/yr OnsiteFull Time
5+ YOERequires 5+ years in IT support, endpoint management, or systems administration; 2+ years in a senior or escalation role; Microsoft Entra ID, Intune, Microsoft 365, PowerShell, Power Automate, ITSM, and multi-site support experience.
Microsoft Entra ID, Intune, Microsoft 365, PowerShell, Power Automate, Microsoft Copilot, Power BI, ITIL, Microsoft Remote Assist, Quick Assist, RDP, TeamViewer, Power Apps, Zapier, Make, n8n, Claude, Gemini, SharePoint, OneDrive, Teams, Confluence, Microsoft Windows, Azure AD
5d
Save
Mark Applied
Hide
IT Cloud & Identity Administrator II (Remote)
Los Angeles, California, United States
$123k-$128k/yr RemoteFull Time
5+ YOEBachelor’s degree preferred or equivalent experience; 5+ years in systems, cloud, identity, or security administration; advanced Microsoft cloud expertise and knowledge of access management, security operations, scripting, and automation.
Microsoft 365, Microsoft Entra ID, Microsoft Azure, AWS, Active Directory, Microsoft Intune, Autopilot, Exchange Online, Microsoft SharePoint, Microsoft OneDrive, Microsoft Teams, PowerShell, SAML, OIDC, SCIM, Terraform, CIS, NIST, SOC 2, ISO 27001
6d
Save
Mark Applied
Hide
IT Manager
Los Angeles or New York City
$85k-$100k/yr OnsiteFull Time
5+ YOERequires 5+ years in IT support, systems administration, or network engineering; expertise in Windows, macOS, Google Workspace, Active Directory, Group Policy, Office 365, networking, cloud platforms, ITSM, budgets, and vendors.
Windows, macOS, Google Workspace, Active Directory, Group Policy, Office 365, TCP/IP, DNS, DHCP, VLANs, VPNs, AWS, Azure, Google Cloud, ServiceNow, Jira, Zendesk, PowerShell, Python
5d
Save
Mark Applied
Hide
Facilities & IT Operations Coordinator (PCN 367)
Los Angeles, California, United States
$29-$33/hr OnsiteFull Time
5+ YOEAssociate degree preferred or equivalent experience, 5+ years administrative support experience, Microsoft Office 365 proficiency, strong organization and communication skills, and experience with facilities, operations, IT, vendors, or ticketing systems preferred.
Microsoft Office 365, Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft Teams, Microsoft PowerPoint
1mo
Save
Mark Applied
Hide
Level 3 IT Analyst
Glendale, California, United States
$80k-$100k/yr OnsiteFull Time
5+ YOE5+ years IT support experience; strong Windows and Microsoft-based environment troubleshooting; Active Directory and Microsoft 365 administration; endpoint management, networking fundamentals, ticketing system experience, and documentation skills.
Active Directory, Microsoft 365, Exchange Online, Microsoft Teams, Microsoft SharePoint, OneDrive, Microsoft Entra ID, Microsoft Intune, SCCM, PDQ, NinjaOne, ConnectWise, Kaseya, Jira Service Management, Freshservice, Zendesk, ServiceNow, VMware, Hyper-V, PowerShell
1w
Save
Mark Applied
Hide
IT Support Supervisor
Chatsworth, California, United States
$70k-$85k/yr OnsiteFull Time
5+ YOE2+ MgmtBachelor's degree preferred or equivalent experience; 5+ years in IT operations or systems administration, including 2+ supervisory years. Requires multi-site infrastructure, security systems, Mac/PC, Apple Business Manager, Jamf MDM, and Ubiquiti Cloud Network experience.
Microsoft Office, Google Workspace, Apple Business Manager, Jamf MDM, Ubiquiti Cloud Network, Mac, PC, HIPAA
Explore Jobs