IT Systems, Network, & Security Administrator Jobs

IT Systems, Network, & Security Administrator

Tech Holding

Location:
United States, Los Angeles

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

We’re seeking a IT Systems, Network, & Security Administrator for a project-based assignment to provide hands-on IT support and infrastructure administration across a hybrid environment. You'll focus on email security, endpoint management, and general IT operations across multiple Los Angeles-based locations.

Job Responsibility:

Administer and support the organization’s cloud-based email security platform, Mimecast, for issues relating to threat investigation, message tracing, and policy management
Monitor and respond to phishing, spoofing, and impersonation attempts
Perform physical network troubleshooting, including identifying cabling faults, checking patch panels, validating link lights, and ensuring proper switch/AP connectivity
Support the organization’s cloud-based identity and access management platform, Okta, day-to-day operations regarding user access, SSO access to internal and SaaS applications, and multi-factor authorization (MFA) issue resolution
Manage and monitor the organization's mobile device management (MDM) platforms, Microsoft Intune and Kandji, troubleshooting MDM enrollment issues, profile errors, and missing agents
Provide support and troubleshoot device compliance, deployment, and access issues for Windows and macOS devices
Oversee user account management in Microsoft 365, Entra ID, and Active Directory
Support employee onboarding and offboarding, including user provisioning, device setup, and access changes
Provide Tier 1–3 helpdesk support, including MFA, password resets, access issues, and escalation handling
Review and triage security alerts in Microsoft Defender and Entra ID
Work cross-functionally and collaboratively with internal teams to resolve IT incidents and outages across various worksites
Provide clear and detailed documentation regarding issues, resolutions, and any organizational environmental changes during the coverage period
Continuously review, report, and escalate critical security or infrastructure issues to leadership and other appropriate contacts
Perform other duties as assigned by Supervisor/Management

Requirements:

Bachelor’s degree from an accredited university in Business, Technology, or a related field required
At least 3 years of experience in an IT Systems Admin, Security Admin, or Senior IT Support role
Prior experience with cloud-based email security software, preferably Mimecast
Experience with mobile device management (MDM), preferably Microsoft Intune and/or Kandji
Strong knowledge of Microsoft 365 administration and Entra ID
Prior experience troubleshooting identity, access, and MFA-related issues
Solid understanding of email security concepts such as phishing, spoofing, DMARC, DKIM, and SPF
Comfortable supporting a mixed Windows and macOS environment
Ability to work in an unstructured, fast-paced environment while making sound judgment calls in security and user access scenarios
Must have a valid driver’s license and a reliable and fully insured vehicle as this role will be traveling throughout Los Angeles to support staff at LAFC Headquarters, BMO Stadium, and the LAFC Performance Center at California State University – Los Angeles

Nice to have:

Experience with basic network troubleshooting (switching, wireless, firewall concepts) preferred
Familiarity with Cisco networking and firewall environments preferred
Familiarity with GPON network infrastructure, including basic troubleshooting and fault isolation, is a plus
Prior experience with Microsoft Defender for Office 365 / Defender for Endpoint preferred
Prior experience in a hybrid on-premises + cloud environment is a plus

Additional Information:

Job Posted:
December 12, 2025

Work Type:

Hybrid work

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IT Systems, Network, & Security Administrator

Tech Holding

Location:
United States, Los Angeles

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
December 12, 2025

Looking for more opportunities? Search for other job offers that match your skills and interests.

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Job Posted:December 12, 2025

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