Security-Focused Systems Administrator Microsoft 365

The Siegel Group; Las Vegas (NV); On-site; USD 70,000 - 100,000; Full time

Job summary

The Siegel Group is seeking a Systems Administrator to manage and secure our Microsoft 365 environment, identity services, and endpoint framework across a multi-brand hospitality and residential portfolio.

You will implement and monitor security controls, automate routine tasks with PowerShell, and collaborate with IT and vendor teams to maintain reliable infrastructure. After-hours support may be required.

Qualifications

• 2–3 years of systems administration, infrastructure or IT engineering experience.
• Experience administering Microsoft 365 including Exchange Online, SharePoint and Teams.
• Experience with Microsoft Entra ID: Conditional Access, MFA, lifecycle management, RBAC.
• Experience deploying and supporting Microsoft Intune and Windows Autopilot.
• Experience with Purview Data Loss Prevention (DLP) solutions.
• Experience administering next‑gen firewalls (Fortinet FortiGate/FortiManager/FortiCloud).
• Experience with EDR platforms and SIEM solutions.
• Strong TCP/IP, DNS, DHCP, VLANs, VPNs and enterprise networking knowledge.
• PowerShell scripting and automation experience.
• Certifications such as MS-102, AZ-104, SC-300 are a plus.

Responsibilities

• Administer and support the Microsoft 365 environment (Exchange Online, SharePoint, Teams).
• Manage Microsoft Entra ID: lifecycle, access controls, and licensing.
• Configure DLP policies across 365 services and endpoints.
• Deploy and support Intune and Windows Autopilot.
• Maintain endpoint security with EDR and SIEM integration.
• Administer Fortinet firewalls, VPNs, and network segmentation.
• Support vulnerability remediation and incident response activities.
• Create scripts, runbooks, and technical docs; maintain asset inventory and CM records.
• Mentor teammates and participate in after-hours support and maintenance.

Skills

Microsoft 365 Admin

Entra ID / Identity

PowerShell scripting

EDR / security tooling

SIEM administration

Fortinet FortiGate

Networking fundamentals

Exchange Online

DNS / DHCP / TCP/IP

Incident response

Education

Associate's or Bachelor's degree in IT / CS / Cybersecurity or related field

Tools

Microsoft Intune

Windows Autopilot

Microsoft Purview DLP

Fortinet FortiGate

FortiManager

FortiCloud

Exchange Online

Microsoft 365 Defender/EDR

Azure / Entra portal

PowerShell scripting tools

Job description

The Siegel Group is seeking a Systems Administrator to manage and secure our Microsoft 365 environment, identity services, and endpoint framework across a multi-brand hospitality and residential portfolio.

You will implement and monitor security controls, automate routine tasks with PowerShell, and collaborate with IT and vendor teams to maintain reliable infrastructure. After-hours support may be required.