Sr Systems Administrator

Contract to Hire Hybrid (onsite 3 days/week) Location: Irving, TX Seeking a senior Systems Administrator to own day-to-day administration and optimization of our Microsoft 365 environment, endpoint management via Intune, and on-premises/hybrid Active Directory infrastructure. This is a hands-on role for someone comfortable working independently, troubleshooting complex identity and endpoint issues, and driving improvements across our M365 and directory services stack. Key Responsibilities Administer and support the full Microsoft 365 suite (Exchange Online, SharePoint Online, Teams, OneDrive, Entra ID) including licensing, security policies, and service health monitoring. Manage endpoint configuration, compliance policies, app deployment, and device lifecycle through Microsoft Intune (MDM/MAM) across Windows, and mobile platforms. Administer on-premises Active Directory and hybrid identity (Entra Connect/AD Connect), including OU structure, GPOs, replication health, and directory synchronization. Manage user and device lifecycle: onboarding/offboarding, access provisioning, security group management, and conditional access policies. Troubleshoot and resolve escalated tickets related to identity, authentication, endpoint compliance, and M365 service issues. Support Microsoft 365 security posture: MFA, conditional access, Defender for Endpoint/Office 365, and Purview/compliance configurations. Maintain documentation for configurations, standard operating procedures, and change management records. Partner with IT leadership on infrastructure projects, including migrations, upgrades, and security hardening initiatives. Participate in on-call rotation and respond to after-hours incidents as needed. Required Qualifications 5-8 years of hands-on systems administration experience in an enterprise environment. Advanced, hands-on experience with Microsoft 365 administration (Exchange Online, SharePoint, Teams, Entra ID). Deep, hands-on expertise with Microsoft Intune for endpoint/device management and compliance. Expert-level knowledge of Active Directory administration (GPOs, OUs, replication, hybrid identity/AD Connect). Solid understanding of identity security concepts: conditional access, MFA, RBAC, and least-privilege principles. Experience with PowerShell scripting for administration and automation tasks, including the Microsoft Graph PowerShell SDK. Strong troubleshooting skills and ability to work independently on complex, ambiguous issues. Excellent written and verbal communication skills. Preferred Qualifications Relevant certifications such as Microsoft 365 Certified: Administrator Expert, Microsoft Certified: Identity and Access Administrator Associate, or Microsoft Certified: Endpoint Administrator Associate. Experience in a multi-site or manufacturing/industrial environment. Familiarity with Microsoft Defender suite and Purview compliance tools. Experience with Azure infrastructure administration. INDPIT