Sr Advanced Systems Administrator - AD Expert

Responsibilities

• Administer and support enterprise Microsoft Active Directory across multiple domains and forests
• Manage Domain Controllers, DNS, Sites & Services, FSMO roles, and trust relationships
• Monitor AD health, replication, and authentication, performing L3 troubleshooting and root cause analysis
• Plan and execute Active Directory upgrades, migrations, domain consolidations, and disaster recovery
• Administer Microsoft Entra ID (Azure AD) and Azure AD Connect in a hybrid identity environment
• Manage Enterprise Applications, Single Sign-On (SSO), SAML, OAuth, and OpenID Connect integrations
• Implement and maintain Multi-Factor Authentication (MFA), Conditional Access Policies, and Zero Trust security controls
• Design, implement, and troubleshoot Group Policy Objects (GPOs) and security baselines
• Develop and maintain advanced PowerShell scripts and automation solutions for IAM operations

Requirements

• 8–10 years of hands-on experience in Microsoft Active Directory administration (Windows Server 2016/2019/2022)
• Strong expertise in Microsoft Entra ID (Azure AD) and Azure AD Connect
• Experience managing Domain Controllers, AD replication, DNS, DHCP, Kerberos, LDAP, and Group Policy
• Proven experience handling L2/L3 support and root cause analysis in enterprise environments
• Strong knowledge of Identity & Access Management (IAM), MFA, Conditional Access, RBAC, and SSO technologies
• Advanced PowerShell scripting skills, including experience with Microsoft Graph PowerShell modules
• Experience administering Microsoft 365 licensing and hybrid identity environments

Preferred Qualifications

• Experience with Privileged Identity Management (PIM) and Identity Governance
• Familiarity with Microsoft Graph API and automation frameworks
• Experience with enterprise Active Directory migrations and domain consolidation projects
• ITIL process knowledge and experience working in large enterprise or managed services environments

About the Company

Resideo is a $6.76 billion global manufacturer, developer, and distributor of technology-driven sensing and control solutions that help homeowners and businesses stay connected and in control of their comfort, security, energy use, and smart living. Our products are found in more than 150 million residential and commercial spaces worldwide.