Windows System Administrator L3

Key Responsibilities

Windows & Infrastructure Administration

• Manage, configure, and troubleshoot Windows Server environments (AD, DNS, DHCP, Group Policy, File/Print services).
• Maintain virtualized environments (Hyper-V, VMware, or Azure Virtual Desktop).
• Perform patch management, upgrades, and system performance optimization.
• Implement backup, disaster recovery, and high-availability strategies.

Microsoft 365 & Azure Administration

• Administer O365 tenant services including Exchange Online, Teams, OneDrive, and SharePoint Online.
• Manage Azure AD, Conditional Access Policies, Security & Compliance Center.
• Configure and maintain Intune MDM/MAM for endpoint security and compliance.
• Support hybrid environments (on-premises AD + Azure AD Connect).

SharePoint & Power Platform

• Administer and support SharePoint Online/On-Prem, including site collections, permissions, and workflows.
• Design, implement, and maintain Power Automate (Flow) solutions for business process automation.
• Develop Power BI dashboards and reports integrating data from multiple sources.
• Collaborate with business stakeholders to optimize collaboration and reporting platforms.

Migration Projects

• Lead and execute migrations to O365, SharePoint Online, and Azure.
• Perform email and data migrations (Exchange, PST, file shares, SharePoint, legacy systems).
• Ensure minimal downtime and data integrity during migration processes.

Security & Compliance

• Implement identity and access management (IAM) best practices.
• Monitor and respond to security alerts and incidents across O365/Azure.
• Ensure compliance with regulatory standards (ISO, SOC2, HIPAA, etc.).

Support & Mentorship

• Provide L3 support for escalated incidents and problem management.
• Create documentation, SOPs, and runbooks for IT operations.
• Mentor and guide L1/L2 engineers in troubleshooting and best practices.

Required Skills & Experience

• 7+ years of experience in Windows Server administration.
• 5+ years of hands-on experience with Microsoft 365 & Azure Administration.
• Strong knowledge of Active Directory, Group Policy, DNS, DHCP.
• Expertise in SharePoint Online/On-Prem, Power BI, and Power Automate.
• Proven track record in O365 / Exchange Online migrations and SharePoint migrations.
• Experience with Intune, Endpoint Manager, and security tools.
• Solid understanding of networking fundamentals (TCP/IP, VPN, firewalls, load balancers).
• Strong scripting skills in PowerShell for automation and administration.
• Excellent troubleshooting, analytical, and problem-solving abilities.

Preferred Qualifications

• Microsoft certifications (MCSE, MS-100, MS-101, AZ-104, AZ-305, etc.).
• Experience with hybrid cloud environments.
• Familiarity with third-party migration tools (Quest, BitTitan, ShareGate, etc.).
• Knowledge of SIEM, SOC monitoring, and advanced security tools.