Senior System Administrator L3
23 hours ago
Job Title: System Administrator Level 3
Location: Mumbai, Thane, India
Job Type: Full-Time
Shift: 24x7 Operations Support
Department: NOC, SOC, and Help Desk
Job Summary:
Position OverviewWe are seeking a highly skilled Level 3 (L3) Windows System Administrator with strong expertise in Microsoft 365, Azure, SharePoint, Power BI, and workflow automation . The ideal candidate will be responsible for advanced system administration, troubleshooting, migrations, and automation while ensuring a secure, reliable, and scalable IT infrastructure. This role requires deep technical knowledge, hands-on experience, and the ability to mentor junior team members.
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.
- 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).
- 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.
- 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.
- 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.).
- 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.
- 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.
- 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 .
- Strong communication and documentation skills.
- Ability to work independently and as part of a global IT team.
- Leadership qualities to mentor and guide junior staff.
- Customer-focused mindset with a commitment to service excellence.
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