Principal Infrastructure Engineer (L3 Support) Full Time NEW

Exp : 12+ yrs

Location : Bangalore

Notice Period: Immediate to max 15 days

Shift : There might be rotational shift .

Must Haves

• Git experience (Branches, Pull Requests) – GitHub preferred
• Infrastructure as Code – Terraform preferred
• Scripting – PowerShell preferred
• Cloud Engineering – Azure preferred
• Scripting experience – Python preferred
• Strong communication skills

Nice To Haves

Entra/Intune experience

CI/CD pipelines (Jenkins or Azure DevOps or other)

Docker (Docker files, docker commands)

Role Overview

Job Description – L3 Microsoft 365 / Azure Administrator

The L3 Microsoft 365 / Azure Administrator is a senior technical role responsible for designing, implementing, and supporting Microsoft 365, Azure, and endpoint management platforms. This role acts as the highest level of escalation for complex issues, leads cloud modernization initiatives, and ensures security, availability, and observability across the tenant.

The role requires strong hands-on expertise, architectural thinking, and the ability to guide L1/L2 teams while working closely with security, networking, and business stakeholders.

Key Responsibilities

Microsoft 365 Administration

• Administer and optimize Microsoft 365 services including:
• Exchange Online
• SharePoint Online
• OneDrive for Business
• Microsoft Teams
• Manage tenant-wide configurations, service health, message center updates, and feature rollouts
• Perform tenant health checks and remediation activities
• Handle complex service outages and cross-workload dependencies
• Implement governance, retention, compliance, and lifecycle management policies

Microsoft Intune / Endpoint Management

• Design and manage endpoint management using Microsoft Intune
• Configure and maintain:
• Device enrollment (Windows, iOS, Android, macOS)
• Compliance policies
• Configuration profiles
• Application deployment and update rings
• Troubleshoot advanced device, policy, and conditional access issues
• Integrate Intune with Microsoft Defender for Endpoint and Entra ID (Azure AD)

Azure Administration

• Administer Azure resources including:
• Virtual Machines
• Virtual Networks
• Storage Accounts
• Azure Monitor and Log Analytics
• Manage identity and access using Microsoft Entra ID
• Implement role-based access control (RBAC)
• Support hybrid and cloud-native architectures
• Perform cost optimization, capacity planning, and availability improvements

Infrastructure as Code (IaC)

• Design and implement infrastructure using IaC principles
• Author and maintain templates using:
• ARM Templates
• Bicep
• Terraform (preferred)
• Enable repeatable, version-controlled, and auditable deployments
• Integrate IaC with CI/CD pipelines (Azure DevOps / GitHub Actions)
• Enforce standards, naming conventions, and policy-as-code

Data Migration (File Server to SharePoint Online)

• Plan and execute file server to SharePoint Online migrations
• Assess data structure, permissions, and business requirements
• Use Microsoft migration tools or third-party solutions
• Optimize information architecture (sites, libraries, metadata)
• Ensure data integrity, performance, and minimal business disruption
• Support post-migration validation and user adoption

Zero Trust & Modern Networking

• Implement Zero Trust principles across identity, devices, and applications
• Support transition from VPN-centric models to:
• Direct Internet Access (DIA)
• Identity-based access controls
• Design and maintain:
• Conditional Access policies
• MFA enforcement
• Device trust models
• Collaborate with security and network teams to align with Zero Trust architecture

Observability & Tenant Health

• Monitor service health and performance across:
• Microsoft 365
• Azure
• Intune
• Leverage tools such as:
• Azure Monitor
• Log Analytics
• Microsoft 365 Admin Center reports
• Perform proactive tenant health checks
• Define alerts, dashboards, and KPIs
• Conduct root cause analysis (RCA) and preventive actions
• Provide actionable insights to improve stability and user experience

Operational & Leadership Responsibilities

• Act as L3 escalation point for complex technical issues
• Provide guidance and mentoring to L1/L2 support teams
• Create and maintain technical documentation, SOPs, and runbooks
• Participate in change management, CAB reviews, and major incident calls
• Work with vendors and Microsoft support for critical issues
• Contribute to cloud modernization and security improvement initiatives

Required Skills & Experience

• 6+ years of experience in Microsoft enterprise environments
• Strong expertise in Microsoft 365, Intune, and Azure
• Hands-on experience with IaC tools (Terraform / ARM / Bicep)
• Proven experience in SharePoint Online migrations
• Solid understanding of Zero Trust security principles
• Advanced troubleshooting and problem-solving skills
• Experience with monitoring, observability, and tenant health checks