Microsoft Windows Infrastructure (L3)

Job Title: SME Microsoft Windows Infrastructure (L3)

Location: [Bengaluru, Karnataka]

Department: Managed Services

Position Overview

We are seeking a seasoned L3 Subject Matter Expert (SME) in Microsoft Windows

Administration to assist with engineering, maintenance, and high-level escalation support for our

enterprise Windows server infrastructure. In this role, you will act as a technical authority for complex

Windows OS issues, Active Directory management, virtualization.

You will work closely with security and network teams to ensure 99.99% uptime, implement robust

automation, drive security hardening, and mentor Tier 1 and Tier 2 support staff.

Key Responsibilities

Tier-3 Escalation & Deep Diagnostics

• Act as the final escalation point for critical (P1/P2) incidents involving Windows Server OS,

Active Directory, storage, and core infrastructure services.

• Perform root cause analysis (RCA) on recurring complex issues, system crashes, kernel

memory dump analysis, and performance bottlenecks.

• Lead disaster recovery (DR) planning, execution, and periodic failover testing across multi-

site environments.

Server Infrastructure & High Availability

• Manage enterprise Windows Server environments (Windows Server 2019, 2022).

• Design, implement, and maintain Failover Clustering, Storage Spaces Direct (S2D), and

VMware host environments.

• Optimize server performance, memory allocation, and storage performance across physical

and virtualized VMware platforms.

Automation, Scripting & Patching

• Build and maintain advanced PowerShell scripts and automation workflows for routine

maintenance, server provisioning, user management, and health checks.

• Oversee enterprise patch management strategies using MECM (SCCM), WSUS ensuring

high patch compliance across server fleets.

• Establish standard server baselines, automated image deployments, and configuration

management.

Security, Compliance & Hardening

• Implement standard security benchmarks (CIS, STIG) to harden Windows OS and Active

Directory.

• Partner with the Security Operations team to remediate vulnerability scan findings, manage

privileged access (PIM/PAM), and enforce RBAC principles.

Required Qualifications & Technical Skills

Experience

• 8+ years of hands-on experience managing complex, enterprise-scale Microsoft Windows

infrastructure environments.

• Proven track record in an L3 / SME capacity, handling high-severity escalations and root-

cause troubleshooting.

Technical Expertise

• Operating Systems: Windows Server 2012 R2 through Windows Server 2022 (Data Center /

Standard editions).

• Core Network Services: In-depth knowledge of DNS, DHCP, WINS, IPAM, NTP, and

Kerberos/NTLM authentication.

• Scripting: Advanced proficiency in PowerShell for administration, module development, and

automated monitoring.

• Management Tools: MECM/SCCM, Intune, System Center Operations Manager (SCOM), or

modern monitoring platforms (e.g., Opsramp, Splunk etc).

• Virtualization & Storage: VMware vSphere, SAN/NAS integration, and RAID configurations.

Soft Skills

• Strong analytical and problem-solving mindset under high-pressure scenarios.

• Excellent technical documentation skills (creating SOPs, RCA documents, and architectural

diagrams).

• Demonstrated ability to mentor junior/intermediate engineers and lead technical projects.