Information Technology Infrastructure Specialist - Windows OS

Technology Stack:  Site Infrastructure Management and Operations

Experience:

5 to 10 Years

Employment Type:

Full-Time

Location:

Chennai(On-site)
Industry:  Healthcare

Role Overview :

The Site Reliability Engineer / Systems Administrator will be responsible for managing, automating, and optimizing enterprise infrastructure across on-premises and cloud environments. The role blends traditional systems and network administration with Site Reliability Engineering and Dev Ops practices, supporting global customer engagements delivered from India-based IT services and GCC environments.

Key Responsibilities
Endpoint, Network & Infrastructure Management
Manage and support Windows desktops, laptops, servers, and mobile/tablet devices
Administer endpoint security, patching, configuration baselines, and device compliance
Manage network devices including routers, switches, firewalls, and VPNs
Operate and maintain wireless infrastructure (WAPs, controllers, authentication)
Monitor and troubleshoot LAN, WAN, and internet connectivity issues

Identity & Enterprise Authentication Frameworks
Administer and support hybrid identity environments, including On-Prem Active Directory, Azure AD (Entra ), and Azure AD Connect, ensuring reliable user synchronization and access.
Manage and troubleshoot authentication and access, including SAML/SSO integrations, identity attributes (UPN, SMTP, Immutable

ID), and sign-in issues across enterprise applications.
Execute and maintain Power Shell automation for bulk identity, Exchange Online, and Microsoft 365 tenant operations with proper validation, logging, and rollback awareness.
Administer Microsoft 365 and Exchange Online, including tenant configuration, mail flow, shared mailboxes, aliases, and identity-related email settings.
Perform and validate DNS configurations (SPF, DKIM, DMARC and related records) and resolve email, authentication, and access issues during migrations and steady-state operations.

Cloud & Platform Operations
Provision, manage, and optimize cloud infrastructure resources (compute, storage, networking)
Ensure secure access, identity controls, and least-privilege configurations
Monitor cloud costs, capacity, and performance trends

Reliability Engineering & Availability
Define, implement, and continuously improve SLIs, SLOs, and SLAs
Ensure high availability, fault tolerance, and resilience across systems
Design and test business continuity and disaster recovery strategies
Conduct regular failover, backup restore, and resilience testing

Backup, Recovery & Data Protection
Define and manage backup and recovery policies for endpoints, servers, and cloud workloads
Ensure backups meet RPO/RTO objectives and compliance requirements
Periodically validate backup integrity and recovery readiness

Observability & Monitoring
Implement and enhance logging, monitoring, and alerting across infrastructure and applications
Reduce alert fatigue through intelligent thresholds and actionable alerts
Use observability data to drive proactive reliability improvements

Incident & Problem Management
Define and manage incidents following ITIL/SRE best practices
Act as incident responder and coordinator during outages and degradations
Perform root cause analysis (RCA) and document post-incident reviews
Drive permanent fixes and reliability improvements from incident learnings

Operational Excellence & Documentation
Create, maintain, and improve operational documentation, runbooks, and SOPs
Standardize operational procedures to reduce risk and human error
Support audits, compliance reviews, and internal controls through accurate documentation
Collaborate with security, engineering, and business teams on operational readiness

Required

Skills & Qualifications

Technical Skills
Strong hands-on experience with Windows OS administration (desktop & server)
Strong hands-on expertise in hybrid identity platforms, including On-Prem Active Directory, Azure AD (Entra ), and Azure AD Connect, with a clear understanding of synchronization and identity consistency.
Proven ability to automate and operate at scale using Power Shell, including bulk identity updates, Microsoft 365 administration, and safe execution of high-impact changes.
Deep…