Led M365/Azure AD/Defender delivery; improved incident resolution by 30%. Automated workflows with PowerApps & PowerShell saving ~15 hrs/week. Trained teams, built runbooks & KB articles.

Sr. O365 Administrator at Tata Consultancy Services (TCS)

April 1, 2024 - September 10, 2025

Migrated 20,000+ mailboxes to Exchange Online with 99.9% success. Implemented ProofPoint security reducing phishing incidents by 40%. Supported compliance & eDiscovery across M365 tenant.

Sr. O365 Administrator (TCS Project) at Six Sigma Soft Solutions

September 1, 2022 - September 10, 2025

Managed Intune device policies & Exchange CU/SU upgrades. Delivered PowerShell automation for mailbox & policy management.

Windows Administrator at Cethar Foods Ltd.

September 1, 2021 - September 10, 2025

Managed Windows servers, Exchange on-prem, storage & DR solutions.

Sr. Office365 Administrator at M/s. Tata Consultancy Services

September 14, 2022 - Present

Architect and lead Exchange Online, mail flow, and directory synchronization for a large Office 365 user base; provides 24x7 global support across remote locations; manages mailbox migrations, shared and dynamic DLs, and license provisioning. Administers SharePoint Online, OneDrive, Teams, and Power Platform; implements security and compliance measures (ATP, DKIM, SPF, DNS). Monitors service health and coordinates with Help Desk; prepares weekly/monthly dashboards; documents KB articles and runbooks; participates in P1/P2 incident resolution as SME; supports on-premises Exchange CU/SU operations and hybrid configurations; handles DNS and AAD sync issues and room mailbox management.

Sr. Office365 Administrator at M/s. Six Sigma Soft Solutions (TCS)

September 13, 2022 - September 10, 2025

Supports and implements O365/M365 services, including Exchange Online, mail flow, and directory synchronization for the team; performs mailbox migrations, shared/dynamic DL management, and license provisioning. Provides content management for SharePoint Online and OneDrive; maintains security/compliance; provides 24x7 on-call support for remote sites; produces weekly/monthly reports; maintains SOPs/KBs; collaborates with ServiceNow for incidents/requests; supports hybrid environments and knowledge transfer to new team members.

Windows Administrator at Cethar Foods Limited - Trichy

September 30, 2021 - September 10, 2025

Windows Server patching and maintenance; on-premises Exchange related tasks; participated in mailbox migration activities; hybrid environment management; server decommissioning; security updates and incident resolution; daily IT infrastructure operations and on-site support.