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Rehan Khan

@rehankhan10

Advanced System Administrator at IT BY DESIGN who maintains 99.9% uptime and developed PowerShell tools for Microsoft 365 backup across 200+ tenants.

India

Message

At IT BY DESIGN, I administer Windows Server, Active Directory, Microsoft 365 and Entra ID across 50+ multi-client environments at 99.9% uptime. I’m the subject matter expert for Spanning Microsoft 365 backup across 200+ organizations, investigating failures and validating restores.

I develop PowerShell tooling for backup coverage, SharePoint diagnostics and Windows infrastructure health, using Microsoft Graph and related APIs. At CONCENTRIX, I delivered Microsoft Premier support for Windows Server and Active Directory, resolving complex identity and replication issues.

Experience

Work history, roles, and key accomplishments

Current

Advanced System Administrator

Current

IT BY DESIGN

Jul 2023 - Present (3 years 3 months)

Administer 50+ multi-client MSP environments spanning Windows Server, Active Directory, Microsoft 365 and Entra ID at 99.9% uptime. Serve as subject matter expert for Spanning Microsoft 365 backup across 200+ organizations and develop internal PowerShell tooling for backup investigation and diagnostics.

Subject Matter Expert (Microsoft EPS, Windows Premier)

Concentrix

Oct 2021 - Jun 2023 (1 year 8 months)

Delivered enterprise-tier support for Microsoft Premier clients across Windows Server and Active Directory Domain Services. Resolved complex Active Directory issues, remediated Kerberos and NTLM authentication failures, and administered Group Policy across 5000+ users.

Windows Server Active Directory DNS Kerberos Windows NTLM ADCS PKI Group Policy DFSR SYSVOL Process Monitor Network Monitoring Windows Event Viewer

Customer Support Analyst

Teleperformance Global Pvt. Ltd.

Sep 2020 - Oct 2021 (1 year 1 month)

Handled 150+ daily customer queries for Walmart Canada across voice and chat channels, maintaining a 98% first-contact resolution rate. Managed escalations and supervisor desk responsibilities, consistently exceeding performance targets by 10%.

Customer Support Voice support Live Chat Escalation Management First Contact Resolutions