Rajeev Kumar

I’m a Senior Systems Administrator with 11+ years of hands-on experience designing, securing, and supporting Microsoft 365, Exchange Online, Azure AD, and hybrid environments. I’ve built a strong reputation for improving availability while strengthening security posture and regulatory compliance for global clients.

I implement security and compliance controls across Microsoft 365 using Defender for Office 365, Purview, DLP, eDiscovery, audit logs, and the Microsoft Compliance Center. I focus on practical outcomes—better protection against phishing, data leaks, and advanced threats, backed by reliable reporting for audits and investigations.

I also own the operational side of hybrid infrastructure at scale, protecting 300+ servers and 2200+ endpoints. From Exchange Online message tracing and mail flow/transport rules to quarantine management and email hygiene, I ensure secure, reliable communication while resolving complex incidents in a 24/7 managed services environment.

Throughout my career, I’ve delivered migrations and recovery support that keep businesses moving. I’ve migrated shared folders to SharePoint Online and Azure Files, set up Azure Active Directory Domain Services, performed Hyper-V to VMware vSphere migrations, and restored critical compromised data using backup and DR tools—often with minimal disruption.