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Senior System Administrator specializing in Microsoft 365, Active Directory, AWS, and enterprise infrastructure reliability. For the past 4 years, I've been the sole infrastructure consultant supporting production systems for Revalize LLC (USA), managing customer-facing enterprise environments where downtime directly impacts revenue. Alongside this long-term enterprise infrastructure ownership, I've delivered migration and remediation projects for 20+ organizations across SaaS, manufacturing, and professional services. Core expertise: - Microsoft 365 migrations & hybrid Exchange - Active Directory & Windows Server administration - AWS cost optimization & infrastructure reliability - PowerShell automation & process optimization - Disaster recovery & business continuity Clients typically bring me in when: → Migration projects have stalled or lack expertise → Active Directory or mail infrastructure becomes unstable → Production environments lack documentation or monitoring → Infrastructure costs are growing unexpectedly → Internal teams cannot safely troubleshoot production systems Recent project outcomes: → Migrated 500+ users from Exchange 2016 to Microsoft 365 with zero email downtime during 72-hour cutover → Reduced AWS infrastructure costs by 30% ($47K annually) through EC2 rightsizing and Reserved Instance strategy → Restored multi-site Active Directory replication affecting 450+ users across 3 locations within 8 hours → Recovered a non-booting domain controller with SYSVOL/DFSR failures in 6 hours, preventing an authentication outage → Automated user onboarding workflows, reducing provisioning time from 2 hours to 10 minutes Microsoft 365 & Exchange - Exchange Online & hybrid Exchange migrations - Tenant-to-tenant migrations - Hybrid identity (Entra ID / Azure AD) - SharePoint & Teams administration - SPF / DKIM / DMARC configuration - Intune device management & endpoint compliance policies - MFA enforcement, Conditional Access, and Microsoft 365 governance - Exchange sync troubleshooting & mailbox recovery Active Directory & Windows Infrastructure - Domain controller recovery & SYSVOL/DFSR replication repair - Multi-site domain controller deployments - Group Policy management & troubleshooting - FSMO role management & transfer - Hybrid AD environments (on-premises + Entra ID) - Windows Server 2012 R2 through 2022 administration AWS & Cloud Infrastructure - Cost optimization & infrastructure analysis (40-60% average reduction) - EC2 rightsizing & Reserved Instance strategy - RDS performance tuning & elastic pool optimization - CloudWatch monitoring & proactive alerting - VPC design & auto-scaling configuration Infrastructure Reliability & Operations - Disaster recovery planning & backup validation - Production change management & operational handoff - 24/7 emergency support for production infrastructure incidents - Flexible timezone coverage (US, UK, Australian business hours) Additional experience includes VMware vSphere, Hyper-V, Fortinet/pfSense networking, Veeam/Commvault backup solutions, and enterprise ITSM platforms including ServiceNow and JIRA. Certifications: → AWS Certified Solutions Architect – Associate → Microsoft 365 Certified: Fundamentals (2024) → MCSA: Windows Server 2016 → Fortinet NSE 1 & NSE 2 Network Security Clients value reliability, communication, and operational accountability just as much as technical execution. If you need an experienced infrastructure engineer to stabilize, migrate, optimize, or maintain production systems, send me: → Current infrastructure overview (platform, user count, pain points) → Project goals and timeline → Any existing documentation or error logs I respond within 24 hours with a project assessment and approach. Available for scheduled migrations, infrastructure remediation, and urgent production recovery engagements.

Passionate IT Professional | Cloud Architect | Microsoft Purview Architect | Microsoft 365 & Cloud Security Architect | Helping Businesses Secure, Streamline & Scale 🚀 Empowering Businesses with Secure, Efficient Microsoft 365 Solutions Hello, I’m Kesavan a Microsoft 365 & Cloud Security Specialist with over 3 years of IT experience. I’ve helped 50+ global businesses, including MSPs and enterprises, to secure, migrate, and modernize their Microsoft 365 environments delivering real results with simplicity and reliability. I specialize in helping organizations enhance security, stay compliant, improve productivity, and reduce IT costs without the complexity. 💼 What I Do ✅ Microsoft 365 Cloud Migrations & Administration * Full Microsoft 365 tenant setup, configuration, and management * Seamless migrations from on-premises, Google Workspace, GoDaddy, Zoho, and others * Email, file, and Teams data migration (Exchange Online, OneDrive, SharePoint, Teams) * Subscription, license, and cost optimization ✅ Modern Endpoint Management with Microsoft Intune * Zero-touch provisioning withnWindows Autopilot * Mobile Device & Application Management (MDM/MAM) * Device compliance, BitLocker, Defender, and policy enforcement for Windows/macOS/iOS/Android ✅ Security, Identity & Compliance * Entra ID (Azure AD): Identity management, MFA, Conditional Access, and PIM * Microsoft Purview: Data protection, sensitivity labels, DLP, compliance policies *Microsoft Defender: Email protection, endpoint security, and threat detection * Security audits, risk mitigation, and best-practice implementations ✅ Ongoing IT Support & Expert Consulting * Tier 2/3 support for Microsoft 365, Exchange Online, Teams, SharePoint, and more. * Troubleshooting and optimization for performance, access, or security issues. 🏆 Why Clients Choose Me ✔ 3+ years of hands-on Microsoft cloud expertise. ✔ Trusted by 50+ global clients, including MSPs and enterprise teams. ✔ Consistently rated 5 stars on Upwork with a 100% job success score. ✔ Microsoft Certified across security, compliance, Teams and administration. ✔ Clear communicator, quick responder, and results-focused partner. 🎓 Certifications That Support Your Success * MS-102 – Microsoft 365 Certified: Administrator Expert * MS-900 – Microsoft 365 Certified: Fundamentals * SC-300 – Microsoft Certified: Identity and Access Administrator Associate * SC-400 – Microsoft Certified: Information Protection Administrator Associate * MS-700 – Microsoft Teams Administrator Associate 💡 Let’s Work Together If you're looking to simplify your Microsoft 365 management, improve security, or ensure compliance I'm here to help. 📩 Reach out and let’s discuss how I can support your business success with secure, smart, and streamlined Microsoft 365 solutions.

As a seasoned IT professional with over a decade of experience, I specialize in managing and supporting Microsoft 365, Azure environments, server infrastructures, and user end support. My strengths lie in my ability to design, implement, and maintain complex IT systems, ensuring seamless operations and business continuity. I am proficient in PowerShell scripting, Active Directory, Group Policy, Intune, SCCM, and various backup solutions like Veeam and StorageCraft. I've successfully handled numerous projects involving server migrations, cloud deployments, and user onboarding/offboarding processes, making sure to align technology with business needs. My educational background includes a Bachelor of Science in Computer Networks, supplemented by industry-recognized certifications in Azure, Microsoft, and ITIL®. I am committed to delivering high-quality solutions and exceptional support, ensuring that every client's technical needs are met with precision and efficiency. Let’s work together to bring your IT projects to life!

Experienced consultant with a demonstrated history of working in the information technology for more than 16 years. I am skilled in Microsoft core products such as Active Directory, Exchange, Office 365, Windows Server, Azure, Intune etc. Technical expertise: Office 365 Microsoft Exchange 2007/ 2010 / 2013 / 2016 / 2019 Azure Virtual Desktop (AVD) Microsoft Windows Server 2008/ 2012/ 2016/ 2019 Exchange Online Exchange Hybrid Azure IaaS Azure AD Join, Azure AD Hybrid Join Active Directory deployment/ migration Azure Active Directory Azure AD Connect Intune, Intune Autopilot DNS, DHCP, Group Policy, SMTP, SPF, DKIM Email migration, Bittitan MigrationWiz OneDrive for Business SharePoint Online Administration Certifications: Microsoft Certified: Azure Virtual Desktop Specialty Microsoft Certified: Identity and Access Administrator Associate Microsoft Certified: Azure Administrator Associate Microsoft Certified Solutions Expert: Productivity Microsoft 365 Certified: Messaging Administrator Associate Microsoft Certified Solutions Associate: Office 365 Microsoft Certified Solutions Associate: Windows Server 2008 Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Professional