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Top Rated IT Infrastructure & Security Engineer with 700+ hours on Upwork and a 100% Job Success Score. I keep phone systems, firewalls, and servers running for small businesses and MSPs — so your team stays connected, protected, and productive. What I do: ✔ IT Support & Helpdesk — remote troubleshooting, ticket handling (Tier 1–3), user onboarding/offboarding, printer and endpoint issues, and ongoing support contracts for businesses and MSPs ✔ 3CX VoIP — new deployments, V18→V20 migrations, SIP trunk configuration (Twilio, Broadvoice), IVR, queues, DID routing, integrations, and troubleshooting ✔ FortiGate firewalls — SSL-VPN setup for remote teams, firewall policies, split tunneling, secure remote access, and web filtering ✔ VMware virtualization — ESXi and vCenter administration, VM provisioning, migrations (P2V/V2V), performance troubleshooting, and host maintenance ✔ Backup & disaster recovery — Veeam configuration, backup health checks, and restore testing for VMware environments ✔ Infrastructure & Information Security — network segmentation (VLANs), firewall hardening, VPN security, access control, MFA rollout, patch management, and security best practices to protect your business data ✔ Microsoft 365 & Intune — tenant administration, Exchange Online, device enrollment, and MDM policies ✔ Networking — network design & deployments, troubleshooting, and network optimization ✔ Server administration — Windows Server, RHEL/Linux, Active Directory, and day-to-day IT support How I work: I follow ITIL-aligned practices — structured incident and change management, proper documentation, and root-cause fixes instead of quick patches. Fast response times, clear documentation after every job, and plain-English updates — no jargon, no disappearing mid-project. I've handled everything from single urgent fixes to long-term support contracts, and my clients keep coming back because things get done right the first time. Let's talk: Message me with your issue — I'll tell you honestly whether I can fix it, how long it will take, and what it will cost. No overselling, no surprises.

✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

I am an experienced IT Infrastructure Engineer with 15+ years of hands-on expertise in designing, deploying, and managing enterprise IT environments. My specialization includes Windows Server, Active Directory, Hybrid AD with Entra ID, Microsoft 365, Exchange Server, Azure, AWS, and Virtualization. I help businesses modernize their IT infrastructure end-to-end — from on-premises servers and virtualization platforms (VMware/Hyper-V) to hybrid cloud integrations, Azure AD/Entra ID deployments, and modern desktop architecture. I focus on delivering secure, scalable, and resilient hybrid IT solutions that enhance productivity, security, and compliance while supporting business growth. Technical Expertise 🗄️ Windows Server & Active Directory ✅ Install, configure, and manage Windows Server 2003–2025 ✅ DFS, DNS, DHCP, RDS, IIS, RAID, NAS ✅ Group Policy Objects (GPOs), AD replication, backup & restore ✅ Active Directory migrations & consolidations (domains/forests) ✅ Identity Services: ADFS, Azure SSO, MFA, SAML, OAuth, OpenID ✅ AD Security Auditing: BloodHound/SharpHound, Kerberoasting, ZeroLogon ☁️ Microsoft 365 & Cloud Services ✅ Administration of Exchange Online, SharePoint, OneDrive, Teams ✅ Domain & DNS setup: SPF, DKIM, DMARC, MX ✅ Security & Compliance: Defender for Endpoint & O365, DLP, Conditional Access, Sensitivity Labels, Azure Security Policies ✅ Tenant-to-tenant migrations: BitTitan, CodeTwo, SkyKick ✅ Hybrid Deployments: Exchange + O365, ADFS, Azure AD/Entra ID Connect ✅ Modern Workplace Management: Intune, Autopilot, Co-management, Windows 10/11, Windows 365/Cloud PC 🏢 Virtualization & Cloud Platforms ✅ VMware: ESXi, vCenter, vMotion, DRS, HA, NSX, vSAN, vROps ✅ Hyper-V: deployment, migration, clustering, Azure Stack HCI ✅ Azure Virtual Machines | VM Scale Sets | Availability Sets & Zones | ARM Templates | NSGs | Azure Bastion | Load Balancer | Azure Monitor | Backup & Site Recovery | Automation & Auto-Scaling | Hybrid VM Integration | High Availability | Cost Optimization ✅ AWS: IAM, EC2, S3, CloudFormation, cloud migrations 🔒 Security & Vulnerability Management ✅ Penetration testing & vulnerability scanning (Nessus, Qualys, Kali Linux) ✅ Remediation of Windows & AD vulnerabilities (SMB, PrintNightmare, LDAP signing) ✅ Zero Trust Security implementation & Identity Governance ✅ Backup & disaster recovery (StorageCraft, NAS, SkyKick, Quest Recovery Manager, DRaaS) ⚡ Automation & RMM Tools ✅ PowerShell scripting & DSC automation ✅ Graph API & Microsoft 365 automation ✅ RMM tools: Intune, Datto RMM, ConnectWise, NinjaOne, ManageEngine ✅ Endpoint management, application deployment & compliance 📞 Collaboration & Messaging ✅ Teams Phone System & Direct Routing ✅ Exchange Hybrid Architecture & migrations ✅ PBX integration 🏆 Why Work With Me / Achievements / Key Results 🏅 Upwork Top-Rated Expert – recognized for delivering high-quality IT infrastructure and cloud solutions 🏅 Certified IT Infrastructure Expert – Microsoft, Azure, AWS, VMware, and Security certifications 🏅 23K+ hours worked – extensive hands-on experience with diverse enterprise projects 🏅 $400K+ earned – proven track record of client satisfaction and successful project delivery 🏅 Enterprise & Cloud Expertise – implemented hybrid AD, Azure, Microsoft 365, VMware, and AWS solutions for multiple organizations 💡 Online Consultation Available ⭐ Review your IT environment ⭐ Identify challenges & solutions ⭐ Create a custom step-by-step action plan 📅 Schedule your consultation directly on Upwork at your convenience. Whether you need full project delivery or expert guidance, I ensure your IT infrastructure is secure, efficient, and optimized for growth.

With over 15 years of extensive experience in the IT infrastructure domain, I am a Top Rated Plus Freelancer on Upwork, celebrated for delivering excellence across more than 100 projects globally. My expertise encompasses a broad spectrum of technologies, including cloud platforms such as Azure, GCP, and AWS, as well as mastery in Office 365 and Google Workspace, ensuring enhanced collaboration and operational efficiency. Throughout my career, I have excelled in roles such as CTO and Senior Infrastructure Engineer, showcasing a harmonious blend of strategic leadership and deep technical expertise. My portfolio includes sophisticated projects in Windows Server management, virtualization with VMware ESXi and Hyper-V, and implementing comprehensive backup solutions with Veeam Backup & Replication. I specialize in executing seamless migrations to cloud services, optimizing IT ecosystems for peak performance, and developing robust disaster recovery plans that guarantee business continuity. My commitment to operational excellence and compliance is evident in my successful leadership of SOC2 and HIPAA compliance initiatives. Armed with a Master’s degree in Computer Science and fluent English proficiency, I am prepared to confront and solve complex IT challenges, providing scalable, secure, and innovative solutions. I am dedicated to leveraging my extensive experience to contribute to the success of your next project, driving growth and technological advancement within your organization.

I'm a Microsoft Certified system administrator specializing in Microsoft Azure, Microsoft 365, Windows Server, and hybrid cloud solutions for small and medium-sized businesses. I build secure, reliable IT infrastructures that keep downtime low and operations running smoothly. My Azure work covers VM and network deployment (VNets, Load Balancers, NSGs, Storage Accounts), identity and access management with Microsoft Entra ID (RBAC, Conditional Access, MFA), and proactive monitoring via Azure Monitor and Log Analytics. I also handle backup and disaster recovery using Acronis, Veeam, and Azure Backup/Site Recovery. On Microsoft 365, I manage full tenant administration, Exchange Online, SharePoint/OneDrive, Teams, user/license provisioning, plus security hardening through Conditional Access, MFA, and Defender for Office 365, whether it's a fresh setup, an Exchange migration, or ongoing management. WHAT I OFFER: ✅ Microsoft Azure: Virtual Machines, Virtual Networks, hybrid integration, networking (Load Balancers, NSGs, Azure Firewall), Storage Accounts, FSLogix and Azure Virtual Desktop (AVD) ✅ Azure Identity & Security: Microsoft Entra ID (Azure AD), RBAC, Conditional Access, MFA, and Defender for Cloud ✅ Azure Monitoring: Azure Monitor, Log Analytics, and Application Insights for proactive issue detection ✅ Windows Server (2016–2025): installation, configuration, and administration ✅ Active Directory & Hybrid AD: user management, group policies, Azure AD Connect/sync, and security hardening ✅ Virtualization (Hyper-V/VMware): setup, migration, and optimization of virtual environments ✅ Backup & Disaster Recovery: Acronis, Veeam, and Azure Backup/Site Recovery configuration, monitoring, and testing ✅ Microsoft 365 Administration: tenant setup and management, Exchange Online, SharePoint & OneDrive, Teams, user provisioning and licensing ✅ Microsoft 365 Security: Conditional Access, MFA, Defender for Office 365, and compliance basics ✅ Storage & RAID Configuration: SAN, NAS, and storage health monitoring ✅ Security Hardening & Patch Management: OS, firmware, and software updates ✅ Network Support: DrayTek router setup, VPN configuration, and troubleshooting ✅ Remote IT & Server Support: fast issue resolution and proactive monitoring CERTIFICATIONS: 🎯 Microsoft Certified: Azure Administrator Associate 🎯 Microsoft Certified: Microsoft 365 Administrator 🎯 Microsoft Certified: Azure AI Engineer Associate 🎯 Microsoft Certified: Windows Server Hybrid Administrator Associate 🎯 HPE ProLiant & Blade Server Service and Solution Qualification WHY CHOOSE ME? 🔹 4+ years of professional experience in Microsoft Azure and Windows Server environments 🔹 Proven expertise across Azure infrastructure, Microsoft 365 administration, Active Directory, backup, and disaster recovery 🔹 Reliable, fast, and proactive problem-solving 🔹 Client-focused approach ensuring long-term IT stability and security I specialize in Azure hybrid solutions, Microsoft 365 management, IT support, Windows Server administration, virtualization, and backup management. Let's optimize and secure your on-prem and cloud IT infrastructure to ensure seamless operations for your business 🚀

𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 | 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 | 𝗨𝗞-𝗕𝗮𝘀𝗲𝗱 I help 𝗦𝗠𝗕𝘀, 𝗠𝗦𝗣𝘀, and growing businesses build, maintain, troubleshoot, and optimize reliable IT infrastructure. My expertise covers 𝗪𝗶𝗻𝗱𝗼𝘄𝘀 𝗦𝗲𝗿𝘃𝗲𝗿, 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗔𝗱𝗺𝗶𝗻𝗶𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻, 𝗗𝗲𝘃𝗢𝗽𝘀, 𝗥𝗲𝗺𝗼𝘁𝗲 𝗗𝗲𝘀𝗸𝘁𝗼𝗽 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 (𝗥𝗗𝗦), 𝗩𝗶𝗿𝘁𝘂𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹𝘀, 𝗕𝗮𝗰𝗸𝘂𝗽 & 𝗗𝗶𝘀𝗮𝘀𝘁𝗲𝗿 𝗥𝗲𝗰𝗼𝘃𝗲𝗿𝘆, and 𝗟𝗲𝘃𝗲𝗹 𝟮/𝟯 𝗠𝗦𝗣 𝗦𝘂𝗽𝗽𝗼𝗿𝘁. With 𝟱+ 𝘆𝗲𝗮𝗿𝘀 of professional infrastructure experience, 𝟰𝟯𝟳+ 𝗵𝗼𝘂𝗿𝘀 successfully delivered on Upwork, and experience supporting production environments across SMBs and MSPs, I focus on delivering secure, stable, and well-documented solutions that businesses can rely on. 𝗪𝗛𝗔𝗧 𝗜 𝗔𝗖𝗧𝗨𝗔𝗟𝗟𝗬 𝗚𝗘𝗧 𝗖𝗔𝗟𝗟𝗘𝗗 𝗜𝗡 𝗙𝗢𝗥 Most clients don't hire me to simply manage servers, they bring me in when something critical needs attention. A domain controller stops replicating. An RDS environment becomes unstable. Firewall rules break remote access. Backups fail silently. Virtual machines suffer performance issues. Infrastructure has been inherited with little or no documentation. My role is to quickly identify the root cause, stabilize the environment, implement best practices, and leave behind clear documentation so the infrastructure is easier to support going forward. 𝗦𝗬𝗦𝗧𝗘𝗠𝗦 𝗔𝗗𝗠𝗜𝗡𝗜𝗦𝗧𝗥𝗔𝗧𝗜𝗢𝗡 • Windows Server 2016 / 2019 / 2022 / 2025 • Active Directory, Group Policy, DNS, DHCP • Domain Controller Health & Replication • File & Print Services • Server Migration & Infrastructure Hardening 𝗡𝗘𝗧𝗪𝗢𝗥𝗞 𝗔𝗗𝗠𝗜𝗡𝗜𝗦𝗧𝗥𝗔𝗧𝗜𝗢𝗡 • Sophos, Fortinet, pfSense & Cisco ASA • VPN Configuration & Remote Access • VLANs, Routing & Switching (CCNA) • Firewall Rule Review • Network Performance & Security Troubleshooting 𝗗𝗘𝗩𝗢𝗣𝗦 𝗔𝗗𝗠𝗜𝗡𝗜𝗦𝗧𝗥𝗔𝗧𝗜𝗢𝗡 • PowerShell & Bash Scripting • Infrastructure Automation • CI/CD Administration • System Monitoring • Performance Optimization • Patch & Configuration Management 𝗥𝗘𝗠𝗢𝗧𝗘 𝗗𝗘𝗦𝗞𝗧𝗢𝗣 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦 (𝗥𝗗𝗦) • RDS Deployment & Migration • Remote Desktop Gateway • Session Host & Connection Broker • Secure Remote Access • Performance Optimization & Licensing 𝗩𝗜𝗥𝗧𝗨𝗔𝗟𝗜𝗭𝗔𝗧𝗜𝗢𝗡 & 𝗕𝗔𝗖𝗞𝗨𝗣 • VMware, Hyper-V & Proxmox • Veeam & Acronis Backup Solutions • Backup Validation & Restore Testing • Disaster Recovery Planning 𝗠𝗦𝗣 𝗜𝗧 𝗦𝗨𝗣𝗣𝗢𝗥𝗧 (𝗟𝗘𝗩𝗘𝗟 𝟮/𝟯) • Embedded MSP Escalation Support • Server & Network Troubleshooting • Infrastructure Support • Incident & Change Management • Documentation & SLA Compliance 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘 ✔ 𝟰𝟯𝟳+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗛𝗼𝘂𝗿𝘀 delivering infrastructure and MSP support. ✔ 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 with 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 status. ✔ 𝟯𝟭𝟰 𝗵𝗼𝘂𝗿𝘀 as an embedded Level 2/3 MSP Engineer, supporting live production environments with documented, SLA-driven support. ✔ Current 𝗜𝗧 & 𝗚𝗼𝘃𝗲𝗿𝗻𝗮𝗻𝗰𝗲 role within a regulated UK legal firm, where security, access control, documentation, and change management are everyday responsibilities. ✔ Strong background in enterprise networking before transitioning into systems administration, providing an end-to-end understanding of infrastructure. ✔ I don't just fix today's issue, I build environments that are secure, documented, and easier to manage tomorrow. 𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞 Every engagement starts with a short scoping discussion to understand the environment before recommending a solution. You'll receive clear communication throughout the project, practical recommendations, and complete documentation of everything implemented. If something falls outside my expertise, I'll tell you upfront rather than waste your time or budget. I'm 𝗨𝗞-𝗯𝗮𝘀𝗲𝗱, available during 𝗨𝗞 business hours, and also cover 𝗨𝗦 𝗘𝗮𝘀𝘁𝗲𝗿𝗻 and 𝗖𝗲𝗻𝘁𝗿𝗮𝗹 mornings. 𝗚𝗢𝗢𝗗 𝗙𝗜𝗧 𝗜𝗙 𝗬𝗢𝗨 𝗡𝗘𝗘𝗗 ✔ Windows Server Administration ✔ Network Administration ✔ DevOps & Infrastructure Automation ✔ Remote Desktop Services (RDS) ✔ VMware, Hyper-V & Proxmox ✔ Firewall & VPN Configuration ✔ Backup & Disaster Recovery ✔ Level 2/3 MSP Support ✔ Infrastructure Audits & Documentation 𝗡𝗘𝗫𝗧 𝗦𝗧𝗘𝗣 If you're looking for a dependable infrastructure engineer who can troubleshoot complex issues, improve system reliability, and become a trusted extension of your IT team, send me a message with your requirements. I'll let you know how I can help and recommend the most practical approach for your environment.