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🔥 20,000+ Hours | 300+ Jobs | Tier 3 Technical Support & System Administrator Are technical bugs, software glitches, or system downtime disrupting your business operations? I am a veteran Technical Support Engineer and Desktop Administrator with over 17 years of hands-on experience diagnosing, troubleshooting, and resolving complex IT infrastructure issues. My career is anchored by delivering enterprise-grade, Tier 3 (L3) support for global technology leaders like Sony VAIO, AT&T, and McAfee. From cross-platform desktop management to enterprise cloud environments, I provide rapid, highly reliable remote helpdesk support to ensure your business-critical systems maintain maximum uptime. 🛠️ CORE TECHNICAL EXPERTISE: =========================== • Tier 1–3 Technical Support: Advanced remote troubleshooting for proprietary software, desktop applications, operating systems, and digital products. • Desktop Support & Administration: Comprehensive system configuration, optimization, performance tune-ups, and OS patch management for Windows 11, macOS, and Linux. • Remote Endpoint Management: Fast, secure remote access and incident resolution utilizing enterprise tools like ConnectWise, TeamViewer, LogMeIn, and AnyDesk. • Cloud & Workspace Administration: End-to-end management of Microsoft 365 (Exchange Online, Teams, SharePoint, OneDrive) and Google Workspace environments. • Network & Email Diagnostics: Configuring and troubleshooting secure email deliverability (DNS, MX, SPF, DKIM, DMARC) and implementing robust multi-factor authentication (MFA) via Microsoft Entra ID (Azure AD). 🔬 DEDICATED HARDWARE & TESTING LAB: ==================================== To guarantee safe, accurate troubleshooting without disrupting your live environment, I maintain a fully equipped physical and virtual testing lab to replicate your exact issues: ✔ Operating Systems: Workstations running native Windows 11, macOS, and isolated Linux Virtual Machines (VMs). ✔ Mobile Ecosystems: Physical iPhone, iPad, and Android devices for mobile application and MDM testing. 🏆 A PROVEN HISTORY OF RELIABILITY: ================================== ✔ 17+ Years of deep, real-world IT support industry experience. ✔ 20,000+ Logged hours on Upwork with a flawless long-term job success history. ✔ Enterprise Background: - 3 Years: Technical Support Engineer for McAfee Antivirus products. - 2 Years: L3 Technical Support for SONY VAIO Computers. - 2 Years: Technical Support Specialist for AT&T ConnecTech. Whether your team needs a dedicated technical expert to clear out a backlogged helpdesk ticket queue, or you need an on-call administrator to handle an urgent system outage, I deliver elite results with zero friction.

✅ 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 help businesses run secure, reliable IT — across Microsoft 365, Azure, AWS, Google Cloud, servers, networks and security. With 14+ years in IT, including 6.5 years with US, Europe, and Australia-based MSPs, I've supported clients across US, UK, Australia, Africa, UAE, Singapore, Maldives, India, and Europe. I've delivered 78+ successful IT projects — spanning Azure, servers, Microsoft 365 and email/domain migrations — managing multiple client environments from a single, centralized point of support. This means one reliable partner handling your migrations, infrastructure, security and day-to-day IT, with everything documented and coordinated in one place. Whether you need a clean migration, a security clean-up, infrastructure set up properly, or dependable ongoing support, I can take it from assessment through to delivery — and explain it clearly. What I help with: Microsoft 365 & Email — administration, security, remediation; migrations (tenant-to-tenant, Google/GoDaddy → M365, mailbox, SharePoint/OneDrive, Teams & Teams Phone) Azure, AWS, Google Cloud — IaaS, Entra ID (Azure AD), Intune, Conditional Access, on-prem → Azure disaster recovery Windows & Linux Servers — Windows Server (2012–2019), Active Directory (migration, upgrade & cleanup), ADFS, RDS/AVD, MSSQL, IIS, Linux administration & hosting (cPanel, Apache) Networking & Security — Fortinet & SonicWall firewalls, VPN, DNS/DHCP, Wi-Fi; cybersecurity, MFA, endpoint protection, ISO 27001 / SOC 2 support Infrastructure & Continuity — VMware, Hyper-V, NAS, backup & disaster recovery, monitoring (Nagios/Checkmk) I focus on clear communication, on-time delivery and thorough documentation — you get the work done right, and explained in plain language. I also lead a small, experienced IT team, so reliable coverage across time zones is available when a project needs it.

Is your IT infrastructure holding your business back? I help small and mid-sized businesses and the MSPs that support them- build reliable, secure, and scalable IT environments that work. With 10+ years of hands-on experience as a Tier 3 MSP engineer, I've managed complex environments across dozens of clients: setting up and migrating to Microsoft 365 and Google Workspace, designing bulletproof backup strategies, hardening endpoints, and keeping infrastructure humming, even when things go wrong. Here's where I can add immediate value: → MSP Support & Escalations: I step in as a senior resource when your team hits a wall. RMM tools (Datto, Syncro, Kaseya), PSA platforms (ConnectWise, Autotask), and complex escalations are my wheelhouse. → Backup & Disaster Recovery: I design and manage backup solutions using MSP360, Vembu, SolarWinds, and Datto Backupify, covering local, cloud, and Microsoft 365 environments so your data is always recoverable. → Cloud Migrations: Whether moving from on-prem to Microsoft 365 or Google Workspace, I handle migrations cleanly, minimizing downtime and user disruption. → Infrastructure & Security: From SonicWall and Sophos firewalls to VMware/Hyper-V virtualization and endpoint protection (ESET, Bitdefender), I build environments that are both performant and secure. I'm detail-oriented, communicative, and know how to work independently; you won't need to hand-hold me if you need a senior IT professional who can hit the ground running. Let's talk!

9+ Years Supporting MSPs & Businesses | Microsoft 365 | Windows Server | Azure I help businesses and MSPs reduce downtime, resolve technical issues quickly, and keep their users productive. With over 9 years of IT experience, I specialize in Microsoft 365, Windows Server, Active Directory, Citrix, Azure, VMware, networking, and helpdesk operations. I've supported 50+ organizations and worked with a wide range of MSP tools, including ConnectWise, Datto RMM, NinjaOne, HaloPSA, Freshdesk, IT Glue, and ServiceNow. Whether you need Microsoft 365 administration, Windows Server support, Citrix troubleshooting, user management, or ongoing MSP assistance, I bring a proactive approach, strong communication skills, and a commitment to seeing issues through to resolution. Available during US business hours, including EST and PST schedules. If you're looking for a dependable IT professional who takes ownership and delivers results, let's connect.

𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐯𝐞 𝐒𝐮𝐩𝐩𝐨𝐫𝐭 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭 with over two decades of experience helping businesses stay organized, accurate, and efficient. I've completed 2,500+ projects on Upwork for clients in healthcare, real estate, ecommerce, SaaS, legal, and finance — and I run a small, trained team through my company, Login Services, so I can scale up without losing quality control or a single point of contact. Clients typically come to me for clean data, qualified leads, or dependable day-to-day support. Here's how I handle each one. 𝐃𝐚𝐭𝐚 𝐞𝐧𝐭𝐫𝐲 & 𝐝𝐚𝐭𝐚 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 — I handle high-volume, high-accuracy data work — invoice entry, CRM record updates, database cleanup and deduplication, PDF-to-Excel/Word conversion, product listing uploads, batch proof reports, and structured data extraction from websites, PDFs, directories, and scanned documents. Every batch goes through a multi-step quality-control pass — format checks, duplicate detection, and a final accuracy review — before it reaches you, so you're not the one catching my errors after the fact. I also handle manual transcription (general, business, and legal/medical), captioning, and timestamping when a project calls for them. 𝐁𝟐𝐁 𝐥𝐞𝐚𝐝 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐩𝐫𝐨𝐬𝐩𝐞𝐜𝐭 𝐫𝐞𝐬𝐞𝐚𝐫𝐜𝐡 — I build targeted, verified contact lists using LinkedIn Sales Navigator, Apollo, ZoomInfo, Lusha, SalesQL, and Crunchbase — filtered by industry, company size, revenue, geography, decision-maker role, technology stack, funding status, or hiring activity. Beyond just sourcing names, I do data enrichment, contact verification, and CRM upload, so the list lands in your pipeline ready for outreach rather than a raw spreadsheet you still have to clean and check yourself. I've built lists for founders, marketing managers, HR professionals, and purchasing teams across healthcare, technology, real estate, manufacturing, and professional services. 𝐕𝐢𝐫𝐭𝐮𝐚𝐥 𝐚𝐬𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞 & 𝐚𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐯𝐞 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 — This is the core of what I do day-to-day: email and calendar management, online research, CRM maintenance (Salesforce, HubSpot, Zoho), file organization, meeting agendas, reporting, form completion, and general administrative support. I also work in two specialized lanes where accuracy and confidentiality matter more than usual: — 𝐌𝐞𝐝𝐢𝐜𝐚𝐥 𝐕𝐢𝐫𝐭𝐮𝐚𝐥 𝐀𝐬𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞: EMR data entry, records management, insurance verification, preauthorization requests, prescription refill coordination, scheduling, and medical transcription. I'm HIPAA-aware and treat patient data with the discretion it requires. — 𝐋𝐞𝐠𝐚𝐥 𝐕𝐢𝐫𝐭𝐮𝐚𝐥 𝐀𝐬𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞: legal document review and transcription, filing, PACER and CM/ECF research support, legal pleadings formatting, process documentation, and correspondence drafting. 𝐄𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 — Product listings and bulk uploads, inventory and stock updates, order fulfillment coordination, shipping label management, and catalog consistency across Shopify, Amazon Seller Central, WooCommerce, Etsy, and BigCommerce. I've also supported Amazon-specific work — FBA coordination, listing optimization, and competitor research using Helium 10 and Jungle Scout — for sellers who need their catalog kept clean at scale. Industries I've supported — Healthcare, real estate, ecommerce, SaaS, technology, finance, education, legal, manufacturing, logistics, marketing, retail, and construction. Different industries carry different compliance and formatting expectations, and I adjust rather than treat every project the same way. 𝐇𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤 — Most engagements start with a short kickoff to confirm format, tools, and delivery cadence, then move to a small trial batch or sample deliverable so you can check quality before committing to volume. For ongoing work, I send regular progress updates rather than going quiet until the deadline — you shouldn't have to ask where things stand. Tools I work in — Microsoft Excel & Office, Google Workspace, Salesforce, HubSpot, Zoho CRM, LinkedIn Sales Navigator, Apollo, ZoomInfo, Airtable, Notion, Trello, Asana, Shopify, Amazon Seller Central, WooCommerce, WordPress, and standard OCR/PDF conversion tools. Why clients stick around — — Fast turnaround without cutting corners on accuracy — I'd rather flag a delay early than deliver something wrong on time. — Clear, proactive communication. If something looks off in your data or instructions, I ask before I guess. — Confidential handling of sensitive data, with extra care on medical and legal work. — Able to scale from a solo task to a multi-person project through Login Services, without losing the quality control that comes from one person owning the relationship. If you need someone to take data entry, lead generation, or day-to-day admin off your plate — reliably, without hand-holding — I'd be glad to help. Message me and let's talk about what you need.