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✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 9+ 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

As a highly experienced IT professional with over 12 years of expertise in Tier 2 Helpdesk Support and Tier 3 Server Administration, I am committed to delivering exceptional technical support tailored to businesses of all sizes. My services cover a wide range of tasks focused on maintaining the stability, security, and efficiency of your IT environment. You can expect reliable, responsive, and knowledgeable support across areas such as Office 365 administration, user onboarding/offboarding, email troubleshooting, server maintenance, backup management, and more. I take pride in resolving issues quickly, documenting clearly, and ensuring minimal disruption to your business operations. With a strong dedication to excellence and a deep understanding of both user-level and infrastructure-level support, I aim to be a trusted IT partner for your organization. I’m ready and willing to assist with any technical challenges you face and look forward to responding to your queries.

IT Expert with 8+ years of experience in Managing Windows and Linux-based server infrastructures, Network security and administration, and software solutions. Here are some major services on which I am working: ☑️- Server Administration : ✔️ Windows server : Intune , ADDC, DNS, DHCP, WSUS, Group Policy Management, RDP Server, WDS Server, IIS Server, MS Exchange Server, MS SharePoint, MS Office 365, MS One Drive, MS Teams, File Server (NAS & SAN) , FTP, NTP and many more ✔️ Linux Server : SAMBA ADDC LDAP, SAMBA File Server, DNS, DHCP, Mail Servers (Zimbra, PMTA, Send grid, Squirrel mail, Roundcube). Web Servers (Tomcat, apache, nginx, light speed), MySQL, MariaDB, Postgres, FTP, NTP, Ticketing tools (Manage engine, OS ticket, OTRS Ticket, Citrix XenApp, JIRA, Service now), Monitoring Tools ( Check_mk, Syslog, Nagios, Cacti, ELK Stack, Zabbix, PRTG), IDS Server ( OSSEC, WAZUH, SNORT, Suricata, BRO, Tripwire, Security Onion), DLP/Encryption/ Threat Prevention Server ( Symantec, Sophos, McAfee), Threat Intelligence server (MISP, Mitre, OpenCTI), The Hive with Cortex, ArcSight Server, Dialer Server ( VCdialer, go autodialer, ViciBox, Altitude Dialer), Virtaul Hypervisor ( VMware ESXi, Proxomox, Virtual Box, VMware Workstation), GenieACS TR-069 remote management server, Vulnerability Assessment Scanner Tools (OpenVAS, Nessus Professional, Wireshark, Comodo cWatch, Tripwire IP360) , SonarQube Code analysis Tool, NXfilter URL Filtering tool and Many More.. ☑️- Network Administration: Key Network Skills & Security Products Experience: o Firewall – Checkpoint, Cisco ASA, Palo Alto, Fortigate, Sophos, o Router & Switches : Cisco, Mikrotik, Ubiquiti, Netgear, Aruba o Intrusion Detection & prevention – Cisco, Checkpoint, Sophos o Switching: Vlan, Inter Vlan, Stp, Vtp, EtherChannel, Switch Port o Configuration and troubleshooting of routing protocols OSPF, RIP, EIGRP, BGP o Setup of security implementations (Filtering Tool ACL, route map, port security.) o Well versed in the operations, configuring, and troubleshooting of various issues in Checkpoint and Cisco, Mikrotik, Ubiquiti, Netgear & and Aruba Devices. o Checkpoint IPSec VPN Blade, Application & URL filtering Blade, IPS Blades, o Configuration & troubleshooting of IPSEC and S2S VPN ☑️- Information Security I help organizations stay compliant with all the important standards like PCI DSS, HIPPA, ISO 27001, GDPR, FISMA, and GLBA. In addition to these compliances, I also help companies with Information Security Assessments and Penetration and vulnerability Testing for identifying loopholes in their security infrastructure and BCP/DR consulting for building programs to stay ahead of future security incidents. ☑️- Cloud Solutions: I Help organizations to deploy their services on AWS, GCP, and Microsoft Azure cloud & Freshservices. Projects not for me: ✖Asking to hack/crack/access someone else accounts, systems, social media, etc

I support MSPs in delivering faster assistance, enhanced endpoint security, and streamlined IT operations. With over 11 years of experience across Helpdesk, NOC, Microsoft 365, Intune, ConnectWise, Autotask, Datto, ITGlue, and PowerShell automation, I independently manage tickets, optimize workflows, and drive efficient service delivery from day one. My strong communication skills enable me to manage difficult customers effectively and ensure they leave satisfied with a positive experience. Key Skills - Microsoft Azure Cloud Services - Microsoft 365 / Office 365 (Exchange, SharePoint, Teams, OneDrive) - Windows Server (2003/2008/2012/2016/2019/2021) - Exchange Server (2000–2019) - Windows OS (7, 8, 10, 11) - Exchange Migrations & Tenant Management - Azure AD, Azure Portal, Virtual Machines, Recovery Services - G Suite Administration - Mac OS Troubleshooting & Integration - IT Documentation (ITGlue, HUDU) - RMM & Ticketing Tools (ServiceNow, Jira, Autotask, Quick Assist, Datto) Server Platform Services - Enterprise server hardware & OS support - L1/L2/L3 support & problem management - User & access management - Performance & capacity management - OS installation, configuration, upgrade & migrations - Mac OS integration with Windows networks Certifications MS-101 - Plan, implement, and manage Microsoft 365 services securely and efficiently. MS-203 - Microsoft 365 messaging, including Exchange Online, hybrid configurations, security, and compliance MS-500 - Identity and access management, information protection, and Microsoft 365 compliance. MS-100 - Enterprise Administrator Expert credential. MS-533 - Manage and deploy Azure services MS-663 - Exchange on premise implementation and designing. MS-662 - Mailflow and Exchange infrastructure design MCSA - Microsoft Certified Solutions Associate MCSE - The Microsoft Certified Solutions Expert Education MBA in Information Technology

I am an Apple Certified Trainer, and Instructional Designer. With a unique blend of areas of expertise in Training, Teaching and Technical Support, currently working as a freelance trainer on macOS Technical Workshop. Trained Organisations/Individuals about Apple technology, deployment and manage Apple devices. Facilitated learners on integration of technology in teaching & Learning process to enhance the student learning experience, utilising different types of tools in the classroom. Designing and Developing training modules and educational resources.

🔥 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.