Hire the Best VMware Administrators in Colombo, LK

Microsoft 365 Architect | Exchange Online | Intune | Entra ID | Defender | Purview Helping businesses securely migrate, manage, and optimize Microsoft 365 environments. Hello, I'm Kesavan, a Microsoft Certified Microsoft 365 and Security Specialist with experience helping organizations modernize their IT environments using Microsoft technologies. I work with businesses of all sizes, from small organizations to enterprise environments, delivering secure, reliable, and scalable Microsoft 365 solutions. My focus is helping clients improve security, simplify administration, strengthen compliance, and maximize the value of their Microsoft 365 investment. Services I Provide Microsoft 365 Deployment, Administration & Migrations • Microsoft 365 tenant setup, configuration, and management • Exchange Online, Microsoft Teams, SharePoint Online, and OneDrive administration • Migrations from Exchange Server, Google Workspace, GoDaddy, Zoho, and other platforms • User onboarding, licensing, and Microsoft 365 optimization Microsoft Intune & Endpoint Management • Microsoft Intune deployment and configuration • Windows Autopilot implementation • Device compliance and security policies • Mobile Device Management (MDM) and Mobile Application Management (MAM) • Application deployment and endpoint security management Identity & Access Management • Microsoft Entra ID (Azure AD) • Multi-Factor Authentication (MFA) • Conditional Access Policies • Privileged Identity Management (PIM) • Hybrid Identity and Azure AD Connect Security & Compliance • Microsoft Defender for Endpoint, Office 365, and Defender XDR • Microsoft Purview Information Protection and Data Loss Prevention (DLP) • Sensitivity Labels, Retention Policies, and Compliance Solutions • Security Assessments and Microsoft Secure Score Improvement • Security hardening and best-practice implementation Technical Support & Consulting • Microsoft 365 troubleshooting and administration • Exchange Online mail flow and migration support • Teams, SharePoint, and OneDrive support • Security and compliance consulting • Ongoing Microsoft 365 managed services Why Clients Work With Me ✔ Microsoft Certified Professional with expertise across Microsoft 365, Security, Identity, and Compliance ✔ Proven experience delivering migration, security, and endpoint management projects ✔ Strong focus on security, reliability, and business outcomes ✔ Clear communication, responsive support, and professional project delivery ✔ 100% Job Success Score with successful project delivery across multiple industries Certifications • MS-102 – Microsoft 365 Certified: Administrator Expert • SC-300 – Microsoft Certified: Identity and Access Administrator Associate • SC-400 – Microsoft Certified: Information Protection Administrator Associate • SC-401 – Microsoft Certified: Information Security Administrator Associate • MS-700 – Microsoft Teams Administrator Associate • MS-900 – Microsoft 365 Certified: Fundamentals Whether you need to migrate to Microsoft 365, strengthen security, deploy Intune, implement compliance controls, or optimize your existing environment, I can help you achieve a secure and efficient solution that supports your business goals. Let's discuss your requirements and build the right Microsoft 365 solution for your organization.

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.

✅ Self-motivated Linux Server Administrator and Network Administrator with more than 10+ years of working experience with different Cloud providers. Ready to take up any challenge. ✅ Expert on, 💎 AWS, Google Cloud, Azure, DigitalOcean or onPrem server management. 💎 Setting up and manage different environment Web Server, Database Server, Mail Server, Load Balancer, Optimization and Security. 💎 Designing Web Server - Building web server based on Apache, Nginx, Nginx/php-fpm, Varnish as backend with high performance tuning and major security issues. 💎 Learning Management Systems – Moodle (Expert) including mobile app (Android & Apple IoS) customization 💎 Document Management Systems – Nextcloud (Expert) and onlyoffice 💎 Security - Malware removal, server hardening using firewall rules, restriction in server login, Web security, Security auditing, fail2ban, mod_security for web attack, mod_evasive DDOS attack prevention, Firewall setup CSF, UFW and iptables. Prevention from mail attack, SSL Certificate installation. 💎 Database Server - Building MySQL, Mariadb database server with high performance , troubleshoot database server problems, tweaking MySQL variables for performance. 💎 Scripting - Bash Scripting for monitoring servers, auto backup. 💎 Mail server- Building mail server for sending and receiving mails postfix, sendmail, setup mail client Roundcube, SquirrelMail, Rainloop, Horde. Dovecot for POP & IMAP, troubleshoot mail issues, configure mail for delivery in inbox. 💎 Monitoring services and servers – LibreNMS, Nagios monitoring tools, tweaking as per requirement, monitor servers using bash script, Tripwire. 💎 Amazon - AWS EC2 server setup, Security. 💎 Cloud Servers & Panel - Management of Ubuntu, Centos, Cpanel, CWP, WHM, Plesk, Webmin, Diretadmin, ISPConfig, JustHost, Godaddy, Linode, Rackspace, Amazon. 💎 Migration - Server migration, website migration, database server migration, mail server migration. 💎 VOIP Solutions - Asterix based PBX (Eg: VitalPBX) 💎 Video conferencing - Zoom (including on premise setup), Jitsi, BigBlueButton 💎 Virtualization Technology - VMware VSphere Esxi, KVM, Xen Server 💎 Networking (CCNP R&S and SP certified) - Hands on experience with CISCO, HP, Extreme, Juniper devices including wireless. 💎 Firewall configurations - Hands on experience with Palo Alto, Check point and Cisco ASA firepower. ✅ Please do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your team.

I’m a DevOps enthusiast with a strong focus on cloud-native systems and infrastructure automation. I have hands-on experience designing, deploying, and managing scalable cloud environments, automating application delivery, and improving system reliability, performance, and operational efficiency. Key areas of expertise: Cloud Platforms AWS (EC2, RDS, S3, Route53, ELB/ALB, VPC, IAM) Google Cloud Platform (GCP) Microsoft Azure DigitalOcean, Linode, Oracle Cloud Containerization & Orchestration Docker, Docker Compose Kubernetes (Rancher, Amazon EKS, K3s, RKE2) Helm (chart management and deployments) Containerd Istio (service mesh) Infrastructure as Code & Automation Terraform Ansible (configuration management & deployments) CI/CD & Build Tools Jenkins GitLab CI GitHub Actions Maven, Gradle Version Control & Collaboration Git, GitHub, GitLab Monitoring & Observability Prometheus, Grafana, Alertmanager, Thanos Web Servers & Reverse Proxies Nginx, Apache Databases & Storage MySQL, PostgreSQL, MariaDB, MongoDB, ClickHouse Redis (caching) MinIO (S3-compatible object storage) Operating Systems & Virtualization Linux (Ubuntu, Debian, Kubuntu), Windows VirtualBox, VMware, KVM Scripting & Programming Bash, Python Security & Networking SSL/TLS, Certbot, Let's Encrypt WireGuard, Tailscale (VPN) DNS management Other Tools & Productivity JIRA (ticketing) scp, rclone (file transfer) Vaultwarden Editors: Vim, Nano n8n (workflow automation), CrewAI WordPress (CMS deployments)

I am the member of the MIS team and covering all release managements and server operations. I currently handle ESXi and ESX server farm in Australia and USA. • Have experience installing, maintaining and troubleshooting VMWare servers.  ESXi and ESX Vsphere servers.  Installing, maintaining iSCSI software. (OpeanFiler / OPEN-E / HP LeftHand) • Have experience installing, maintaining and troubleshooting MS Windows Server 2008 and 2003.  Installing, maintaining and troubleshooting domain controller.  Have experience in Active Directory maintaining and troubleshooting.  Customizing Group Policies.  Scheduling Backups.  Domain Replications.  DFS Replications.  Installing, maintaining and troubleshooting IIS 7 and 6.  DHCP Server installation, maintaining. • Have experience installing, maintaining and troubleshooting MS Office SharePoint Server 2007 and 2010. • Have experience installing, maintaining and troubleshooting MS Exchange server 2010. • Have experience installing, maintaining and troubleshooting following software firewalls.  MS ISA Server 2006.  Untangle (Open Source)  SmoothWall (Open Source) • Have experience installing, maintaining and troubleshooting PLESK control panel and Cpanel. • Have experience installing, maintaining and troubleshooting UBUNTU/ CentOS / RedHat / SUSE Linux / Sun Solaris servers.  Installing Apache Server, Virtual hosting, Apache SSH configurations and Apache failover clustering.  Installing MySQL Server, MySQL data base replication and failover cluster.  Installing FileZilla FTP Server  Scheduling cron jobs.  ISC DHCP failover clustering. • Have experience installing Windows 7, Windows XP, UBUNTU, KUBUTU, and Fedora. • Have experience working with Amazon cloud computing and Soft Layer cloud computing. • Have experience in installing, maintaining and troubleshooting wireless network. • Can maintain and troubleshoot LAN environment. • Have experience installing MS SQL 2008 and 2005 servers. I’m maintaining daily backups in MS SQL servers and database management. • Have Experience installing and maintaining CISCO ASA 5505 Firewall, CISCO Routers and CISCO Switches.  Routing Protocol RIP, IGRP, RIP v2, EIGRP, OSPF  Creating Vlan  Nating  Creating VPN

BS.c, MS.c In Electronics & Telecommunication/ IT Security CCSA, CCNA-CCNP R&S,CCNA-CCNP Security, CISSP, CEH, CHFI, LPT, CSX, CISM In my last 7 years i have been working on variety of System/Network products and have gained wide experience in Microsoft, Cisco, Intel McAfee, Azure, AWS, AlienVault, PaloAlto, Fortigate, Sonicwall, Checkpoint, HP/EMC, F5 ,Radware technologies. Used Different Products and infrastructures such as Windows, Linux desktop/server administration, Network infrastructure administration including Cisco iOS, Juniper or 3rd party (Switches, Routers, Firewalls), Cisco and other Wireless products, Snort, Alien Vault, McAfee DLP/IPS/Web gateway products, Network monitoring products (Net flow Analyzer/PRTG/Noci), NAC Solutions (Cisco, Forescout), Load balance solutions (Radware, F5), URL Filters (FortiGate/Palo Alto/PF Sense), Proxy solutions (Bluecoat/McAfee Web gateway), VMWare ESX, Veeam, Amazon AWS, Azure Cloud Solutions, Office 365, Google Apps. I have been involved in design, configuration and troubleshooting of Network products. ***Firewalls: Palo Alto PA500/PA4000, Cisco ASA 5500 Series Cisco RV Series Cisco IAS 500 Series Cisco PIX Cisco IPS 4200 Series Fortigate 40C Fortigate 60C Fortigate 60D Fortigate 800C Fortigate 100C Fortigate 310B Fortigate 620B Checkpoint 4000 Appliance Checkpoint 2200 Appliance Checkpoint 12400 Appliances Checkpoint 12600 Appliances Sonicwall TZ Series Sonicwall NSA Series DrayTek Vigor 3200 Series DrayTek Vigor 2925 Series DrayTek Vigor 2920 Series Pfsense Juniper SRX Series Juniper SSG Series. ****Load Ballancers: F5 BIG-IP 4000s F5 BIG-IP 3900 F5 BIG-IP 2200s F5 BIG-IP 2000s F5 BIG-IP 1600 Radware LinkProof 200/208 Radware App Director Cisco ACE 4700 Application Control Engine Barracuda 440 Routers: Cisco 800 Series Cisco 1700 series Cisco 1800 series Cisco 2600 series Cisco 2800 series Cisco 2900 series Cisco 3800 series Cisco 1000 series Cisco 7600 series Switches: Cisco SG300 Cisco Catalyst 2900 series Cisco Catalyst 3500 series Cisco Catalyst 3600 series Cisco Catalyst 4500 series Cisco Catalyst 6500 series Cisco Catalyst 6800 series HP 3500 series HP 2500 series Netgear Prosafe GSM 7224 Netgear FS750T2 Netgear FS728TS Netgear FS728TP *****Wireless Controller & Access Points: Cisco Meraki, Cisco WLC 2500 series Cisco WLC 2600 series Cisco Aironet 3600 Series Cisco Aironet 2600 Series Cisco Aironet 1600 Series NETGEAR ProSAFE® Wireless Access Points ******NAC: Forscout and Cisco NACs.