Karthick Raj Rangaraj

Lead Engineer

Healthcare institutions support for entire Singapore hospitals under Ministry of Health. Web & Services support for EMR systems under NGEMR infra team (Next Gen Electronic Medical Record). Maintenance & Support of EPIC public systems applications such as Mychart & Bediside. Care Everywhere Project deployment and support. Maintenance lead collaborating with Ops , Citrix and application teams for EPIC client upgrades, RASU patching and monthly maintenances. Leading bi-early DR swing over (Prod & DR sites) for EMR infra tasks.

Client: Port of Singapore Authority. VM Migration from Azure Stack to Nutanix & vxrail. Work with business units to fulfill the infra requirements to support Servers/Applications go-live. Submit ACL request (firewall rules) for various applications running under PSA. Weekly & Monthly reporting on Projects, Day 2 Maintenances & Incidents. Support Vendors on application troubleshooting & fixes. Boomi (iPAAS) user accounts management (creation/deletion/group membership changes) to support API/application integration & code deployments for developers. 24/7 On-call Support on weekly rotation basis.

Client: Jurong Health Campus, Ng Teng Fong Genera Hospital (NUHS Cluster) Installation of standalone and SQL failover cluster servers. Veritas Netbackup SQL online & offline restore. Windows 2012 to 2016/2019 tech refresh upgrade projects. Change management and capacity planning new and existing setup. Windows server administration and troubleshooting. Server Farm upgrade of HP blade chassis / Proliant servers for ESXi & Storage Tech refresh Project (EMC Unity 450). Server/Application Virtualization projects. Security tightening for PAM Audits, nmap port scanning and blocking to close audit open items. Privileged access Management project support and Troubleshooting for applications/Servers. Implementing IT security standards & resolving audit findings and open issues. Managed Security Services implementation for servers, support and troubleshooting for Event Log Monitoring and Auditing. Deploy ATP (Palo Alto networks) & management for servers. Day to Day Operation for monitoring alerts, Service requests, Change requests. Deploy Group Policy like login scripts, screensaver password protected etc. Redhat Linux (7.x) Administration. SMTP (Postfix) setup and email relay support. Manage various software & hardware appliances (Veritas Netbackup Master/Opscenter, Vrealize Ops Manager etc. eG monitoring deployment & administration. Powershell/Powercli scripting to automate VMware related tasks. Vcenter 5.5 to 6.5 Upgrade, ESXi 6.5 installation upgrades, configuration and maintenance. VM provisioning, VM template updates, VM Migration projects etc. Upgrade of Vcenter/VMware ESXi/VMware tools/vm hardware version using VMware update Manager. F5 load balancer/tape library firmware upgrade, Veritas Netbackup master/media appliance upgrade (5250 appliance)/HP MSL 6480 tape library firmware upgrades. Perform VMware core services administration for 6.5 & 6.7 and troubleshooting. Veritas NetBackup 8.1.2 administration, backup and restore, it includes troubleshooting & maintenance job. Annual DR/recovery test. Microsoft DHCP & Infoblox DHCP administration and troubleshooting. Administration and maintenance of Tape library, backup schedule, Veritas media appliances 5250. Microsoft Security patching using WSUS/Bigfix. Perform root cause analysis and recommend fixes. Windows server hardening, IT security compliance, IT Audits & handling security incidents, emergency planning for patch management pro-active measures for such as Ransom ware attacks, Meltdown & Spectre vulnerabilities. Vmware Powercli and windows PowerShell scripting for VMware vsphere / Windows Server remote deployment/AD tasks/Maintenance tasks. Secondary Change/DC Ops manager and chaired CAB for planned major changes. Process streamline and technical documentation, SOP update, supervise System Support Ops Team. Perform and review Technical Design Spec, OAT, UAT for new systems before Go-Live for infra and application/DB/Web servers. Working on VA scan (Vulnerability scan) & fixes for new & existing servers. Coordinate & work with Network Team for Annual power shutdown/planned Network Maintenance & Network related task or troubleshooting, checking Switch, ports and Firewall traffic etc. Working with other teams & Vendors for any maintenance, implementation or troubleshooting. VMware vSphere 6.0 and 6.7 administrations & troubleshooting, fulfill service request, like create VM, migrate VM, and restore VM, etc. Security vulnerabilities fixes, emergency patching (zero day vulnerability/cyber security reported vulnerabilities) Windows & VMware hardening, IT Audit Security & Compliance related matters. Perform Annual Disaster Recovery tests. Represent changes in CAB and perform change implementation and validation. Provides 24/7 On-call support.

Client: Jurong Health Campus, Ng Teng Fong Genera Hospital (NUHS Cluster) Datacenter implementation and Migration. Implementations of Windows Server roles like WSUS, File and Print server, MS SQL Cluster, KMS, etc. Creation of OU, Groups and computer objects in AD & Group Policy Deployment. Windows servers provisioning and upgrades from 2008 to 2012 Windows server administration and troubleshooting DHCP server administration Group Policy modification Installation and basic SQL server 2012 administration VM provisioning and configuration VMware vSphere 5.5 administration & troubleshooting VMware update Manager implementation and administration Symantec NetBackup 7.7.2 administration, backup and restore, it includes troubleshooting and maintenance job. Creating and modifying NetBackup policies Administration and maintenance of Tape library Quarterly Microsoft Security patching using WSUS. Perform root cause analysis and recommend fixes Windows server hardening. Basic PowerShell scripting. 24/7 support both Onsite and remote support. Worked with different Vendors to resolve any application related issues or maintenance. Administration and support of Windows servers, Virtual Machines and ESX host.

Client: Motorola (EMEA Region Remote Infrastructure Support) Monitoring & troubleshooting the servers. Remotely managed and administer 400+ Windows servers (Windows NT, 2000, 2003 and 2008) including problem isolation and resolution (EMEA Support) Attending to incidents, Problems, Changes, Tasks, Service requests. Supporting alerts generated by system. For ex: CPU utilization, Disk space& memory utilization. Troubleshooting hardware issues on HP, Dell and IBM servers. Finding RCA’s for Problems and performing actions to prevent problems as proactive measures. Maintaining 100 % Server Uptime using Performance monitoring tools. Performing Monthly patching of application and infra/utility servers using Shawlik, VMware Vcenter protect. Handling P1/P2 cases use of SRT Process (Server restoration Team). File/Print migration and consolidation projects. Server commissioning and decommissioning projects. Handling VMware ESX servers, VM’s and performing Resource pooling, VM build, Migration projects P2V, V2V. Handling ICSR and tech refresh projects. Responsible for process documentation. Troubleshoot Windows server operating system technology (DNS, DHCP, Active Directory, Cluster, etc. Perform live troubleshooting with customer and provide resolution within Service Level Agreements Implement Change for (Monthly patching, hardware maintenance, software installation, etc. Practice Incident Management based on ITIL standards and CSC processes. Ensure the SLA is follow and meets.

Clients: ACTA Bank & UDE Schools, Norway. Monitoring & troubleshooting the servers. Performing Remote infrastructure management for Norway Clients. Attending to incidents, Tasks, daily issues. Supporting alerts generated by system. For ex: CPU utilization, Disk space& memory utilization. Creating RFC for change management tasks. Patch Management using MC patch tools. Maintaining 100 % Server Uptime using Performance monitoring tools. DHCP, ADS, DNS and services over the LAN. Responsible for process documentation.

Client: Foxconn India Pvt. Ltd. Datacenter Implementation including servers & desktops for site 2 IT Operations. Installed 2003 servers & Promoted as Domain controllers. Symantec Antivirus Corporate Edition 8.1 server and client management. Taking regular Backup with HP LTO Ultrium tapes for File, Mail & Development Servers. Troubleshoot remote administration of servers using ILO. Configured WSUS 2003, File server, DHCP, FTP, DNS and services over the LAN. Maintaining storage devices (HP SAN Array MSA 1000 & EVA 4000 storage. Deploy GPO for Site-2 Desktops & Servers. USB Port blocking using Device Lock servers. Providing support to Application Team. Installation of Hot fixes and patches for windows Servers. Responsible for process documentation. Norton Ghost imaging for desktops. Work with Vendors for HP servers firmware/driver upgrade, Maintenances & Hardware Troubleshooting.

Client: Irevna Financial Research Company India Pvt. Ltd. Installation of O/S & Applications (WIN2000, Win2003, Win XP). Configured File server, DHCP, DNS and services over the LAN. Symantec Antivirus Corporate Edition 8.1 server and client management. Troubleshooting Bloomberg Pc’s. Created Domain users & groups applying permissions. Diagnosed resolve network connectivity issues throughout the organization. Deployed Group Policies. Responsible for process documentation. Troubleshooting Hardware’s & resolving network connectivity issues. Mail configuration and troubleshooting in Microsoft outlook.

Provide Training on Hardware and networking, Windows, Linux & Cisco. Maintaining, Configuring, Troubleshooting Windows 2000 Servers & Desktops. Configuring, Troubleshooting PC Hardware issues & Networks Printer issues. Computer Assembling & upgradation. Computer troubleshooting, Configuration and management. Conducting Technical Seminars in colleges and corporate.

(Dept of Technical Education-Tamil Nadu)