Summary
Overview
Work History
Education
Skills
Certification
REFERENCE SITES
Timeline
Generic
Sundar K

Sundar K

Summary

Seasoned Senior Unix/Linux System Administrator with over 13 years of experience in designing, deploying, and managing enterprise IT infrastructure across Solaris, Red Hat Enterprise Linux (RHEL), Oracle Linux, SUSE Linux, and CentOS platforms. Deep technical expertise in virtualization technologies such as LDOMs, Solaris Zones, Oracle VM, VMware vSphere, and KVM, as well as container orchestration platforms like OpenShift and Kubernetes . Certified cloud engineer with extensive knowledge on AWS and Azure .Certified Project Management Professional (PMP) with a reputation for structured project leadership and delivery excellence on complex IT initiatives. Proficient in high-availability clustering, disaster recovery solutions, advanced storage and volume management, system patch lifecycle management, system migrations, enterprise backup and recovery solutions, web and network services configuration, infrastructure monitoring, performance tuning, cloud environments support, and secure infrastructure solutions design and implementation. Recognized for operational excellence, audit compliance, process documentation, and effective team coordination in mission-critical production environments.

Overview

14
14
years of professional experience
1
1
Certification

Work History

Senior System Engineer, Unix

CTC Global Pte Ltd
01.2020 - Current
  • Administered and supported enterprise Unix/Linux environments across Solaris, RHEL, Oracle Linux, SUSE Linux, and CentOS platforms.
    • Designed and managed virtualization solutions using LDOMs, Zones, Oracle VM, VMware, and KVM, including container orchestration with OpenShift and Kubernetes.
    • Implemented and maintained high-availability clusters using Solaris Cluster, Red Hat PCS, and Veritas Cluster Server for critical business applications.
    • Led SAN storage migrations and managed advanced volume management with ZFS, SVM, VXVM, and LVM to ensure data integrity and performance.
    • Executed system patching and compliance using Red Hat Satellite and IBM BigFix, automating patch deployment and vulnerability remediation.
    • Automated infrastructure provisioning with Terraform, including cloud-based deployments and network configurations, following infrastructure-as-code best practices.
    • Developed and executed configuration management workflows using Ansible, including dynamic inventories, role-based playbooks, and secure automation of application deployments.
    • Performed system migrations (P2V/V2V) and OS upgrades with minimal downtime, including kernel tuning and performance optimization.
    • Managed enterprise backup and recovery using EMC NetWorker and Veritas NetBackup, including VM-level backups and BMR strategies.
    • Configured and supported core network services such as Apache, Tomcat, DNS, NIS, and Samba in secure and scalable environments.
    • Monitored infrastructure health using SolarWinds, Zabbix, Nagios, and Netgain, ensuring proactive issue resolution and capacity planning.
    • Utilized Splunk for centralized log management, real-time analysis, and automated monthly reporting to support audits and operational insights.

Technical leader

Huawei Technologies
09.2018 - 11.2019
  • Led Unix/Linux infrastructure operations across four regional data centers (Uganda, Swaziland, Zambia, South Sudan), supporting over 1000 physical and virtual servers.
  • Administered enterprise Solaris and Linux environments (RHEL, SUSE, Oracle Linux, CentOS), ensuring system stability, performance, and availability.
  • Built and deployed new servers for business expansion and technology refresh projects, including hardware provisioning, OS installation, and configuration standardization.
  • Managed virtualization platforms including Oracle VM (OVM), VMware, and KVM, supporting dynamic resource allocation and high-density workloads.
  • Implemented and supported Solaris Cluster and Veritas cluster for high-availability and failover of critical applications and services.
  • Performed routine patch management and system updates using Red Hat Satellite ensuring compliance with security and operational standards.
  • Monitored system health and performance using Nagios enabling proactive incident response and capacity planning.
  • Provided technical leadership and team coordination, ensuring timely delivery of infrastructure projects and adherence to ITIL-based operational processes.

Senior Specialist

HCL Technologies
07.2017 - 09.2018
  • Administered and supported enterprise-grade Solaris and Red Hat Enterprise Linux (RHEL) environments, ensuring system stability, performance, and security across production and DR sites.
  • Provided L3-level support for complex incidents, root cause analysis, and permanent resolution of OS-level issues in mission-critical systems.
  • Designed, deployed, and managed Solaris Zones and LDOMs for workload isolation, resource optimization, and secure multi-tenancy on SPARC platforms.
  • Performed Red Hat patch management using Satellite and YUM repositories, including kernel updates, CVE remediation, and compliance reporting.
  • Automated system provisioning and configuration using Kickstart and shell scripting, ensuring consistency and reducing manual overhead.
  • Conducted performance tuning and kernel parameter optimization for high-throughput applications and database workloads.
  • Implemented and supported high-availability configurations using native Solaris Cluster.
  • Led OS-level hardening and audit compliance initiatives, aligning with CIS benchmarks and internal security policies.
  • Built and deployed new systems as part of infrastructure expansion and technology refresh programs, including hardware lifecycle management.
  • Collaborated with cross-functional teams for capacity planning, infrastructure upgrades, and continuous service improvement.

ITC Service Delivery Cons

Hewlett Packard Enterprise
08.2015 - 01.2017
  • Acted as the first escalation point for complex system alerts and service disruptions, coordinating with L1 teams and escalating to L3 when necessary.
  • Performed daily health checks on Solaris and Linux servers, validating system uptime, disk usage, and service availability.
  • Supported scheduled maintenance activities including server reboots, log rotation, and temporary resource adjustments.
  • Assisted in provisioning virtual environments and performing basic configurations on Solaris Zones and Linux-based VMs.
  • Participated in patch window preparations by validating system readiness, backing up configurations, and verifying post-patch functionality.
  • Maintained and updated inventory records for physical and virtual assets, including OS versions, patch levels, and hardware details.
  • Responded to user access and permission requests, managing sudo privileges and group memberships in compliance with security policies.
  • Coordinated with storage and network teams for resolving I/O bottlenecks, mount issues, and connectivity problems.
  • Supported change management processes by reviewing change tickets, executing approved changes, and documenting outcomes.
  • Contributed to knowledge base development by documenting troubleshooting steps, FAQs, and standard procedures for recurring issues.

Engineer IMTS

Mindtree Pvt Ltd
02.2014 - 08.2015
  • Managed and maintained over 200 Solaris and Linux servers (RHEL, CentOS) across production, development, and disaster recovery environments.
  • Performed daily system health checks, log analysis, and capacity monitoring to ensure high availability and performance.
  • Carried out traditional patching and system updates on Solaris and Linux servers using manual methods and custom scripts, ensuring system stability and security compliance.
  • Automated routine administrative tasks using shell scripting and cron jobs, improving operational efficiency and reducing manual workload.
  • Built and configured new servers for infrastructure expansion and technology refresh projects, following standardized deployment and hardening procedures.
  • Conducted performance tuning and troubleshooting of CPU, memory, and disk I/O issues to optimize system behavior under varying workloads.
  • Participated in change management processes, including planning, execution, and documentation of system changes and upgrades.
  • Responded to incidents and service requests, performing root cause analysis and implementing corrective actions to prevent recurrence.
  • Maintained accurate system documentation, configuration baselines, and operational procedures to support audits and internal knowledge sharing.

Junior Unix Administrator

IBM India Pvt Ltd
12.2011 - 08.2013
  • Provided Level 1 support for Unix environments, assisting with basic troubleshooting, system monitoring, and incident resolution.
  • Managed user and group accounts, including creation, modification, and deactivation, in alignment with IAM (Identity and Access Management) policies.
  • Monitored system performance, disk usage, and service availability using basic tools and scripts, escalating issues to senior engineers as needed.
  • Performed routine filesystem tasks such as mounting/unmounting file systems, checking disk quotas, and managing file permissions.
  • Assisted in log file review and basic analysis to support troubleshooting and proactive system maintenance.
  • Supported patching and update activities by preparing systems, verifying pre/post conditions, and coordinating with L2/L3 teams.
  • Participated in server health checks and daily operational tasks to ensure system availability and performance.
  • Responded to service desk tickets related to login issues, file access problems, and system alerts on Solaris and Linux servers.
  • Documented standard procedures, troubleshooting steps, and access requests for internal knowledge base and audit readiness.
  • Assisted in onboarding and provisioning of user environments, including shell access setup and home directory configuration.

Education

Bachelor of Computer Science And Engineering - Computer Science and engineering

Anna University
Thiruvalluvar College Of Engg And Technology
01.2010

Skills

  • Solaris 10 and 11 – Latest stable release for enterprise environments
  • Red Hat Enterprise Linux (RHEL) 7,8 and 9
  • Oracle Linux 7,8
  • SUSE Linux Enterprise Server (SLES) 15 SP6
  • CentOS Stream 7,8
  • Oracle VM Server for SPARC (LDOMs) – Latest supported version: 36
  • Solaris Zones – Integrated with Solaris 114
  • VMware vSphere 80
  • KVM (Kernel-based Virtual Machine) – Integrated with RHEL 9x
  • OpenShift Container Platform 418
  • Kubernetes 130
  • Redhat Ansible Automation
  • Terraform
  • Solaris Cluster 44
  • Red Hat PCS (Pacemaker/Corosync) – RHEL 95 compatible
  • Veritas Cluster Server (VCS) 80
  • VXVM (Veritas Volume Manager)
  • EMC NetWorker
  • Veritas NetBackup
  • SolarWinds Server & Application Monitor 2025
  • Zabbix 70 LTS
  • Nagios Core 45
  • Splunk Enterprise 92 – Used for log aggregation, real-time analysis, and automated reporting
  • Microsoft Azure – Hybrid cloud integration and migration projects
  • Amazon Web Services (AWS) – Infrastructure deployment and cloud-native services

Certification


  • 2024 Project Management Professional (PMP)
  • 2025 Certified Kubernetes Administrator (CKA)
  • 2025 Redhat Certified OpenShift Administrator
  • 2025 Redhat certified System administrator
  • 2025 Oracle Certified Professional (OCP Solaris 11)
  • 2025 EMC Specialist - Systems Administrator, NetWorker
  • 2025 Microsoft Certified Azure Administrator Associate
  • 2025 AWS Certified Solutions Architect - Associate

REFERENCE SITES

www.linkedin.com/in/sundarrajan-krishnamoorthy-0062a126a

Timeline

Senior System Engineer, Unix

CTC Global Pte Ltd
01.2020 - Current

Technical leader

Huawei Technologies
09.2018 - 11.2019

Senior Specialist

HCL Technologies
07.2017 - 09.2018

ITC Service Delivery Cons

Hewlett Packard Enterprise
08.2015 - 01.2017

Engineer IMTS

Mindtree Pvt Ltd
02.2014 - 08.2015

Junior Unix Administrator

IBM India Pvt Ltd
12.2011 - 08.2013

Bachelor of Computer Science And Engineering - Computer Science and engineering

Anna University

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