Nagarjuna Nallamadugu
Dubai,UAE
Summary
IT professional with 14 years of global experience in Linux/Unix administration, Windows, and virtualization technologies, including VMware and RedHat Virtualization. Expertise in container management with Kubernetes, RedHat OpenShift and Docker, and proficient in DevOps practices utilizing Ansible and GitLab OpenShift Pipelines. Strong knowledge of cloud services such as AWS and Azure, alongside experience in storage and backup solutions like Commvault and NetApp. Proven track record in project management and IT operations, enhancing organizational efficiency through effective change and incident management aligned with ITSM principles.
Overview
14
14
years of professional experience
4
4
years of post-secondary education
4
4
Certifications
Work history
Sr. System Engineer
ITC Infotech, Client : Flydubai
Dubai, United Arab Emirates
08.2025 - Current
- Evaluated infrastructure setup and proposed essential enhancements.
- Managed end-to-end system administration, virtualization, and cloud operations for IT infrastructure supporting flight operations.
- Oversaw VMware vSphere, Linux, and Windows environments, ensuring high availability and performance optimisation.
- Administered AWS and Azure services, implementing HA/DR configurations and managing automation through Ansible and Terraform.
- Coordinated with cross-functional teams to ensure system uptime and enhance IT efficiency through proactive monitoring and RCA-driven improvements.
- Supported technical requirements for users and clients, ensuring timely issue resolution aligned with ITIL and SLA standards.
- Conducted installation, configuration, and maintenance of ESXi servers for secure deployment environments.
- Executed performance monitoring, patch management, and system health checks for critical RTA systems.
Sr. Systems Engineer
Roads & Transport Authority (RTA)
07.2018 - 08.2025
- Install and Manage Windows, RedHat/CentOS/Ubuntu servers, including performance tuning, patching, user administration, and system hardening, troubleshoot issues at OS, kernel, and service levels.
- Guaranteed high availability, security, and proactive monitoring for business-critical applications on Linux systems.
- Managed and updated cluster operators, machine sets, and node pools efficiently.
- Implemented and optimised resource quotas, limits, and requests for workloads.
- Oversaw management of persistent volumes (PVs), storage classes, and dynamic provisioning via CSI drivers.
- Optimised scheduling and resource distribution to enhance performance across clusters.
- Configured Ingress Controllers, routes, and load balancing for improved network traffic management.
- Established NetworkPolicies to enforce security segmentation within environments.
- Troubleshot network latency, DNS resolution, and service connectivity issues promptly.
- Integrated networking through Multus CNI to enhance VM connectivity.
- Created, modified, and deleted virtual machines using YAML, CLI, or OpenShift Console.
- Managed VM lifecycle operations including start, stop, pause, migrate, snapshot, and restore.
- Executed live migration along with hot plug/unplug of disks or NICs.
- Defined CPU and memory requests and limits for optimised VM performance.
- Lift-and-shift migration from VMware or bare metal to OpenShift.
- Plan, deploy, and upgrade OpenShift clusters
- Automate system tasks using Bash and Ansible for efficient and repeatable server management.
- Lead root cause analysis (RCA) and resolve complex OS, network, and application-level issues.
- System recovery and disaster recovery planning by resiliency, data restoration and DR drills.
- Virtualization & Cloud (VMware L3 & AWS L2)
- Deploy and manage VMware vSphere environments, including ESXi hosts, vCenter Server, virtual networking, storage, and HA/DRS clusters.
- Knowledge on cloud infrastructure on AWS including EC2, VPC, IAM, S3, and CloudWatch
- Configure and manage VMware Hypermetro cluster and VM migrations across vCenters.
- Create VM templates and optimize resource allocation.
Systems Engineer
CGI Group, India
09.2016 - 04.2018
- Deployed and managed containerized applications using Docker, orchestrating clusters with Kubernetes and OpenShift.
- Automated container lifecycle management and integrated CI/CD pipelines for efficiency.
- Oversaw resource allocation, autoscaling, deployments, updates, and rollbacks.
- Implemented RBAC and network policies to enhance security protocols.
- Managed container images through internal and external registries, maintaining image streams for build automation.
- Configured persistent storage via ODF, NFS, iSCSI, or cloud storage solutions.
- Administered VMware vSphere, vCenter, and ESXi clusters for optimal performance.
- Performed VM provisioning, template management, and resource optimisation in enterprise Linux environments.
- Implement configuration management using Ansible, Puppet, or Chef.
- Maintain and monitor system performance and resource utilization.
- Design and implement HA (High Availability) and DR (Disaster Recovery) strategies.
- Configure DRS, HA, snapshots, and storage integrations (vSAN, iSCSI, NFS).
- Troubleshoot performance issues related to virtual networking, storage, and compute.
- Plan and execute upgrades and patching of VMware environment.
- Led cross-functional team collaboration, fostering productive working environment.
- Created detailed reports on system health status, enabling proactive interventions.
- Investigated design failures in field to determine necessary corrections in future iterations.
Systems Analyst
Tata Communications, India
03.2014 - 09.2016
- Client: Multiple Clients
- Automation & Configuration Management L2 Level
- Ansible for automated server provisioning, configuration enforcement, patch management, and deployment workflows.
- Created reusable roles and modules to enforce standardized configurations across development, staging, and production environments.
- Manage and maintain VMware vSphere, vCenter, and ESXi environments.
- Perform VM provisioning, cloning, snapshots, and template management.
- Configure HA, DRS, vMotion, and Storage vMotion for workload resilience.
- Monitor resource utilization (CPU, Memory, Disk, Network) and optimize cluster performance.
- Plan and perform VMware upgrades, patching, and lifecycle management.
- Install, configure, and harden RHEL, CentOS, Ubuntu servers.
- Manage user accounts, permissions, services, cron jobs, and system daemons.
- Perform kernel updates, patching, and performance tuning.
- Troubleshoot issues related to boot, I/O, memory, filesystem, and networking.
- Manage LVM, RAID, and multipath storage configurations.
- Configure and maintain NFS, Samba, DNS, DHCP, SSH, and SMTP services.
- Automate administrative tasks using Bash / Python scripting.
- Implement and monitor system backups, logs, and security policies.
- Configure and manage Commvault backup policies, storage policies, and schedules.
- Perform regular backups, restores, and disaster recovery tests for Linux, Windows, and virtual machines.
- Manage Commvault Media Agents, Storage Libraries, and Clients.
- Monitor backup jobs and troubleshoot failures, slow performance, or missed backups.
- Validate data integrity and retention policies according to company compliance.
- Plan and execute DR drills and offsite replication strategies.
- Configure and troubleshoot IP addressing, VLANs, subnets, and routing on virtual or physical interfaces.
- Manage DNS, DHCP, and NTP services in coordination with network teams.
- Work with firewall teams to configure required ports for VMware, Commvault, and system access.
- Verify connectivity between virtual machines, hosts, and storage networks (SAN/NFS/iSCSI).
- Troubleshoot network performance issues (packet loss, latency, DNS resolution).
- Participate in capacity planning and topology reviews with infrastructure teams.
- Handle L3 escalations from service desk and lower-tier teams.
- Perform root cause analysis (RCA) and implement permanent fixes.
- Participate in change management processes for system upgrades and migrations.
- Document incident resolutions, known errors, and recovery steps.
- Support 24x7 infrastructure operations through on-call rotations (as required).
Datacenter Engineer
Hewlett Packard, India
Hyderabad, India
01.2012 - 11.2024
- Maintain inventory of physical servers, storage arrays, and networking equipment.
- Plan and execute hardware lifecycle management — procurement, installation, decommissioning.
- Coordinate with vendors (e.g., HPE, Dell, Cisco) for hardware support and firmware updates.
- Ensure optimal power, cooling, and rack space utilization within datacenter.
- Perform hardware diagnostics, firmware updates, and replacement (disks, NICs, HBAs, etc.).
- Support datacenter migrations, expansions, and DR site activities.
- Manage and maintain HP-UX servers (Itanium / PA-RISC).
- Perform LVM management, patching, kernel updates, and performance tuning.
- Manage Ignite-UX installations, recovery archives, and ServiceGuard clustering.
- Troubleshoot hardware, OS, and application-level issues.
- Coordinate with HPE support for hardware diagnostics and firmware updates.
Education
Bachelor of Engineering - Electronics and Communication Engineering
Anna university
Tamil Nadu, India 01.2007 - 01.2011
Skills
- Linux (RedHat, Centos, Ubuntu)
- Windows (2012 to 2022)
- Virtual (VMware, OpenShift)
- Containers (Kubernetes, Docker & OpenShift)
- DevOps (Ansible, Argo CD, Gitlab OpenShift Pipelines)
- Storage & Backup (Commvault, Ontap, NetApp)
- Cloud (AWS and Azure)
- Project Management
- Stack Observability
- ITSM
- Change & Incident management
- IT Security
- IT Operations & Maintenance
- Hardware & Asset Management
Certification
- RedHat Certified Engineer
- VMware Certified Engineer
- Certified Kubernetes Administrator
- Red Hat (DO188) OpenShift Containers with Podman
- AWS Solution architect
Languages
English – Fluent
Tamil – Fluent
Timeline
Sr. System Engineer
ITC Infotech, Client : Flydubai
08.2025 - Current
Sr. Systems Engineer
Roads & Transport Authority (RTA)
07.2018 - 08.2025
Systems Engineer
CGI Group, India
09.2016 - 04.2018
Systems Analyst
Tata Communications, India
03.2014 - 09.2016
Datacenter Engineer
Hewlett Packard, India
01.2012 - 11.2024
Bachelor of Engineering - Electronics and Communication Engineering
Anna university
01.2007 - 01.2011