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Subrahmanyam Takkella

@subrahmanyamtakkella

Senior Linux System Administrator at HSBC who patched RHEL servers in a Hadoop cluster and managed VMware infrastructure.

India

Message

At HSBC Software Development India Pvt. Ltd., I patched RHEL servers in a Hadoop cluster and resolved post-patching boot, resource, repository, security, stability, and network issues. I also managed VMware vCenter, ESXi hosts, clusters, and related infrastructure.

Earlier, at APPSFORBB.COM LLP, I built company infrastructure from the ground up, including Ubuntu server and desktop installation, network setup, and application deployments. Across my systems engineering roles, I’ve administered Linux environments on physical servers, VMware, AWS, and Oracle Cloud Infrastructure, and I hold an AWS Certified Solutions Architect – Associate certification.

Experience

Work history, roles, and key accomplishments

Senior Systems Engineer

HSBC Software Development India Pvt. Ltd.

Jun 2025 - Sep 2025 (3 months)

Patched RHEL servers in a Hadoop cluster environment and resolved post-patching issues. Administered NFS, disk management, LVM, and filesystem troubleshooting, and managed VMware vCenter, ESXi hosts, clusters, and datastores.

RHEL Hadoop NFS LVM VCenter VMware ESXi DRS Security Hardening Vulnerability Monitoring Databases

Senior Systems Engineer

Cisco Systems India Pvt. Ltd.

Mar 2023 - May 2025 (2 years 2 months)

Installed, configured, and maintained RHEL, Amazon Linux, and Ubuntu servers on VMware, AWS, and physical infrastructure. Managed LVM, filesystems, RAID, SAN/storage, and performed performance troubleshooting and root-cause analysis.

RHEL Amazon Linux Ubuntu VMWare AWS LVM RAID SAN NFS SAMBA DNS SSL Network Bonding SSSD PAM Performance Optimization Root Cause Analysis

Associate Lead Systems Engineer

Infolob Solutions India Pvt. Ltd.

May 2022 - Feb 2023 (9 months)

Independently maintained 80+ Linux servers supporting 24/7 operations across Oracle Cloud Infrastructure, VMware, Oracle VM Manager, and bare-metal environments. Applied system-hardening practices and collaborated with cross-functional teams to ensure production availability.

Linux Administrator Oracle Cloud Infrastructure VMWare Oracle VM Manager System Hardening Patching Performance Monitoring

Senior Systems Engineer

Accenture

Sep 2021 - Apr 2022 (7 months)

Installed, configured, and maintained middleware including WebSphere, JBoss, Apache, Tomcat, and IBM HTTP Server. Monitored middleware performance, troubleshot issues, and supported application deployments and integrations.

Websphere JBoss Apache Tomcat IBM HTTP Server Middleware Administration Performance Monitoring Troubleshooting Patching

Senior Systems Engineer

OSI Digital Pvt. Ltd.

Nov 2019 - May 2021 (1 year 6 months)

Administered Red Hat Linux, Oracle Linux, CentOS, and Fedora, and implemented VMware ESX environments. Managed LVM, filesystem growth, Kickstart, NFS, and storage, and supported AWS EC2, S3, EBS, and VPC activities.

RedHat Linux Oracle Linux CentOS Fedora VMware ESX LVM NFS Kickstarts EC2 S3 EBS VPC Performance Monitoring

Linux System Administrator II

Black Knight Financial Services India Pvt. Ltd.

Mar 2019 - Nov 2019 (8 months)

Performed monthly Linux patching and Java installation/upgrades based on application requirements. Used IBM UrbanCode Deploy to support application deployment automation and troubleshoot deployment issues.

Linux Java IBM Urban Code Deploy Application Deployment Troubleshooting

Senior Consultant

Techwave Consulting India Pvt. Ltd.

May 2017 - Sep 2018 (1 year 4 months)

Performed production OS patching and upgrades using Red Hat Satellite. Supported disaster-recovery drills, system failover validation, and administered Linux/UNIX/Solaris systems including performance monitoring and automation.

Red Hat Satellite Patching Disaster Recovery Linux Unix Solaris Performance Monitoring Automation Apache Nginx MySQL MongoDB Tomcat SSL FreeNAS Active Directory

Linux Systems Administrator

APPSFORBB.COM LLP

Jul 2013 - Feb 2016 (2 years 7 months)

Built company infrastructure from the ground up, including Ubuntu server and desktop installation, network setup, and application deployments. Administered CentOS and Ubuntu systems, user permissions, system hardening, and network services.