Systems Administrator Infrastructure Engineer

John Prakash Reddy

Ph.no: 945-***-****

***********@*****.***

Linux Systems Administrator

SUMMARY

Accomplished Senior Linux Systems Administrator with over 12 years of hands-on experience in enterprise-level infrastructure management across RHEL (6/7/8/9), CentOS, OEL, and Windows Server (2012/2016/2019) environments. Demonstrated expertise in cloud infrastructure (AWS & GCP), including provisioning and managing EC2, VPC, S3, EBS, ELB, IAM autoscaling using Terraform. Good knowledge of containerization using Kubernetes and docker. Skilled in infrastructure automation, system hardening, and patch management using Red Hat Satellite, Ansible Tower, SCCM, WSUS, GIT, bitbucket, Jenkins, CI/CD

Strong background in deploying and supporting virtualization technologies - VMware ESXi (6.7/7.x) Xen, KVM hypervisors. Extensive experience managing physical and virtual servers (HP, Dell, Cisco UCS), datacenter operations, kernel upgrades, and security vulnerability remediation. Proficient in DNS, DHCP, NFS, HTTP, LDAP, RAID (0/1/5/10), LVM, SAN/NAS, multipath, LEAPP configurations.

Well-versed in DevOps tools such as Git, Bitbucket, Bamboo, Artifactory Jenkins, and configuration management with Ansible and Puppet. Automated server builds kickstart, backup solutions (Avamar, Bacula), and implemented firewall policies on FortiGate and Juniper. Strong scripting capabilities in Bash and ansible for automating routine administrative tasks.

Proven ability to manage high-priority incidents (P1), root cause analysis, and system performance tuning. Experienced in working in high-availability, mission-critical environments with 24x7 on-call support. Adept at documenting procedures, collaborating across teams, and continuously improving system reliability and security.

TECHNICAL SKILLS

Platforms: RHEL 6/7/8/9, CentOS, Ubuntu, Windows Server 2012–2022

Tools & Automation: Ansible, Terraform, Bash, Git, Jenkins, Bitbucket, CI/CD, Aspera

Virtualization & Cloud: VMware ESXi, KVM, GCP, AWS (EC2, S3, Kubernetes, docker), P2V/V2V

Monitoring: Prometheus, Grafana, Dynatrace, Nagios, Zabbix

Storage & Filesystems: SAN, NAS, LVM, XFS, ASM, RAID 0/1/5

Backup & Recovery: Avamar, Bacula

Security & Compliance: Red Hat Satellite, SCCM, Qualys, OS Hardening, CVE Fixes

Services: Apache, Tomcat, DNS, NFS, SSH, FTP, LDAP, DHCP, Splunk

Ticketing & Collaboration: Jira, ServiceNow, Raven, Espresso, Remedy, Confluence, Wiki

PROFESSIONAL EXPERIENCE

JPMorgan Chase Mphasis Plano, Texas Jan’24 – Present

Role: Infrastructure support engineer

Responsibilities:

Supported a high-performance Unix/Linux infrastructure of over 30,000 servers across production and non-production environments.

Managed multi-platform OS environments including RHEL 6–9, Ubuntu, CentOS, and Windows Server 2012–2022. Managed applications on a hybrid platform – physical, virtual and cloud-based

Successfully migrated and upgraded RHEL 7 in-place using LEAP, ensuring minimal downtime and full application compatibility. Troubleshooted and resolved issues related to LEAPP upgrade

Led data migration projects totaling over 40 PB of data between on-prem legacy data centers and AWS, utilizing IBM Aspera and AWS Postman for secure, high-speed transfers.

Provisioned and configured over 2000 RHEL and Windows servers across AWS and VMware environments, with dedicated 10Gbps NICs optimized for migration tasks.

Automated server builds and configuration management using Ansible, Terraform.

Deployed and managed Kubernetes clusters on Linux servers using tools Kubernetes, kubectl, ensuring high availability, consistent performance across dev and production environments.

Configured Kubernetes resources such as Deployments, Services, Ingress Controllers, Config Maps, and Secrets to support scalable and secure application environments.

Performed routine maintenance and upgrades on Kubernetes clusters, including patching nodes, updating control plane components. Maintained IaC for dev, staging, and prod environments.

Designed secure VPC architectures, implemented NAT Gateways, created IAM policies, and managed S3 buckets using AK/SK credentials for data access.

Migrated block storage, file and object storage from legacy data centers to AWS

Performed OS patching, kernel upgrades using ansible tower and Redhat satellite, and resolved security vulnerabilities using tools such as Qualys, McAfee, and Tanium.

Worked with SAN and NAS storage systems for LUN mapping, multipath configuration, RAID setup, and ASM disk creation for Oracle workloads.

Built and supported infrastructure for applications like Kafka, Splunk, Cassandra, Hadoop

Developed Bash shell scripts to automate administrative tasks, integrated with cron for scheduled execution, and version-controlled via Git/Bitbucket.

Deployed and managed monitoring solutions with Dynatrace, Prometheus and Grafana, enabling proactive alerts for system thresholds and resource utilization. Used Splunk for log analysis

Supported hardware installations and upgrades on bare-metal servers (HP, Dell), including iDRAC and ILO firmware and bios upgrades. Assisted physical server decom for server refresh project

Handled incidents and changes through Jira and ServiceNow. Implemented production changes during the weekend. Creating documentation and SOPs for internal knowledge base.

Provided 24/7 on-call support for production issues and collaborated with networking, storage, and security teams for incident resolution. Participated in and documented RCA for P1 incidents

Bank of Montreal Toronto, Canada May’22 – Oct’23

Role: Sr Linux-Systems Administrator

Responsibilities:

Installed and configured physical and virtual severs on RHEL 7.x, 8.x, and 9.x using Kickstart

Created and managed Windows Server 2012, 2016, and 2019 virtual machines in both test and production environments. Supported bank critical infrastructure running on hybrid platform

Integrated Kubernetes with cloud services (e.g., AWS EKS, Azure AKS), automating cluster provisioning and networking using Terraform and cloud-native tools.

Monitored Kubernetes performance, health, Linux-level metrics to detect & respond to issues proactively using Prometheus, Grafana. Troubleshot container & pod-level issues. Used Linux diagnostics (e.g top, netstat, journalctl) & logging solutions such as Fluentd and Loki.

Implemented comprehensive vulnerability management across on-premises and cloud assets

Identified and remediated CVEs through vulnerability scanning using Qualys

Applied OS hardening and deployed security patches on Linux systems via Red Hat Satellite and Ansible; performed Windows patching using SCCM.

Troubleshot patching issues and OS-level failures in complex enterprise environments.

Provided operational support for business-critical applications running on RHEL and Windows.

Managed SSL/TLS certificate renewals and deployments across Linux and Windows servers.

Participated in annual Disaster Recovery (DR) planning, testing, and execution activities.

Configured and maintained core Linux services such as Apache, Tomcat, MySQL, DNS BIND, NFS, FTP, LDAP, DHCP, SSH, firewalls, and more.

Administered LVM and XFS file systems, managed SAN and NFS storage provisioning and tuning.

Installed and upgraded Avamar for backup and recovery across production servers.

Maintained VMWare ESXi environments, including host patching, performance tuning, resource management, creating, troubleshooting and migrating VMs

Automated routine administrative tasks using shell Bash scripting; developed Ansible playbooks and deployed them via Ansible Tower. Troubleshoot and resolved all ansible tower related issues

Created support cases with Red Hat and Microsoft for critical issues and escalations.

Used Jira and ServiceNow to manage incidents, changes, and problem tickets.

Conducted root cause analysis & implemented long-term solutions for high-severity (P1) incidents.

Documented system config, procedures & SOP to support knowledge sharing and consistency.

Monitored server health, performance, and availability using Dynatrace in a 24/7 environment.

OANDA Toronto, Canada Nov’19 – May’22

Role: Platform engineer

Responsibilities:

Performed infrastructure administration for VMWare, Google Cloud (GCP), and Bare Metal servers including installation, configuration, monitoring, support, and troubleshooting.

Built and supported RHEL 6/7 and Windows Server 2012/2016 environments; handled OS installations, tuning, resource optimization, SAN/NAS mounts, and compliance remediation.

Conducted P2V and V2V migrations using VMware Converter; migrated VMs from KVM to VMware upgraded ESXi hosts and managed virtual infrastructure via vCenter.

Applied OS patches and security updates using Red Hat Satellite; and troubleshoot os-level issues across REHEL and windows environments

Configured RAID levels (0, 1, 5), ISCSI, IDE, SATA; created and managed LVMs, volume groups, and supported file systems. Worked on LVM file systems management

Integrated AD authentication using SSSD, managed user accounts, group policies, and sudo privileges on Linux and Windows systems. Joined Windows servers to domain

Configured LDAP-based authentication for Linux servers. Provided server login list to audit team

Provisioned Google Cloud Platform (GCP) resources using Terraform for infrastructure as code.

Managed GCP projects, VMs, IAM policies, Kubernetes and docker & other resources

Set up and maintained WSUS for centralized Windows server patch management.

Deployed and managed firewall rules on FortiGate and Juniper firewalls to control network traffic.

Automated repetitive tasks using Ansible playbooks; used Git and Bitbucket for version control.

Supported hardware lifecycle management for HP/Dell servers including BIOS and firmware upgrades (e.g., Dell R630, R640, R730xd). Worked with vendors for new hardware setup

Monitored infrastructure health using Zabbix and Prometheus, and responded to alerts.

Managed tasks, incidents, and support tickets via Jira; implemented weekend change requests via Raven. Resolved assigned support tasks within SLA; contributed to sprint planning and Agile

Decommissioned end-of-life hardware as per policy and supported hardware refresh projects.

Provided 24/7 on-call support, responding to Prometheus alerts, managing production incidents.

Worked flexible shifts to accommodate production changes, backups, and weekend deployments.

Bank of Montreal Toronto, Canada Jan'19 – Nov’19

Role: Linux application support Administrator

Responsibilities:

Installed, configured & managed Ansible Tower (v3.5+) across DEV, QA, and Prod environments.

Installed and maintained Redhat Enterprise Linux 6.x, 7.x, and CentOS systems.

Onboarded and integrated DevOps tools including Git, Bitbucket, Bamboo, and Ansible Tower.

Managed TCP/IP networking, firewall rules, and SELinux configurations.

Patched Linux servers using ansible tower & satellite and performed kernel upgrades to mitigate Meltdown & Spectre vulnerabilities. Worked with application team to resolve post upgrade issues

Automated multi-node deployments and configuration tasks using Ansible ad-hoc commands.

Handled storage and disk management tasks including LVM, PV/VG creation, file system tuning.

Tuned system performance and optimized configurations to ensure 99.9% availability.

Strengthened system and network security with proactive hardening and audit practices.

Troubleshot issues through log analysis, permissions management, and software audits.

Worked with ServiceNow, Jira, and BMO Accelerator for incident, task, and change management.

Provided 24/7 L3 on-call support and documented SOPs for operational consistency.

SCOTIA BANK Toronto, Canada Nov'17 – Jan’19

Role: Linux application support specialist

Responsibilities:

Installed and managed Ansible Tower across DEV, UAT, and Production environments.

Created Ansible templates, inventories, and managed access controls.

Used Git and Bitbucket for source control, including repo and branch creation.

Registered & maintained RHEL systems with Satellite 5 and 6; resolved registration & sync issues.

Installed, and supported RHEL 5.x–7.x on various hardware platforms (IBM, HP, Cisco UCS, Zen).

Performed OS patching & kernel upgrades to mitigate security vulnerabilities (Meltdown/Spectre).

Automated server provisioning and maintenance using Ansible playbooks and Kickstart.

Coordinated with hardware vendors and Red Hat support to resolve system and OS issues.

Configured and managed LVMs, file systems, and storage permissions.

Ensured Linux systems met compliance and security standards.

Maintained and supported Tomcat and Apache application servers.

Provided 24/7 on-call Linux support in rotation. Participated in RCA calls for p1 incidents

Created documentation for troubleshooting steps and testing procedures.

Used ServiceNow for incident, task, and change management.

APPLE, Sunnyvale, CA July’14- July’17

Role: Linux Administrator

Responsibilities

Installed and configured Linux servers (OEL&RHEL 6.x/7.x) on HP and IBM hardware (ProLiant, IBM M3/M4, ZT). Installed applications and configured filesystem as per the project requirement

Used kickstart for auto installation of 100’s of Linux servers

Set up hardware, services, file systems, and storage according to project specifications.

Collaborated with networking teams for VLAN creation, ACL implementation, NIC configurations.

Configured RAID (0,1,5,1+0) and managed LUNs, multipath, and logical volumes.

Upgraded firmware on IBM Blade chassis (AMM) and HP ILO, Dell iDRAC

Experienced working with IBM XEON blade servers, troubleshooting VMs on blade server

Performed kernel upgrades and security patching on Linux servers.

Managed and monitored server performance using tools like Sar, Iostat, VMstat, and MPstat across development, test, and production environments.

Used Jenkins for Continuous Integration and Continuous Deployment (CI/CD).

Built KVM & XEN hypervisors and integrated them into the private cloud infrastructure.

Managed virtual machine resources, adding or adjusting resources as needed.

Administered networking services such as NIS, NFS, SAMBA, LDAP, SSH, SNMP, DNS, DHCP.

Supported Autosys migration from AIX to Linux, troubleshooting and upgrading AutoSys AE/WCC.

Managed cron jobs for application accounts and backup systems.

Utilized ticketing tools (Espresso, Remedy, Central Station) for incident and change management.

Coordinated hardware support with IBM/HP for resolution of hardware issues.

Provided L2, 24/7 on-call support as per schedule.

FIFTH THIRD BANK, Westlake, OH May’13 – June’14

Role: Linux administrator

Responsibilities:

Installed, configured, and upgraded OEL 5.x/6.x and RedHat Linux 4/5/6 using kickstart.

Created hardware/software RAID configurations based on hardware and application requirements.

Worked with automation tools (Puppet, Ansible) and wrote basic playbooks.

Configured and managed SELinux, Linux firewalls, and IPTABLES for port management.

Led migration of Linux servers and SAN storage across data centers.

Monitored system performance, tuned the kernel for enhanced performance.

Troubleshot user, application, and hardware issues, including access and permissions.

Adjusted kernel parameters (huge pages, NUMA) per DBA requirements and fixed server boot issues. Set user disk quotas and guided cleanup of unused data.

Provided weekly on-call support, monitored alerts, and resolved threshold issues.

Participated in P1 ticket troubleshooting, including root cause analysis (RCA).

Supported Dev, Test, and Prod environments, ensuring compliance with D2P change management

Documented procedures, processes, and provided knowledge transfer (KT) to new team members.

PNC BANK, Pittsburgh, PA Oct’11 – Apr’13

Role: LINUX Administrator

Responsibilities:

Installed, configured and upgraded RedHat Enterprise Linux (4.2, 5.2, 5.3, 5.6).

Managed user accounts, profiles, permissions, security rights, and disk/process monitoring.

Configured and maintained DNS, LDAP, NFS, NIS, and NIS+ on RedHat Linux.

Installed and configured Oracle 10g on Linux/Unix systems.

Automated server provisioning using Kickstart (RHEL 6) and Jumpstart (Solaris 10).

Configured system imaging tools (Ghost, System Imager) for data center migration.

Set up yum repositories for package installation and centralized patching.

Managed SELinux, Linux firewalls, and iptables.

Configured and managed ESX VMs with Virtual Center and VI Client.

Performed kernel tuning, server hardening, and resource control via limits.conf.

Managed disk using LVM, configured disk mirroring and striping.

Documented data migration procedures on production servers.

Provided 24/7 on-call support and ensured system security on RedHat Linux.

EDUCATION

Master of Science in computer networking - University of Bedfordshire, England – 2009

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