SREEJESH SREEKUMAR

Summary

Technical Lead and subject matter expert with proven experience in software development and production support within telecom and IT environments. Specialises in containerisation technologies, Red Hat Linux, Vertica databases, and packet core architecture, with strong skills in troubleshooting complex application issues using C/C++ logs. Manages project timelines and resources effectively, driving innovation through advanced technical solutions and optimising system performance.

Overview

Certification

years of professional experience

Work History

Technical Lead /SME

Savantis Solutions- NetScout Systems,Inc.

Mumbai

01.2023 - 09.2026

Led technical teams in developing and deploying software solutions, streamlining processes and improving project delivery timelines.
Managed project timelines and resources, ensuring timely delivery within budget constraints.
Proficient in containerization technologies such as Docker, demonstrating the ability to package, distribute, and deploy applications efficiently across various environments.
Provided L2/L3 production support for distributed telecom applications running on Linux and Docker environments.
Experience in Integration Deployment and Testing with NETSCOUT telecom applications (nBA, nG1, nSA etc)
Supported Technical Consultants onsite by providing technical expertise and backup during project implementation.
Conducted end-to-end troubleshooting of application outages, analysing application, database, and OS logs to restore functionality swiftly.
Investigated application crashes using C/C++ logs, core dumps, stack traces, and GDB analysis.
Performed root cause analysis (RCA) for critical production incidents and implemented permanent corrective actions.
Supported application deployments, upgrades, hotfix installations, and rollback activities with minimal downtime.
Coordinated with development, database, and infrastructure teams during major incidents and production releases.
Performed health checks, preventive maintenance, and capacity monitoring to ensure application availability.
Security vulnerability assessment
Analysed CVEs to identify vulnerabilities and implemented effective mitigation strategies, enhancing overall system security.
Administered Vertica clustered database environments supporting high-volume telecom analytics.
Performed Vertica cluster recovery after node failures, database outages, and hardware issues.
Executed Vertica scratch recovery procedures to restore failed database nodes.
Brought failed Vertica nodes back into the cluster while maintaining database consistency.
Executed DBA role for internal testing and development environments, ensuring database integrity and availability.

Senior Technical Analyst

Innovation UAE(Etisalat UAE)

United Arab Emirates

02.2014 - 12.2022

Provided analytical and technical solutions for incidents raised by enterprise business customers globally, enhancing service reliability.
Managed incidents, problems, and change requests per ITIL best practices, ensuring compliance with service level agreements.
Monitored, recorded, analysed, and reported on activities, trends, and results, providing actionable recommendations to enhance IT Operations.
Monitored and analyzed packet core KPIs, alarms, and performance metrics, proactively identifying network degradation and service-impacting events.
Investigated call setup failures, VoLTE registration issues, and data session drops using telecom monitoring and diagnostic tools.
Performed packet trace analysis using Wireshark and telecom protocol analyzers to identify signaling and data path anomalies.
Supported integration, commissioning, and acceptance testing of packet core network components during deployment and upgrade activities.
Oversaw ICT systems to comply with established ISO20000 and ISO27001 processes and ITIL best practices.
Monitored system performance to identify weaknesses, bottlenecks, and inefficiencies, contributing to improved operational effectiveness.
Gained experience with UDC, UPG, HSS, and HLR technologies, focusing on Ericsson UDC solutions and virtualisation of Ericsson PC systems.
Evaluated, analyzed, and set up PC/Mobile-based software products.
Provide all required documentation including standards, configurations, and diagrams.
Oversaw billing processes for Etisalat GSM services, ensuring accurate invoicing and customer satisfaction.
Etisalat UAE

Technical Support Engineer

IBM INDIA PVT LTD

Banglore

12.2011 - 12.2012

Respond promptly to incidents, investigate & provide temporary &/or permanent resolution of incidents escalated. Provide timely status updates to relevant parties.
Demonstrated strong troubleshooting and analytical skills in resolving technical issues.
Addressed customer queries and concerns, delivering effective solutions to enhance user experience.
Conducted remote sessions to troubleshoot and resolve network issues. and solving the network issues.
Supported users and managed daily operations to ensure system reliability and user satisfaction.
Monitor & measure the performance & availability of systems proactively; implement corrective actions identified to improve performance & availability.
Handling escalation, assigning the ticket to concerned team.
Plan, design, install, test & implement systems in accordance to specifications & service level. Where relevant, perform the necessary system programming & configuration.
Installation, Configuration and Management of Linux Server in RHEL 5.5 along with virtualisation.
Installation has been done by using PXE, Kickstart and server installation method.
Administration of Apache, Samba, DHCP, DNS, Mail and Proxy Servers.
User Management, Command Line utilities, SUDO, Software RAID, Firewalls configuration (TCP wrappers, iptables).
Installation and upgradation of OS, kernel and additional Packages using RPM and YUM.
Performance Monitoring of servers and taking backups.
Strong knowledge in billing applications and systems with SQL and Java based queries.
Documented troubleshooting processes and problem resolutions to improve knowledge sharing and operational efficiency.
Handle email queries and respond in a timely- manner.
Maintain installation and configuration procedures.

Education

B.E - Computer Science and Engieering

Anna University

Chennai, TN

01-2010

Skills

Docker containers
Probing technology
Kafka messaging
Red Hat Linux
C
C
PL/SQL expertise

Vertica database
Monitoring tools
Call flow analysis
Packet core architecture
Problem solving
Leadership and team management