Was Administrator L2

Experience - 3+ years

Location- Mumbai

Client - SBI & MSI Global.

Shifts - 6 Days Working with Rotational Shifts.

Work from Office Only.

Roles & Responsibilities:

Application Servers: IBM WebSphere Application Server (WAS) ND, Tomcat, JBoss,

Web Servers: IBM HTTP Server (IHS), Apache, Nginx

Operating Systems: AIX, Linux (RedHat/SuSE), Windows Server

Tools & Technologies: J2EE, JDBC, JMS, LDAP, SSL, WSAdmin, Shell Scripting,

Installed and configured WebSphere Application Server and IBM HTTP Server (IHS).

Configured Global Security, SSL certificates, and integrated with LDAP for user authentication.

Migrated applications from older WAS versions to [Target Version] and applied relevant fix packs and refresh packs.

Created user roles and access controls to secure critical server resources.

Provided 24/7 on-call production support and participated in root cause analysis for system outages.

Technical Experience

• Red Hat Enterprise Linux (RHEL)

• Red Hat JBoss EAP

• IBM WebSphere Application Server

• Apache HTTP Server

• IBM HTTP Server (IHS)

• SSL/TLS Certificate Management

• OpenSSL, Key tool, Java KeyStore (JKS), PKCS12

• Linux and Aix Performance Tuning

• JVM Performance Tuning

• Application Deployment & Middleware Administration

• Incident, Problem & Change Management (ITIL)

• Disaster Recovery Planning

• Production Support

• Monitoring & Log Analysis

• Root Cause Analysis (RCA)

• Capacity Planning

Linux & Middleware infrastructure Engineer (L2) roles and Responsibilities.

• Administer, maintain, and troubleshoot large-scale Red Hat Enterprise Linux (RHEL) production environments with high availability.

• Design, implement, and manage enterprise middleware platforms including Red Hat JBoss EAP, IBM WebSphere Application Server, Apache HTTP Server, and IBM HTTP Server (IHS).

• Lead production support activities, ensuring maximum service availability and adherence to SLA commitments.

• Perform advanced troubleshooting of middleware, application, operating system, and network-related issues using systematic root cause analysis methodologies.

• Architect, implement, and optimize SSL/TLS certificate lifecycle management across Apache, JBoss, WebSphere, and IHS environments. • Generate Certificate Signing Requests (CSR), manage Java Keystores (JKS), PKCS12, trust stores, and automate certificate renewal processes.

• Configure and optimize WebSphere cells, clusters, deployment managers, nodes, JVMs, data sources, connection pools, JMS resources, and security settings.

• Administer JBoss standalone and domain environments, including server groups, deployments, clustering, data source configuration, and performance tuning.

• Configure and manage Apache HTTP Server, reverse proxy, load balancing, virtual hosts, URL rewriting, and SSL termination.

• Perform middleware performance tuning, JVM optimization, heap analysis, garbage collection tuning, thread analysis, and memory leak investigation.

• Analyse application dumps, thread dumps, heap dumps, GC logs, and system performance metrics to resolve complex production issues.

• Troubleshoot database connectivity, connection pool exhaustion, JDBC data source issues, transaction failures, and application performance bottlenecks.

• Lead major incident management (P1/P2), coordinate cross-functional technical teams, and ensure timely service restoration.

• Perform capacity planning, infrastructure optimization, and proactive performance improvement initiatives.

• Plan and execute application deployments, middleware upgrades, migrations, patching, rollback strategies, and post-implementation validation.

• Perform vulnerability remediation, OS hardening, middleware security configuration, and compliance activities.

• Review infrastructure architecture and recommend improvements for scalability, performance, resilience, and security.

• Design Disaster Recovery (DR) strategies and execute DR drills with successful failover and failback validation.

• Implement and maintain monitoring solutions for infrastructure, middleware, and application health.

• Perform log analysis using operating system and middleware logs to identify recurring issues and recommend permanent fixes.

• Develop Standard Operating Procedures (SOPs), Knowledge Base (KB) articles, implementation plans, and technical documentation.

• Prepare Root Cause Analysis (RCA) reports with preventive and corrective action plans.

• Participate in Change Advisory Board (CAB) meetings and execute production changes following ITIL best practices.

• Mentor L1 and L2 engineers by providing technical guidance and knowledge-sharing sessions.

• Drive continuous service improvement initiatives by identifying operational gaps and implementing process improvements.

• Manage production, UAT, DR, and pre-production environments while ensuring configuration consistency across all environments.

• Perform Linux kernel parameter tuning, filesystem management, user administration, service management, package management, and server lifecycle activities.

• Support high-availability and clustered environments with minimal downtime during planned and unplanned maintenance.

• Coordinate with clients during maintenance windows, production releases, audits, and critical incident resolution.

Interested Candidate kindly share me their updated resume on [email protected] Or Connect on- 8655949151