Infrastructure Systems Engineer III

Key Responsibilities

• Install, configure, administer, upgrade, and maintain IBM WebSphere Application Server (WAS) environments.
• Manage WebSphere profiles, nodes, deployment managers, clusters, JVMs, virtual hosts, JDBC providers, data sources, connection pools, and shared libraries.
• Perform application deployments, configuration changes, JVM restarts, cluster operations, and production releases.
• Configure and support IBM WebSphere Portal Server, including portal clusters, application deployments, configuration, security integration, and troubleshooting.
• Administer and support IBM Business Automation Workflow (BAW) environments.
• Support BAW application deployments, process applications, workflow services, environment configuration, and production issues.
• Configure SSL/TLS certificates, HTTPS, virtual hosts, routing, load balancing, and WebSphere plug-in configurations.
• Troubleshoot WebSphere, Portal, and BAW connectivity and application issues.
• Integrate middleware platforms with enterprise Identity and Access Management (IAM) solutions.
• Manage SSL certificates, keystores, truststores, certificate renewals, and secure communication between middleware components.
• Create and maintain Jenkins CI/CD pipelines for middleware deployments and operational automation.
• Automate application deployments, configuration changes, server restarts, and routine administrative activities using Jenkins and scripting.
• Develop and maintain Shell, Python, Jython/Wsadmin, or PowerShell scripts for middleware automation.
• Perform middleware patching, fix-pack installation, version upgrades, vulnerability remediation, and security hardening.
• Monitor JVM health, heap utilization, thread pools, JDBC connection pools, CPU, memory, application response times, and system performance.
• Analyze logs, JVM dumps, heap dumps, thread dumps, SystemOut/SystemErr logs, and application logs.
• Troubleshoot production incidents involving application availability, JVM hangs, OutOfMemory conditions, high CPU, connection issues, SSL errors, and deployment failures.
• Perform performance tuning and capacity planning for middleware environments.
• Configure high availability, clustering, failover, session persistence, and load balancing.
• Maintain technical documentation, architecture diagrams, installation procedures, operational runbooks, and troubleshooting guides.
• Coordinate with application development, infrastructure, database, security, networking, DevOps, and production support teams.
• Participate in production releases, change management, incident management, problem management, and root-cause analysis.
• Provide on-call and production support for critical enterprise middleware applications.
• Be willing to work after hours to support production maintenance windows.

Required Skills

• Strong hands-on experience with IBM WebSphere Application Server.
• Experience with IBM WebSphere Portal Server.
• Experience administering IBM Business Automation Workflow (BAW).
• Strong knowledge of IBM HTTP Server (IHS) Experience with IAM, LDAP, Active Directory, SSO, authentication, and authorization.
• Experience building and maintaining Jenkins CI/CD pipelines.
• Strong understanding of WebSphere clustering and high-availability architecture.
• Experience with SSL/TLS, certificates, keystores, and truststores.
• Experience with application deployment and middleware configuration.
• Experience with WebSphere wsadmin and Jython scripting Shell/Unix/Linux scripting knowledge.
• Strong Linux/Unix administration skills Knowledge of JVM configuration, garbage collection, heap analysis, and performance tuning.
• Experience troubleshooting enterprise production environments.
• Knowledge of HTTP/HTTPS, TCP/IP, DNS, load balancers, firewalls, and networking concepts.
• Experience with middleware patching, upgrades, vulnerability remediation, and security hardening.
• Familiarity with ITIL processes including incident, change, and problem management.

Preferred Skills

• IBM WebSphere Application Server 8.5/9.x
• IBM Business Automation Workflow 20.x/21.x/23.x/24.x
• IBM WebSphere Portal / HCL Digital Experience
• Experience IBM HTTP Server 8.5/9.x
• Integration with IBM IAM and IBM TIM
• WebSphere Liberty experience
• Git/GitHub/Bitbucket experience
• Ansible or other infrastructure automation tools
• Splunk or similar monitoring/log-analysis tools like Dynatrace, AppDynamics, or other APM tools
• AWS or Azure cloud experience
• Containerization experience with Docker/Kubernetes/OpenShift
• DevOps and CI/CD implementation experience

Experience

• 10 yrs of Middleware Administration/Engineering experience preferred
• 5+ yrs of hands-on IBM WebSphere Application Server administration
• 5+ yrs of hands-on IBM WebSphere Portal Server administration.
• 5+ yrs of hands-on IBM WebSphere Process Server Or IBM BAW
• 3 yrs of hands-on integration with IBM IAM, IBM TIM and LDAP
• Strong production support experience in large-scale, highly available enterprise environments.

Education

• Bachelor’s degree in computer science, Information Technology, Engineering, or a related field, or equivalent professional experience.