Mahesh S

I am a seasoned Middleware Specialist with over 11 years of hands-on experience in administering, configuring, and optimizing enterprise application servers, including Apache Tomcat, IBM WebSphere, JBoss EAP, WildFly, and Oracle WebLogic. My career spans large-scale environments across financial, insurance, and technology sectors, where I have successfully delivered high-availability, secure, and scalable solutions.

My expertise covers the full application server lifecycle—installation, configuration, clustering, patching, upgrades, performance tuning, and troubleshooting. I am highly proficient in deploying Java-based applications (WAR/EAR/JAR), automating deployment processes, and integrating middleware with databases, LDAP directories, and load balancers like F5.

I have deep experience in JVM tuning, garbage collection analysis, connection pooling, and thread optimization to ensure optimal application performance. Security is a core focus, with proven success implementing SSL/TLS encryption, secure authentication, authorization models, and integrating SSO solutions (SiteMinder, SAML, SPNEGO, Shibboleth).

In addition to middleware administration, I have worked extensively with Business Process Management (BPM) platforms such as IBM BPM, Camunda, and Appian—supporting installations, upgrades, performance tuning, and integration testing. My background also includes experience in CI/CD automation using Jenkins, Git, Bitbucket, Ansible, and IBM UrbanCode, as well as infrastructure administration on Linux, Windows, AIX, and AWS.

I am well-versed in troubleshooting complex production issues—such as memory leaks, slow response times, crashes, and integration failures—using tools like Splunk, Dynatrace, AppDynamics, Wily Introscope, and ITRS Geneos. My approach involves proactive monitoring, capacity planning, and performance benchmarking to anticipate issues before they impact end users.

Collaboration has been a key part of my success, working closely with cross-functional teams, mentoring junior engineers, and contributing to ITIL-aligned change management processes. I have also led major upgrades, migrations, and disaster recovery planning with zero or minimal downtime.

As a recognized SME in Tomcat and WebSphere, I provide strategic recommendations, architectural guidance, and technical leadership to ensure business-critical applications remain stable, secure, and high-performing. I take pride in delivering solutions that align with organizational goals while maintaining compliance with industry standards.