Sunit Kumar Mishra

Fiserv – Resiliency & Recovery Assessment Project

• Led a multi-layer resiliency and recovery assessment for mission-critical financial services infrastructure covering PCF (Tanzu), Redis Enterprise, Apigee SaaS/ApigeeX, and IBM DataPower.
• Analyzed dual-site active-active architecture across Omaha and Chandler data centers, identifying resiliency gaps in networking, compute, storage, middleware, and database layers.
• Conducted deep-dive assessments aligned with ISO 22301, NIST SP 800-34, and ITIL frameworks to validate disaster recovery readiness and high-availability strategies.
• Collaborated with infrastructure, application, and security teams to review configurations, BOSH tasks/manifests, traffic routing (Apigee/DataPower), and Redis CRDB replication.
• Delivered executive-level reports and presentations highlighting SPOFs, monitoring/observability gaps, and remediation strategies, ensuring alignment with industry best practices.
• Provided recommendations on autoscaling, failover, configuration drift management, and monitoring improvements using tools such as Splunk, Dynatrace, and Moogsoft.
• Key Achievements:
  Identified critical resiliency gaps that could impact transaction failover, session affinity, and active-active stability.
• Recommended practical, non-disruptive remediation steps, improving system availability, observability, and recovery posture.
  Strengthened Fiserv’s infrastructure resiliency strategy, supporting long-term business continuity and regulatory compliance.

• Continued to anchor delivery on middleware technologies (WebLogic, SOA/OSB, Tomcat, Apache), ensuring application stability, security, and scalability.
• Participated in resiliency and recovery assessments involving AWS cloud components, gaining exposure to cloud-native design principles.
• Collaborated with cloud/infra teams to review failover, monitoring, and configuration gaps, ensuring integration with Mercer’s middleware stack.
• Contributed to client-facing resiliency assessment reports, mapping findings to ISO 22301, NIST SP 800-34, and ITIL frameworks.
• Assisted in migration readiness discussions, providing a middleware perspective for applications being evaluated for cloud enablement.

Key Contributions:

• Positioned as a middleware SME with cloud resiliency exposure, supporting Mercer’s journey from legacy to hybrid cloud.
• Helped modernize resiliency practices by embedding middleware best practices into broader cloud and infra assessments.

• Focused operations and technical Support for SEI platform applications, managing application infrastructure and middleware tech stack weblogic, FMW components like SOA/OSB, Apache, Nginx, Tomcat, Informatica
• Used Devops tools such as Jenkins, Ansible, Docker, git, harbor, rancher, Kubernetes to cater infra requirements
• Managing technical team providing middleware support to SEI end clients as a techno functional manager
• Tracking results providing continual improvement on services delivered, scaling along with client for their changing needs
• Mentoring team on technical issues, creating SOPs for newly reported opportunities, smoothening daily operations
• Troubleshooting/Fixing application/environmental issues and providing RCA
• Running operations and support for over 2k developers over 50 environments need fulltime environment availability for upcoming production cycles, we are running 23k daily deployment streams and night work jobs at its best for SEI which has tight SLAs, and we are achieving 99.9 percent of timelines. Providing technical justification for delays encountered

• Worked with Product Development Infrastructure Team (PDIT) supporting applications designated to Oracle Global Sales Engineering team.
• Managed regular application releases, prepared technical maintenance plans and executed per business needs of complex infrastructure
• Built GSE application environments commissioning, maintaining, decommissioning, release management, configuration management of websites/applications and adhering to policy and procedures.
• Migrated existing FMW 11g applications to FMW 12c across the fleet
• Ensured meaningful service and operational performance measures are in place and delivery to target Drive focused, effective incident and problem detection, management, root cause and resolution
• Worked closely with Server, Network and Storage Team to provision new VM’s, subnet’s & file systems
• Setup application and Infrastructure monitoring using Oracle Enterprise Manager
• Security updates and vulnerability management
• Plan, implement and test disaster recovery options to ensure business continuity in the event of a failure on IT related services or infrastructure
• Creating technical documents on severe issues enhancing knowledge base to team
• Oversee the administration and maintenance of IT infrastructure. Manage, control and monitor the installation, operation and maintenance of IT infrastructure.
• Work experience on BIGIP basic Administration configuring pools, writing redirect rules, configuring cookies to be accessed by backend Oracle Products
• SSO configuration using IAM tech stack
• Troubleshooted integration issues between ICS and GSE applications
• Automated application infrastructure requirements using shell scripts

• New build and configuration changes in the development, UAT and production environments.
• Troubleshooting application and WebLogic/tomcat/JBoss related issue.
• Release management and deployment process.
• Performance Tuning of mission critical applications deployed in WebLogic/Tomcat
• Analyze thread dumps and heap dumps.
• SSL certificate management in WebLogic, tomcat and Apache.
• Advanced Shell Scripting for automating batch processes.
• Scripting with WLST for automating deployment, managing server lifecycle and creating resources.
• Remediate vulnerabilities
• Cox Telemedia

• Involved with Customer Interaction to their Project Architecture, design
• Installed/configured/monitored Oracle WebLogic Server 8.x, 9.x, 10.x, 11g and 12c reverse proxy configuration for upcoming client requirements
• Participated in Application Deployment during releases and coordinating with dev team
• Extensively explored Shell and WLST automating creating and managing domains and runtime configurations
• Troubleshooting emerging application issues, from WebLogic configuration perspective
• Maintaining the Oracle tech stack latest applying security vulnerability patches
• Solving Complex problem related to the WebLogic, performance tuning and performing root cause analysis

• Carried out technical analysis Oracle’s customer problems and provided solutions to them on WebLogic Server, analyzing WebLogic log files, recommended the remedy based on error logs and business logic
• Involved in Customer Interaction with their Project Architecture, design, development and deployment and configuration specific issues
• Performed troubleshooting by analyzing log and configuration files and by using documentation and known error database
• Reproducing and reporting WebLogic bugs to engineering team
• Solving Complex problem related to the WebLogic installation, configuration, performance tuning
• Performing root cause analysis to critical issues for Oracle global customers
• Providing support for Runtime problem on Production servers, such as Server Hang, Server Crash, OOM Errors and other configuration and Performance issues

• Software developer, catered in-house JEE web applications development