United States
As an IT professional with 19+ years of experience in mainframe systems engineering and enterprise middleware, I specialize in building and sustaining resilient, high-performance platforms for mission-critical financial and public-sector systems. My career has centered on supporting large-scale IBM z/OS environments, where reliability, security, and compliance are paramount. I bring extensive expertise in IBM MQ administration, configuration, and tuning within complex Sysplex infrastructures—supporting multi-queue manager environments, CICS integration, and high-volume transactional workloads. Over the years, I have designed high availability solutions, performance optimization strategies, disaster recovery frameworks, and capacity planning models to ensure seamless operations across distributed and mainframe environments. My technical foundation spans IBM mainframe technologies (zEnterprise, CICS TS, DB2, IMS, VSAM) and Software AG products (Adabas, Natural, Predict, tcVision), with strong programming proficiency in JCL, REXX, COBOL, and Assembler. I am adept at leveraging a wide range of monitoring and debugging tools—including Sysview for MQ, CA-Neumics Analyzer, OMEGAMON, Strobe, and File-Aid—to troubleshoot complex issues, optimize workloads, and maintain system stability. A key focus of my work has been enabling migration and modernization initiatives, bridging mainframe workloads with open systems, and supporting application developers through MQ integration in both batch and CICS environments. I collaborate closely with distributed MQ teams, application developers, and infrastructure engineers, ensuring secure, compliant, and scalable messaging solutions that align with enterprise and regulatory standards. Recognized for problem determination, IBM support coordination, and cross-team collaboration, I excel at translating technical challenges into solutions that enhance stability and enable business continuity. Whether tuning MQ performance, designing DR strategies, or mentoring teams, I remain focused on delivering secure, high-availability enterprise platforms that support global operations.
Hands-on experience configuring and managing IBM MQ subsystems on z/OS in large-scale Sysplex environments, including multi-queue managers, queue-sharing groups, and shared queues. Design and maintain MQ objects such as local/remote queues, channels, transmission queues, and listeners to support high-volume transactional applications. Enable MQ data sharing via Coupling Facility (CF) structures for high availability and workload balancing. Support MQ in CICS and Batch environments, including trigger monitor tuning, MQI wrapper enhancements, and collaboration with application teams. Develop automation scripts and JCL procedures for administration, log analysis, and reporting. Perform performance tuning and capacity planning using Sysview for MQ, CA-NeuMICS Analyzer, SMF data, and in-house tools. Lead SMP/E-based MQ upgrades, fix packs, and maintenance, while managing change control and coordinating production deployments. Participate in Disaster Recovery (DR) testing, implementing channel failover, queue manager restarts, and backup/recovery strategies. Integrate RACF/CA-Top Secret security, SSL/TLS, and MQ channel security exits to enforce compliance. Support cross-platform messaging solutions, including Kafka and Confluent Connectors for real-time data streaming. Deep understanding of z/OS internals (APF libraries, LPA lists, Linklist management, VSAM). Provide 24x7 on-call support, incident resolution, root cause analysis, and IBM Support coordination. Document runbooks, installation guides, and troubleshooting procedures, while mentoring teams and collaborating with developers, architects, and cloud engineers to maintain secure, high-availability enterprise messaging platforms.
Developed and maintained complex COBOL batch and CICS online applications in a high-volume production environment, optimizing transaction processing and user interfaces via BMS MAPs. Designed and executed DB2 programs with optimized SQL and cursor management, alongside JCL, PROCs, and PARMs for scheduled batch jobs. Managed VSAM datasets with IDCAMS, File-Aid, and advanced DFSORT/ICEMAN scripts for data filtering, matching, and reformatting. Integrated mainframe applications with MQ, APIs, and web services to support real-time data exchange with distributed systems. Utilized Expeditor, ISPF/TSO, and Control-M for debugging, job automation, scheduling, and SLA compliance. Supported version control and deployment using ISPW, maintained audit compliance, and implemented modular, reusable subprograms and copybooks for standardized development. Performed performance tuning, error recovery, checkpoint/restart logic, and DR planning, ensuring application stability and minimal manual intervention. Developed file transfer processes using NDM/Connect:Direct, executed environment refreshes with data masking, and supported migration efforts for platform upgrades and modernization. Provided 24x7 on-call support, created technical documentation, and delivered knowledge transfer sessions for junior developers and support teams. Collaborated with QA, business analysts, and architects across SDLC phases, applying mainframe modernization practices, REST API integration, and cloud/offload pipelines, while mentoring teams and ensuring high-quality, compliant, and maintainable solutions.
Led a migration from z/OS mainframe to RedHat Linux ES 7.5, including JCL conversions, ADABAS database migration, and deployment of Software AG products (ADABAS, Natural, Applinx, Predict, Construct, EntireX). Installed, configured, and maintained Software AG suites, implementing regression testing and raw API integrations with curl. Supported FTP/TIBCO MFT Cyber Fusion conversions from z/OS to Linux and directed proof-of-concept migrations to Windows and Linux. Developed RPC and Java REST APIs to integrate mainframe and Unix/Linux systems with Software AG and IBM products, including EntireX and Broker in CICS. Modernized legacy applications using NaturalOne, AJAX, and Natural Engineer, enhancing web standards, UI controls, and user workflows. Provided on-call support for HP-UX, Software AG products, and z/OS mainframe environments, including performance tuning, installations, problem diagnosis, and mentoring. Conducted system workshops and knowledge transfer sessions for ADABAS, triggers, SQL Gateway, Natural, Com-plete, and Review DC. Supported Adabas Event Replicator installation, configuration, and performance optimization. Recognized for enabling enterprise modernization, cross-platform integration, and high-availability system support, while mentoring staff and ensuring operational excellence across mainframe and open systems environments.
Administered and maintained IBM DB2 on z/OS, including utilities such as LOAD, UNLOAD, RUNSTATS, REORG, DSN1COPY, and performance monitoring with Omegamon/DB2, DB2PE, and BMC Activity Monitor. Managed DB2 Connect installations, client software, and distributed data access for client/server and web applications, supporting multiple data sharing groups across LPARs. Conducted SQL performance tuning, index analysis, stored procedure, trigger, UDF/UDT creation, and DR script development. Installed, configured, and upgraded Software AG products (ADABAS, Natural, Predict, Applinx, EntireX), applied vendor fixes, and resolved software abends. Developed and maintained automation tools using REXX, CLIST, and JCL for backup/recovery, housekeeping, and high availability. Provided 24x7 on-call support, troubleshooting mainframe and distributed system issues, applying PTFs, and coordinating with IBM support. Performed VSAM, JES2, and DFDSS maintenance, modular JCL coding, and environment management in Data Warehouse and z/OS environments. Conducted training and knowledge transfer sessions, guided developers on SQL tuning, and implemented performance improvement projects that reduced CPU usage and improved throughput. Managed multiple concurrent projects while ensuring SLA compliance, system reliability, and operational efficiency across mainframe and distributed platforms.