Mainframe Operations & Batch Automation Specialist

SATHEESH DOMA

Texas, United States +1-314-***-**** ************.***@*****.*** linkedin.com/in/satheesh-doma

PROFESSIONAL SUMMARY

Senior Technology Operations Specialist & Mainframe Batch Analyst with 8+ years of experience managing enterprise z/OS batch environments, mainframe console operations, and production workloads. Demonstrated expertise in ESP Workload Automation (Events, Applications, CSF monitoring, overrides, job recovery), Control-M, and ZEKE scheduling platforms. Proven track record in ITIL-aligned incident management, JCL error resolution, COBOL abend triage, CICS region control, and system initiator optimization. Skilled in executing automated operational runbooks using REXX and Python to ensure production stability, high system availability, and strict SLA compliance.

CORE QUALIFICATIONS & TECHNICAL SKILLS

• Mainframe & Operations: IBM z/OS, TSO/ISPF, SDSF, JES2, SYSLOG, Initiators & Job Classes, CICS Region Cycling, Spool & CPU Monitoring, Console Operations.

• Batch Scheduling & ESP: ESP Workload Automation (Events, APPL, CSF Workspaces, Job Holds/Releases, Reruns, Overrides), Control-M, ZEKE, Dependency Management, Calendar & Event Triggers.

• Troubleshooting & Recovery: JCL Error Resolution, COBOL Abend Analysis, DB2/VSAM/GDG Verification, Space Abends, Root-Cause Analysis, Runbook Execution, Emergency Overrides.

• ITIL & Operations Support: ServiceNow Incident & Change Management, SLA Tracking, Production Triage, Shift Turnover, ITIL Best Practices, Escalation Protocols.

• Test & Refresh Support: Production-to-Test Data Copies, Environment Readiness, Pre/Post-Refresh Validation, Integration Testing, HP ALM, JIRA, Azure DevOps.

• Automation & Tooling: REXX, Python, OPS/MVS, SPUFI, File-AID, File Manager, Endevor Component Migration.

PROFESSIONAL EXPERIENCE

TEKsystems Senior Technology Operations / Mainframe Analyst (Client: Frost Bank)

Feb 2025 – Present Texas, United States

•Deliver 24/7 day-to-day operational support for enterprise z/OS mainframe environments, monitoring system performance, alerts, SYSLOG, CPU utilization, and spool queues using SDSF, TSO/ISPF, and ESP batch scheduler.

•Monitor real-time batch queues, event triggers, and application flows in ZEKE; perform job holds, releases, schedule overrides, reruns, and dependency bypasses to ensure uninterrupted business execution and SLA compliance.

•Analyze complex batch failures, COBOL abends, JCL execution errors, DB2/VSAM dataset space failures, and scheduling delays; execute runbook-documented recovery procedures or escalate to specialized engineering teams.

•Dynamically manage z/OS system initiators and job class assignments based on workload processing priorities, system capacity, and queue backlogs to maintain optimum processing throughput.

•Manage incidents, service requests, and operational changes within ServiceNow following strict ITIL frameworks; lead production triage, document workarounds, conduct root-cause analysis (RCA), and maintain seamless shift turnover.

•Execute controlled CICS region operations (startups, shutdowns, dumps, region resets) and monitor system transaction availability according to verified operational runbooks.

•Support planned environment refresh activities by coordinating production-to-test data copies, validating GDG/VSAM/DB2 dataset readiness, and conducting thorough pre- and post-refresh validation checks.

•Performed automated and manual JobScan checks on modified JCL, PROCs, and control cards prior to production release to detect syntax errors, missing datasets, catalog issues, and allocation conflicts

•Develop automation routines using REXX, Python, and OPS/MVS to streamline repetitive system checks, automate alert handling, and enhance AI-assisted operational analysis and reporting.

CGI Information Systems Senior Test & Operations Engineer (Client: Volvo)

Sep 2021 – Dec 2022

•Scheduled and monitored large-scale batch workflows using Control-M and ZEKE across integrated application and test environments, verifying job predecessor/successor dependencies, return codes, and file delivery.

•Constructed and modified production-grade JCL and PROCs for batch integration execution; diagnosed and resolved job abends, JCL syntax errors, file contention, and data discrepancies.

•Utilized SDSF, TSO/ISPF, CICS screens, and SQL queries to analyze processing outcomes, confirm database updates, and validate system recovery following changes.

•Managed DB2, Oracle, VSAM, and sequential test dataset readiness; coordinated refresh verification and defect resolution through JIRA, Azure DevOps, and ServiceNow.

Legato Health Technologies Software Engineer – Mainframe Support (Client: Anthem, USA)

Sep 2020 – Sep 2021

• Supported core healthcare batch and CICS online application processing, performing root-cause diagnosis on Enterprise COBOL abends, DB2 SQL errors, and VSAM file issues.

• Monitored batch execution, dataset generations (GDG/PDS), and job output via SDSF; executed unit/integration testing and deployment validation across test regions.

Capgemini Pvt. Ltd. Consultant – Mainframe Batch & Application Support (Client: RBC)

Dec 2015 – Sep 2020

• Provided production and batch support for high-volume banking billing systems, utilizing ESP Workload Automation (CSF, Events, APPL), SDSF, and TSO/ISPF to monitor batch streams and manage daily schedule execution.

• Monitored ESP batch cycles, analyzing return codes, spool output, dataset availability, step-level job failures, and job dependency bottlenecks to maintain continuous processing flow.

• Executed controlled job reruns, schedule overrides, holds, releases, and recovery actions in ESP in compliance with strict change control policies.

• Managed component promotion via Endevor and documented operational recovery runbooks for recurring billing batch flows.

EDUCATION

Master of Science in Computer Science Western Illinois University (Jan 2023 – Dec 2024)

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