Responsibilities:Analyze existing mainframe applications, databases, files, and batch processing workflows to support migration activitiesDesign, develop, and execute data extraction processes from IMS databases and legacy mainframe data sourcesCreate, modify, and support JCL required for data extracts, file transfers, conversion processing, and migration testingPerform COBOL program analysis and code modifications to support data extraction, transformation, validation, and reconciliation requirementsReview and update FTP/SFTP processes to support secure transmission of migration files between source and target environmentsUtilize IMS utilities and BMC Utilities for IMS to unload, extract, validate, and reconcile database contentDevelop and execute data validation and reconciliation procedures to ensure data integrity throughout the migration lifecycleSupport file mapping, field-level transformation logic, and data conversion specificationsTroubleshoot batch failures, abends, data discrepancies, and performance issues related to migration processingCollaborate with database administrators, architects, business analysts, and project teams to define migration requirements and resolve technical challengesCreate technical documentation, migration runbooks, implementation procedures, and production support documentationParticipate in migration testing, system integration testing, user acceptance testing, and production implementation activitiesProvide production support during migration cutover and post-implementation stabilization periodsIdentify opportunities for automation using CLIST, REXX, File-AID, and other mainframe utilitiesEnsure compliance with enterprise change management, security, and audit requirements **Only those lawfully authorized to work in the designated country associated with the position will be considered.** •**Only qualified Mainframe Systems Programmer candidates located near the Hartford, CT area will be considered due to the role requiring an onsite presence ***Required Skills:10+ years of Mainframe Development experienceExpert-level COBOL programming experienceStrong JCL development and troubleshooting skillsExtensive IMS Database experienceExperience with BMC Utilities for IMSExperience developing large-scale data extracts and conversion processesStrong understanding of FTP/SFTP file transfer methodologiesProven experience supporting enterprise data migration or modernization initiativesExperience performing data analysis, reconciliation, and validationAbility to work independently with minimal supervision in a deadline-driven environmentPreferred Skills:Experience with File-AIDExperience with EZtrieveExperience with CLIST and REXX automationPrior experience with legacy modernization or cloud migration projectsExperience supporting financial services, insurance, healthcare, or government mainframe environmentsCritical Success Factors:Ability to quickly assess complex legacy environmentsStrong problem-solving and troubleshooting capabilitiesExcellent communication and documentation skillsAbility to meet aggressive deadlines and deliver high-quality migration solutions under tight timelinesAbout the role: Seeking a highly experienced Mainframe Database Migration Specialist to support a critical, time-sensitive enterprise data migration initiative.