Senior Mainframe Developer

Senior Mainframe Developer

Location: Columbia, MD

Job Type: Full-Time

Position Overview

We are seeking a Senior Mainframe Developer to support enterprise modernization and transformation initiatives involving complex IBM Mainframe systems.

This role requires deep hands-on expertise in Mainframe technologies, legacy application analysis, modernization strategies, and technical expertise. The ideal candidate will perform assessment and modernization efforts, collaborate with client stakeholders and engineering teams, and support large-scale migration initiatives in enterprise environments.

Key Responsibilities

• Analyze, maintain, support, and modernize large-scale Mainframe applications and legacy systems
• Work extensively with:
• COBOL
• JCL and PROCs
• CICS
• VSAM
• DB2
• IMS
• BMS Maps
• Batch processing environments
• Perform technical discussions, modernization workshops, and system assessment sessions with client stakeholders
• Serve as the primary Mainframe technical POC for modernization activities, dependencies, and integration efforts
• Analyze legacy business workflows, application logic, system integrations, and data dependencies
• Recommend modernization, migration, remediation, and transformation strategies
• Support automated code analysis, remediation, and modernization workflows
• Document business rules, technical processes, data mappings, reconciliation logic, and functional behavior
• Collaborate with architects, QA teams, DevOps teams, business analysts, and cross-functional engineering teams
• Perform source code inventory analysis, dependency mapping, and technical assessment activities
• Support reconciliation, validation, testing, and stabilization activities
• Assist with enterprise data migration and synchronization initiatives
• Troubleshoot production issues, optimize batch workloads, and support application enhancements
• Participate in modernization factory workflows, including automated analysis and transformation activities
• Prepare technical documentation, modernization artifacts, operational runbooks, and system analysis reports
• Provide mentorship and technical expertise to engineering and modernization teams

Required Qualifications

• 10-15 years of hands-on experience with enterprise Mainframe applications
• Strong expertise with:
• COBOL
• JCL and PROCs
• CICS
• VSAM
• DB2
• IMS
• BMS Maps
• Batch processing systems
• Strong understanding of:
• Enterprise Mainframe architectures
• Transaction processing systems
• Batch processing frameworks
• Legacy application workflows
• Enterprise integration patterns
• Extensive experience supporting large-scale legacy modernization initiatives
• Experience working with automated code analysis tools, transformation pipelines, and modernization accelerators
• Strong client-facing communication and stakeholder management skills
• Experience serving as a technical lead on enterprise modernization programs
• Strong understanding of enterprise business processes, data flows, and system dependencies
• Exposure to:
• Distributed systems
• APIs and middleware
• Hybrid integration architectures
• Cloud modernization initiatives
• Familiarity with AWS and/or Azure environments
• Strong troubleshooting, analytical, and problem-solving skills
• Ability to drive technical modernization activities independently and hands-on in fast-paced enterprise environments
• Excellent written and verbal communication skills

Preferred Qualifications

• Experience supporting enterprise modernization and migration programs
• Experience with AI-assisted code analysis and remediation workflows
• Experience working with modernization factories, automated conversion tools, and migration accelerators
• Experience working in Agile/Scrum delivery environments
• Experience supporting government, financial, healthcare, tax, or other large enterprise modernization programs
• Familiarity with cloud-native modernization and hybrid cloud integration strategies