Senior Mainframe Developer

Requirements:

• 10–15 years of hands-on experience with enterprise Mainframe applications.
• Strong expertise in COBOL, JCL and PROCs, CICS, VSAM, DB2, IMS, BMS Maps, and batch processing systems.
• Strong understanding of enterprise Mainframe architectures, transaction processing, batch frameworks, legacy application workflows, and enterprise integration patterns.
• Extensive experience with large-scale legacy modernization initiatives and automated code analysis tools, transformation pipelines, or modernization accelerators.
• Client-facing communication and stakeholder management skills, with 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, or cloud modernization initiatives; familiarity with AWS and/or Azure.
• Strong troubleshooting, analytical, and problem-solving abilities, and the capacity to independently drive hands-on technical modernization in fast-paced enterprise environments.
• Excellent written and verbal communication skills.
• Preferred: Experience with enterprise modernization and migration programs, AI-assisted code analysis and remediation, modernization factories, automated conversion tools, or migration accelerators.
• Preferred: Experience in Agile/Scrum delivery environments or government, financial, healthcare, tax, or other large enterprise modernization programs.
• Preferred: Familiarity with cloud-native modernization and hybrid cloud integration strategies.

Responsibilities:

• Analyze, maintain, support, and modernize large-scale Mainframe applications and legacy systems.
• Work with COBOL, JCL and PROCs, CICS, VSAM, DB2, IMS, BMS Maps, and batch processing environments.
• Conduct technical discussions, modernization workshops, and system assessments with client stakeholders.
• Act as the primary Mainframe technical point of contact for modernization activities, dependencies, and integrations.
• Analyze legacy business workflows, application logic, system integrations, and data dependencies.
• Recommend modernization, migration, remediation, and transformation approaches.
• Support automated code analysis, remediation, and modernization workflows.
• Document business rules, technical processes, data mappings, reconciliation logic, and functional behavior.
• Collaborate with architects, QA, DevOps, business analysts, and cross-functional engineering teams.
• Perform source code inventory analysis, dependency mapping, and technical assessments.
• Support reconciliation, validation, testing, stabilization, and enterprise data migration and synchronization.
• Troubleshoot production issues, optimize batch workloads, and support application enhancements.
• Participate in modernization factory processes, including automated analysis and transformation activities.
• Prepare technical documentation, modernization artifacts, operational runbooks, and system analysis reports.
• Mentor engineering and modernization teams and provide technical expertise.

Technologies:

• AI
• AWS
• Azure
• CICS
• Cloud
• COBOL
• DevOps
• IBM
• IBM Mainframe
• IMS
• Support
• JCL
• VSAM

More

We are seeking a Senior Mainframe Developer to support enterprise modernization and transformation initiatives involving complex IBM Mainframe systems. The role focuses on assessment and modernization work, collaboration with client stakeholders and engineering teams, and support for large-scale migrations in enterprise environments. This is a full-time position based in Columbia, Maryland.

last updated 43 week of 2026