Mainframe Developer

Job Title: Mainframe Developer

Location: Onsite - Omaha, NE / Remote

Experience Required: 10+ Years

Employment Type: Contract

Role Overview

We are seeking a highly experienced Mainframe Developer to support, modernize, and maintain enterprise mainframe applications. This role involves hands-on development, production support, and participation in modernization and decommissioning initiatives for legacy mainframe systems. The ideal candidate has deep technical expertise, strong problem-solving skills, and experience operating in mission-critical environments.

Key Responsibilities

Mainframe Development & Modernization

Design, develop, and enhance COBOL-based mainframe applications to support system improvements.

Contribute to mainframe modernization and decommissioning efforts, including refactoring and system transitions. Production & Batch Support

Provide production support, including incident resolution and root-cause analysis.

Perform batch job monitoring and support, ensuring successful and timely processing.

Participate in firecall/on-call support rotations to address critical production issues. System Operations & Maintenance

Maintain and troubleshoot applications using DB2, VSAM, JCL, and CICS.

Ensure application stability, performance, and data integrity across mainframe systems. Collaboration & Documentation

Work closely with cross-functional teams to deliver high-quality solutions.

Document technical changes, support procedures, and operational runbooks. Required Skills & Qualifications

10+ years of hands-on experience as a Mainframe Developer.

Strong expertise in Enterprise COBOL, JCL, DB2, VSAM, and CICS.

Experience with batch processing, scheduling, and monitoring.

Hands-on experience with Topaz or similar mainframe development tools.

Proven experience supporting production environments and handling critical incidents.

Strong analytical, troubleshooting, and communication skills. Key Competencies

Ability to work independently and in distributed teams

Strong ownership of application stability and support

Adaptability to modernization initiatives and evolving technologies

Calm and effective response in high-pressure production situations Technical Skills

Enterprise COBOL JCL DB2 VSAM CICS System Z Batch Processing Topaz Mainframe Modernization Production Support