Mainframe Developer (zOS Environment

This role sits at the intersection of legacy system stability and modern platform enablement, where core mainframe applications are being API-enabled and integrated into an AI-driven utility platform. You will play a key role in ensuring that foundational systems are scalable, reliable, and ready to support real-time data access and service exposure., * Ownand support a core mainframe application (MACSS) across production,enhancements, and project initiatives

• Developand maintain applications using COBOL, JCL, DB2, and CICS
• Troubleshootand resolve production issues across batch and online systems
• Collaboratewith API and platform teams to enable integration via z/OS Connectservices
• Supportdata flows and service exposure to downstream platforms (APIM, Kafka,etc.)
• Participatein system design discussions to support modernization and integrationefforts
• Ensureperformance, reliability, and scalability of legacy systems

Why This Role Matters

This position is critical in enabling the organization's transition to a modern, API-driven architecture by ensuring the stability and scalability of its core legacy systems.

• 8+years of hands-on mainframe development experience

• Strongexpertise in:

• COBOL

• JCL

• DB2

• CICS

Provenexperience supporting production systems and critical applications

Experienceworking in large enterprise environments (preferably utilities,banking, or insurance)

Strongdebugging and problem-solving skills in complex legacy environments, * Utilities industry experience.

ITTConnect is seeking a Senior Mainframe Developer (zOS Environment) to work on site for a client in the Columbus, OH area. This is a contract position with a client that is a global leader in consulting, digital transformation, technology and engineering services with over 300,000 team members in nearly 50 countries. The end client is in the Utilities sector.