Senior IBM z/OS Connect Administrator / Developer

ITTConnect is seeking a Senior IBM z/OS Connect Administrator / Developer 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.

Job location: Columbus, OH (on site work). Relocation OK.

This person will design, implement, and support enterprise-grade API enablement solutions on IBM Mainframe. The ideal candidate should have strong expertise in z/OS Connect EE administration, CICS integration, high availability architecture, security, and REST API implementation.

Key Responsibilities:

• Install, configure, upgrade, and administer IBM z/OS Connect EE environments.
  
• Design and implement High Availability (HA) deployments across multiple LPARs and multiple z/OS Connect instances.
  
• Configure and support z/OS Connect integration with CICS regions, CICSPlex, and other mainframe assets.
  
• Design and implement HA and failover strategies for z/OS Connect and CICS environments.
  
• Develop, deploy, and manage REST APIs exposing CICS and other mainframe transactions.
  
• Configure and support RACF-based authentication and authorization.
  
• Implement JWT, TLS/SSL, and enterprise security controls for API access.
  
• Troubleshoot performance, connectivity, and production issues across z/OS Connect, CICS, RACF, and networking layers.
  
• Collaborate with Mainframe, Security, Infrastructure, and API Management teams.
  

Requirements

• 5+ years of experience with IBM z/OS Connect EE.
  
• Strong hands-on experience with:
  
• • IBM z/OS
    
  • z/OS Connect EE
    
  • IBM CICS Transaction Server
    
  • RACF
    
  • REST APIs / JSON
    
  • JWT and OAuth2 Authentication
    
  • TLS/SSL Security
    
  • DevOps and CI/CD automation
    
  • CICSPlex SM and Sysplex environments.
    
• Experience configuring multi-instance and multi-LPAR HA architectures.
  
• Experience exposing CICS transactions as REST APIs.
  
• Strong troubleshooting and production support skills.
  
• Experience with Liberty Server administration.