| Aspect | Mainframe Development | Mainframe Testing |
|---|
| Primary Focus | Designing, coding, and maintaining mainframe applications | Verifying and validating mainframe applications for bugs and performance |
| Required Skills | COBOL, JCL, DB2, CICS | Testing tools, scripting, debugging, knowledge of mainframe environments |
| Work Environment | Development teams, coding in mainframe environments | Quality assurance teams, testing labs, mainframe systems |
| Certifications | COBOL certifications, IBM mainframe certifications | ISTQB, mainframe testing certifications |
While Mainframe Development involves creating and maintaining mainframe applications, Mainframe Testing focuses on ensuring those applications work correctly and efficiently. Both roles require knowledge of mainframe environments and related skills, but they serve different stages in the software lifecycle.