If you plan to define an IEFJOBS concatenation in MSTJCLxx with a data set of SYS1.STCJOBS, create a DUMPCHK member in SYS1.STCJOBS. Place the job in this member and add an EXEC statement that will run the existing procedure. For example:

//DUMPCHK  JOB  'accounting_info',MSGLEVEL=(1,1)
//         EXEC DUMPCHK

When the START command is issued, MVS™ inserts a JCL SET statement after the JOB statement, resulting in the following JCL:

//DUMPCHK  JOB  'accounting_info',MSGLEVEL=(1,1)
//         SET  SG=ALL,JDATE=93119,DAY=THURSDAY
//         EXEC DUMPCHK