You can insure that the program runs in the CS queue, no matter what is on the job card, by inserting the following line before the execution of the program:

!ALTPROC ;PIN=0;PRI=CS

This alters your current process (the CI) to the CS queue. Anything that is launched by the CI is then launched in the CS queue. I've used this technique for various tasks and it works well. This form of the command only requires OP capability. And, if you have SM capability and/or the Workload Manager product, there are lots more things you can do.