Thanks Shawn for your answer,
In my customer case, they want to script in the job, some actions on the client computer, and then on the NS. Typically, they want to delete some kind of computers that they just deploy with DS, because they doesn't need to be manage. So when the deployment is finished (OS + softs) on the target computer, at the end of the job, they want to remove the Symantec Agent and delete the resource from the NS Database automatically.
I find a solution to not use the server job, but it's 'homemade'.