Automatic Updates of Related Records

Our app is used to post jobs where independent contractors can apply for jobs and a scheduler either assigns or rejects the Application record. Sometimes there are multiple application records for one Job record which default to PENDING. I want to have the system automatically change the status field of all Applications records with the same related Job ID field to REJECTED when a scheduler changes one application Status field to ASSIGNED. I am a novice but I figured using a listener and then updating the related records would be the way forward but I do not know how to do that. Ideas, suggestions? Thanks in advance for any help.

This would be nice to know.