R301 to parent category for expired ads

Honestly I don’t know. This isn’t something that WP Job Manager can do out of the box.

We can’t really help with in-depth code customizations like this either, we can only provide support for the core plugin. You may want to look into one of these services:

https://jobs.wordpress.net/

https://studio.envato.com/

https://codeable.io/

Thanks!