Add taxonomy to custom post type archive

Hmm, couldn’t you just fiddle around with the rewrite slug?

So, instead of ‘slug’ => ‘position-type’, you can use some other url: ‘slug’ => ‘/careers/position-type’.

In doing so, you may need to disable the rewrite for the custom post type.

Also don’t forget to flush the rewrite rules for your changes to take effect, that took me a while to figure out. Basically it can be done by viewing the permalinks page in the admin site.