This code in functions.php will enable comments:
add_filter( 'register_post_type_job_listing', 'custom_register_post_type_job_listing' );
function custom_register_post_type_job_listing( $args ) {
$args['supports'][] = 'comments';
return $args;
}
Creating a job currently posts jobs with comments closed – I will add a filter in the next update to get around this, so as of version 1.2.1 you’ll be able to use:
add_filter( 'submit_job_form_save_job_data', 'custom_submit_job_form_save_job_data' );
function custom_submit_job_form_save_job_data( $args ) {
$args['comment_status'] = 'open';
return $args;
}
Until then, after the first change, you can enable comments by editing the job itself.