Contextual filter on entity reference field in indexed view
If you want to show the jobs for that particular office on your job page, you might want to use a parameter. you need to pass the nid of that office to the url.

Create a link similar to this:

  $nid = arg(1);
&lt;?php 
    $l = l( t('More Jobs'), 'list-of-jobs',   array('query' =&gt; array('field_office' =&gt; $nid)  ));
    echo $l; 
        ?&gt;


your entity reference field is "office" right? use that field for your contextual filter. then use Views Contextual Filter Query module to get the parameter from the URL. In my example, it's field_office. 

Hope this helps!