I understand that Careers is mainly targetted to the US market, or at least the majority of job offers are in the USA I guess, so displaying the job offer's distance in miles makes a lot sense. However given that Careers is also open to the rest of the world it makes more sense to actually use an internationally understood way to display these things.
As such I would like to request that the distance is being shown in kilometers, or at least suggest that a setting is added to change the way distances are displayed.