Customer Support applicants have rated the interview process at CoStar Group with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 51% positive. This is according to Glassdoor user ratings.
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Quick interview, background check took some time. From when I applied to my first day took about a month. Hard to navigate the directions into the building would be my main complaint. If I have not arrived an hour before I would have been late.