Director applicants have rated the interview process at Center for Internet Security 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 80% positive. This is according to Glassdoor user ratings.
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It was a Very thorough interview process that lasted ~ 8 weeks. It consisted of Multiple rounds of interviews. I found all participants to be Very intelligent people who were experts in their fields. Process oriented. Fantastic conversations.