Production applicants have rated the interview process at Clean Harbors 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 59.4% positive. This is according to Glassdoor user ratings.
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The interview process was short and sweet. I had about a 30 minute Phone call first and then the second interview. Unfortunately, I did not make it through to the hiring process but it was a good experience.