Clean Harbors interview questions
Updated May 28, 2026Difficulty
Easy
Experience
Mostly positive
How others got an interview
- 13%RecruiterRecruiter
- 11%Employee ReferralEmployee Referral
- 4%OtherOther
- 4%In PersonIn Person
- 3%Staffing AgencyStaffing Agency
- 2%Campus RecruitingCampus Recruiting
Interview search
207 interviews
Clean Harbors interviews FAQs
- Glassdoor users rated their interview experience at Clean Harbors as 59.4% positive with a difficulty rating score of 2.43 out of 5 (where 5 is the highest level of difficulty). Candidates interviewing for Mechanical Tech and Business Data Analyst rated their interviews as the hardest, whereas interviews for Cleaner and Service roles were rated as the easiest.
- The hiring process at Clean Harbors takes an average of 18 days when considering 167 user submitted interviews across all job titles. To compare, the average duration of hiring at similar companies like BlackRock, Inc. is 14 days, Fabricated Software, Inc. is 2 days, and Apple Inc. is 21 days. Candidates applying for Human Resource Business Partner had the quickest hiring process (on average 1 day), whereas Market Sales Specialist roles had the slowest hiring process (on average 90 days).
- Common stages of the interview process at Clean Harbors according to 167 Glassdoor interviews include:
Phone interview: 21%
One on one interview: 18%
Drug test: 16%
Skills test: 13%
Background check: 11%
Group panel interview: 6%
Presentation: 5%
Personality test: 5%
IQ intelligence test: 4%
Other: 2%
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