Investigator applicants have rated the interview process at Healthfirst 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 58.3% positive. This is according to Glassdoor user ratings.
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The process was lengthy and consisted of 4 separate interviews with different members of the team. My start date ended up being 4.5 months after applying for the position. Overall good, just long.