Business Analyst Position applicants have rated the interview process at WTW 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 66.1% positive. This is according to Glassdoor user ratings.
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The process with WTW in 2014 when they were just Tower's Watson was several months long and included multiple phone interviews followed by an in person interview. Thereafter, it wasn't long before an offer letter was mailed.