Commercial Risk applicants have rated the interview process at Aon 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 57.8% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
fairly easy, the online portion is very easy. however they do incorporate one recorded interview questions which can be strange as you are not face to face with another person.