Ok place to work, a lot depends on your specific office - Anonymous employee Aon Employee Review

Working in consulting means long hours, even if they try to hide it when you are first hired. Always understaffed because people quit when it becomes too demanding, which ends up putting a higher burden on everyone else. Some offices (not all!) are still an old boys club, with the men favored at every level (even new hires). Constant buying of new companies and selling off of parts of Aon results in people not using the same systems, and people getting nervous whenever there is a big announcement ("will my department be leaving aon?")