Pros
This is a financially strong, prestigious company with truly global reach. Hypothetically speaking, you could get some insurance or risk analysis experience in the US, then move to say Germany or the UK, all under the umbrella of Marsh McLennan. Diversity & Inclusion is also good, though--full disclosure--I am a straight, white, and male. In the D&I regard, they would regularly send out emails describing their plans and accomplishments. I believe they truly mean that they intend to make further strides in this area--though I can't imagine it is or was ever a toxic, dangerous environment like say Activison-Blizzard. In any case, I believe they will follow through. Overall, the culture I experienced was warm and inviting. Despite the next section, this is probably the best company I will ever work for.
Cons
Depending on the division or region you work in, your job/role may be hindered or made more unnecessarily tedious by inadequate and/or virtually non-existent internal/operations technology. You will be doing a lot of busy work. Lots of redundancies--and not the good kind. The technology issues are worsened by the subsequent need for human based, "manual" interdepartmental processes--processes that are very poorly designed. Further worsening the issue is that many of the newer or more junior employees are simply not trained in certain insurance related knowledge, leading to errors in the already poorly designed processes. All that being said, the company regularly took surveys to get a "temperature reading" of how the employees felt about the company. I believe they were anonymized. One of the main issues that regularly came up was "technology". In response to the results regarding technology, the company stated they would be making improvements in that area--and they did start to--but it was generally limited to client/external facing software.
