Pros
For some positions, autonomy. Large infrastructure projects. Initially competitive salary and benefits. Okay severance package.
Cons
If you work in IT, polish up your resume. If you work as a design services professional, don't expect to be efficient or productive. There is seemingly zero understanding about how to, nor concern for, providing high quality technical infrastructure and support. Acceptable response time for software issues is days, not hours. If you do get support, their expertise ends at the typical Microsoft products. Do you use CAD? Make friends with your cube neighbor because you will be figuring a lot out together. Forget BIM... AECOM is years behind the competition in implementation and utilization. As a prior employee of a profitable, established and technologically advanced firm I watched AECOM slowly reduce our offices to an inefficient, incompetent and inconsequential mess. Before AECOM acquired our firm, our IT department actually generated revenue through the many extra technical services we provided to our clients! AECOM genuinely did not know what to do with that. They're clumsy accounting systems and staff truly did not have a way to integrate a "positive overhead" operating model. Within three years AECOM effectively smothered profits, quality and morale to near asphyxiation with their "management straitjacket". Thousands of amazing, experienced, intelligent and passionate people have left or been let go by this tragically inept corporation. Hundreds of clients have been lost. Acquisitions and downsizing seem to be what they do with the most competence.