Pros
After the buyout and some time, there were no advantages. Might be a good place for someone just starting out to get experience from the real professionals but I would imagine they will not stay much more than maybe a year.
Cons
AECOM bought out a smaller company I worked for. The principals in the company were getting ready for retirement and needed the money for themselves and sold out to AECOM. Originally, the company was doing well and we were very busy. Then when AECOM came in, they did not understand exactly what the company did and made it near impossible to get jobs and the lawyers made it even more difficult to execute a contract in a timely manner. Basically AECOM took a well known and wonderful company and ruined it. Employees were let go because there was no work. There was plenty if AECOM had let the company operate as it had. Management tried but their hands were totally tied by AECOM and it got to the point where there was a mass exodus along with the terminations. AECOM is trying to be the big fish but as it turns out, they have not gained any respect from the employees in many offices. They expect people to be totally billable which is near impossible for support staff. Also expected are many more hours than 40 each week but the employees can only bill out 40. They won't pay overtime but expect overtime work. I honestly don't think that the upper management has a clue about what is going on.