Pros
Great company-wide business model which gives a sense of job security. Tons of intelligent, driven, fun scientists and engineers to work with and excellent networking. For me it was a great place to discover my strengths and weaknesses as a worker because of the wide array of project opportunities I had. Good company, good culture, oh, and good PTO and retirement benefits.
Cons
This is on a per office basis. Company-wise, it was my favorite consulting firm I had worked for, and I had worked for a couple big name firms prior to Ramboll. No overtime is sort of a bummer especially when you are doing 60 hour field work weeks. I personally had a manager that also really seemed to give all field staff that worked for her a hard time when it came to billing to her projects and approving expenses. But again, overall as a company, not really any major cons that stick out to me.