Pros
They have great resources, many knowledgeable people. They are number 1 in health care design, they push the envelope of what could be done. Cleveland Clinic Abu Dhabi will be amazing when completed. Their motto "Together we are better" is a great work ethic and can been seen through work share projects where teams of experts from different offices within the company converge and create great projects. Through work share a person can make many connections within the company.
Cons
Long hours are to be expected but that differs by office where 60+ hour work weeks are the norm for one and others have a normal work week and will change with deadlines. Getting pigeon holed is very common, not a place to advance in one's career unless they move away from HDR or a certain office and return. HDR is a newcomer in terms of producing the newest and greatest, there so much bureaucracy that it slows the reaction to any type of change. If one has good ideas or methods to improve workflow, it won't be done in any timely fashion.