Agreeing with everyone, I would add my experience with CROs. I had multiple interviews to work as a clinical associate or project associate with these organizations. And during the interview process and the tour of the facilities, I noticed that it required more paperwork, direct contact with clients but its not what you would find working as an engineer or directly with a project. And from my knowledge you don’t always get to see the full scope of the project. You might be given a small task or one part of a task and that is all you will do. You wouldn’t necessarily get to see the entire project form start to finish or be given full input to what the task you are doing has to do with the initial project.

My knowledge on this might be wrong but that is what learned or assumed during my interviews.