My least favorite part of working at Biogen is how onboarding is handled. At least for when I was hired in 2022, the onboarding process for my actual position was very minimal and was very much left up to me to reach out and decide what I needed to train on. This isn't a huge drawback as once you get into the swing of things, that problem goes away, but it is VERY common for new hires to not really be given any specifics on what they will train on, what management expects from them, etc. I've heard that a new process is being developed so this may be addressed by that as well.