Pros
Good people, and a positive and inclusive company culture. Very good benefits including the on-campus food (and of course, all the more mundane health and 401K, stock options and things). Regeneron is growing quickly and internationally so you will get to meet and work with people from all over the world. Finally, the work the company does is genuinely exciting to be a part of, and life changing for patients. The company seems to really prioritize positive patient outcomes and innovation for the purpose of finding more cures and helping more people. I've been very proud to be a part of an organization like that.
Cons
Despite the focus on innovation in terms of new science and better medicine, Regeneron is fairly conservative and slow moving when it comes to innovating human processes and IT systems. In my opinion we rely far too much on paper and physical handwriting for a company, as just one example. Since I've been here we've been looking for ways to get digital versions of various forms and it really shouldn't take 5+ years to find and implement a solution to basic things like that. Related to that, the company's approach to work from home and general work/life balance is similarly old-fashioned. The slow rollback to what we were doing before the pandemic is nearly complete, and its been pretty disappointing that those scant few ways life improved during the pandemic have been tossed aside for no discernable reason. It just feels like senior leadership is stuck in the past and completely out of touch with how business can be done with modern communication tools. They seem convinced that meeting in a room instead of on Teams is the secret stuff that has made Regeneron successful and I just don't see it.