Pros
Great atmosphere, above average pay and benefits, and an awesome place to learn. Lots of overtime available, and the company is very flexible. Regeneron has a very youthful vibe and I have made many friends here. There is always a lot of movement within the company, so you don't have to be worried about being stuck in the position you're in forever if you want to explore other areas of the company. Also the stuff we do is really interesting, so that always helps! I would recommend Regeneron to anyone interested in biotech and pharmaceuticals.
Cons
I don't have many negative things to say about Regeneron, I am overall very happy to be a part of the company. However, as in any company with many employees, some people get by with doing very little work with others left to pick up their slack. Wish management was better about detecting this and resolving it.