Pros
The Optum office itself was gorgeous. Great cafeteria, Caribou Coffee, convenience store, onsite health clinic, gym with nice locker rooms and covered parking. Overall they have a diverse group of workers and do seem to have a lot of older workers.
Cons
Optum has a lot of jobs and the new corporate campus is amazing. That said, the culture was sad. Prepare yourself for a lonely existence where you spend most of your days at your desk on WebEx. Culturally the organization is made up of a lot of people who, once they've learned the company specifics, dig in and coast along with the status quo. It is not a friendly environment. New employees are basically hazed by the culture. If you don't understand terminology, technology or who does what, you are on your own. Even enrolling in your medical benefits is self-service, and they make the benefits! If you are in any of the Twin Cities offices, expect within the first few months to have a corporate sit-down with your boss questioning if you really want to work there and why you aren't committing 80 hour weeks. Eventually you start giving into the bureaucracy and plan your days around the least path of resistance. Externally, Optum is positioned as a youthful, innovative and modern company, but that is not that culture on the inside. I question their ability to attract and retain creative individuals. For the most part, the people you will deal with are bureaucratic bullies who have been there for years and do not want to change.