Pros
Koch is a privately held company which results in longer term decision making rather than just trying to look good for the stock market. This isn't a company that quibbles about a $5 business expense as long as it was a legitimate expense. Many good people work at Koch Pipeline which makes it rare to not get along with someone. You are typically given a lot more decision rights and freedom than most companies. They pay decent, but certainly not top scale for the industry. The benefits are typical for a company of this size. However there is a company-paid pension after you've worked there 5 years. The core principles and business philosophies are sound and strongly advocated by management. They are treated as more than just words on paper.
Cons
Koch is not for everyone, you really have to understand and buy-in to the culture or it may be difficult to integrate successfully. Work/life balance is not great and definitely doesn't feel like a concern to management. Any concerns raised about staffing levels is met with a response that you need to do a better job prioritizing and to find ways to complete your work more efficiently. It seems like people are constantly being "let go". Unless you are fresh to the company a lot of my coworkers are unsure of their job security. They are constantly changing the companies operating structure. If they actually decide to keep you around during this odds are that you are now in a role doing something you find little fulfillment doing. Management seems to operate on fear. They want you to think that you are not safe in your job unless you raising the bar on yourself every single day. You are told that it is going to be difficult to argue for a raise for you and don't expect a bonus. They do a great job of making good people feel like they are just not good enough.