Large corporate websites can be difficult to design and maintain if you're trying to do it on your own. While it might be a good idea to hire in your own workers who will do the job of maintaining the site, it might be better suited to your needs to just work with a company like Cadre. Cadre is a website design and maintenance firm that specifically works with corporate sites. They have a lot of experience with these sites and can help you a lot with the running of your own. You will want to contact Cadre if this is something that you feel your entire site is going to be able to benefit from in the long run. You will notice that it feels good to give this project to another professional company so that you are not trying to figure out how to do it all on your own.