A corporate intranet is a long-term, multi-year project. The one I designed for a previous employer was a source of news, a repository of corporate documentation, guides to companies policies, event coordination, employee on-boarding and housed all the digital documentation employees might need to download. It served as a communications platform for a holding company with, at one point, four large subsidiaries. 

I’ve removed the company logo and any identifying information, so the screenshot below is primarily to show the design, layout and content flow.