How to Do SEO for Large Companies?
Setting the correct KPIs is a key step that you will find in all future interactions with the company stakeholders. Management and digital marketers are not experts in SEO, so you need to break it down to them and make sense of it all. After all, you need these people to approve your budget and act on your suggestions if they don't adopt the organic channel every action you take will fail. Who are the stakeholders? Digital marketers who own the landing pages, web engineers, the management, possibly one or more external agencies. Different groups with low to zero understanding how SEO works and what it can bring; always focused on revenue, and easy solutions like paid advertising which costs them a fortune to run compared to organic.
Set reasonable goals for the KPIs, expect all kinds of issues ahead that will delay or block organic performance and hope for the best. If you manage external agencies, you need to be the corporation rottweiler, so they don't spam the company website, and they provide some growth for the huge amount of money you spend. With web engineers, make sure they understand that there are no second thoughts or alternatives to what you need and no time to lose. Otherwise, they will bring up all kinds of excuses why this won't work or why they can't do it now or in one year. Also, make sure they understand the need to keep you in the loop for upcoming changes, releases, domain transitions, and other ingenious stuff they devise to keep their salaries running.