That team doesn't just consist of leadership people who will set up the vision and plan for the Customer Success organisation but you also need those who will take care of your customers, most often called Customer Success Managers (CSMs) - also called Client Success Managers or Customer Success Executives (CSEs).
I've never held any of these titles exactly but I've spent a good few years working in similar roles albeit through partners (that's another topic we'll cover later) or directly taking care of customers when I was working in PR and digital agencies which is the same as if you're working in Customer Success in SaaS. But I've learned a lot about Customer Success over the years both by doing the job and by operationally executing on programs to enable Customer Success teams to do their jobs better.
So from everything that I've experienced, I want to cover the key things CSMs need to be effective in their day-to-day. If you manage a CSM organisation, consider these especially if you're just setting it up.