In many cases, the Principal will be a key member of the leadership team due to their managerial role in the school. (kidsmatter.edu.au)
Other members of the leadership team hold different views, I think, but they'll toe the line I expect. (nakedpastor.com)
But as your organization grows, you'll want to find ways to gauge which of your existing employees might make for strong members of your leadership team. (inc.com)