One member of staff can be nominated as the “Main NumBots Teacher” and/or "Main TTRS Teachers. This does not give them more administrative rights but it does make them the first point of contact.
A member of staff, can also be nominated as the Billing Contact. They would be the person that Maths Circle contacts regarding payment and subscriptions
You can find out this information and choose the Main contact and Billing contact by going to Account> Teachers.