How to: move members between your teams
As your company organisation admin, when you have multiple teams, you can move your company members between those teams.
First, go to your team Organisational settings page.
Here, you will see a list of your organisational admins, then your team members.
On the "3-dot" menu next to each member, you have a number of options:

In this menu, select Manage teams & roles.
Here, you can then tick or untick next to the teams you control to add the member to that team, and also change the role they have on that team.

When you are done you can Save or Cancel this. You can only do this for one team member at a time.
Team members can be added, removed or moved as often as you like, or removed from all your teams entirely in these options.