Can a 'Team Manager' be the 'Team Manager' of multiple teams?

At the moment, it's not possible for one person to manage more than one team.

However, below, we've collected some helpful tips that may help you accomplish the same goal:

• Group all of the users they manage into one team and use tags to categorize these developers based on team, programming language..etc.
  
  
• Leverage the API  to build a dashboard for the 'Team Manager' so they can track the progress/metrics of all teams they manage.
  
  
• Assign them a Company Admin role (This will give them access to all teams).
  
  
• Create a separate account for the 'Team Manager' under each team (not recommended) 

Related Links:

• Team Set-Up Recommendations
• How to Add & Invite Users and Build Teams
• How to Manage Users