Is there a way to assign accounts to two different territories with one rep?

Is there a way to assign accounts to two different territories with one rep?

We have two instances where one rep is responsible for two different territories. For example, Josh is responsible for Territory 23 and Territory 27.

While I can assign Josh to separate territories, I could not find a way to assign the accounts to separate territories. I can only assign either all the accounts to Territory 23 or all the accounts to Territory 27. Is there a way to assign the accounts to two different territories with one rep (Account Owner) ?

Thanks!

John Galich