Employee Determination

Hello All,

I am trying to determine a Manager in a Transaction, who is assigned to a Org unit under position Manager.

1) Do i need to first have a Org determination profile assigned to Txn, to determine the Org Unit Manager?

2)Later have Access sequence assigned to Partner Function 'Manager' - which will determine employee assigned to org unit "manager" ?

Is there any other way to determine in a Txn?

Thanks