I want to add Joe to a committee but he is not a director on the board.

I'm trying to add Joe to the HR Committee but I'm not certain what role I should assign Joe because he is not a director on the board.  

I want Joe to be able to access minutes and documents for that committee only and NOT be able to access the records of any other committee or of the board of directors. 

Add Joe as a director to the HR Committee.  In this situation, it does not mean that Joe is a director on the board but it does mean that Joe will be able to access all of the records for the HR Committee, vote on motions, be assigned actions, see events, and find records.  

Also, see