SQL 2012 :: How To Grant A New User Same Direct Privilege To Tables As Existing User

I am relatively new to sql developer. There is a new user that just joined our organization. I am trying to grant him the same direct grants privilege to the tables that an existing user has. The existing user has a ton of direct table access privileges and it will take days if I had to do each grant one by one like: grant select,insert,delete,update on 'table name' to 'user id'. Is there a way of copying or inserting an existing user's privilege and granting it to a new user.