I've owned my house in Castro Valley for seven years (next month) and I just took advantage of the great interest rates and the new conforming loan limits to lock in a 30 year 5.5% , paying off my previous two mortgages (a $300k ... Loan officers at a bank or a credit union are employees working to sell and process mortgages and loans for mortgage customers or home buyers like you. Their loan types and mortgage products have several varieties but they all come from one specific originator, their employers.