A mortgage broker negotiates the terms of a loan between a client and lender一usually a bank or some other financial institution. As a mortgage broker, you act as a liaison between the lender and the potential client. Your job is to oversee the loan process with clients, help them understand their loan options, and find the best loan to fit their needs. You have a responsibility to clearly with clients regarding the terms and conditions of various loan programs and the accurate completion and submission of necessary documents.