A real estate office manager oversees the business aspects of running a property or community association, including administrative, financial, and customer service tasks. In a large property management office, you may have an administrative assistant to handle clerical tasks. In a smaller office, your duties combine both the clerical and sales aspects of the job. As a real estate office manager, your responsibilities include providing customer service for the tenant, drawing up leasing agreements and contracts, collecting rent payments, and collaborating with a real estate agent in the buying and selling of property.