In a janitorial sales job, your responsibilities revolve around the marketing and selling of cleaning services or products. Your goal is to increase the number of clients your company has and gain more buildings to clean. Your day to day duties may include reviewing and assessing properties, providing quotes, explaining the services that your company offers, managing accounts, and communicating with potential and current clients. In this field, you may work as a janitorial sales representative, a janitorial sales manager, or an accountant for the company, to name just a few common positions. Depending on the position, you may have sales quotas to hit.