An assistant manager provides support to a manager to ensure that day-to-day operations run smoothly and efficiently. Specific job duties vary, depending on the company and industry. For example, an assistant manager at a retail store supervise staff, resolve customer issues, make the staff schedule, assign tasks, train employees, collaborate with store security and the product loss department, and monitor sales numbers. The responsibilities of assistant managers in a corporate company setting are specific to the department in which you work, such as accounting, development, marketing, and human resources.