A business manager manages all aspects of a business, often in place of the business owner. Though your job duties will vary depending on the specialization and industry, your responsibilities involve directing company activities, strategies, and goals to make the business successful. You will oversee all departments, including finance, sales, marketing, human resources, and operations. You may also be responsible for the management of employees, supervisors, or department managers. Work hours often extend beyond the typical 9-to-5 workday. In the music, sports, or entertainment industry, a business manager handles their client’s business affairs.