A fitness director is the manager of the fitness department at a gym or other health and wellness organization. As a fitness director, you may be the manager of the entire facility, especially if fitness is at the center of the business model. Your day-to-day duties can range from supervising the staff to making major business decisions on behalf of the gym. You may even serve as a personal trainer. Your responsibilities vary significantly based on the size of the facility and the importance placed on the fitness department. For example, a fitness director at a commercial gym will have many more responsibilities than one at a country club with a small fitness room. In any role, you are responsible for hiring and training employees, including personal trainers and customer service staff. Excellent interpersonal skills are essential for interacting with both employees and customers.