There are many different jobs in the gym and fitness industry, including professionals who coach clients on exercise and fitness, consult on nutrition, health, and wellness, or provide specialized instruction in a sport or type of activity. In addition to these personal training professionals, a gym also has attendants and support staff to clean and care for exercise spaces and equipment. Your responsibilities in these positions also involve providing customer service to each member or client at the gym. You can also find work as an administrator or manager, in which you work behind the scenes to handle the business aspects of operating a gym. Your duties vary drastically based on the position.