I approached the fitness manager of the gym and inquired about the job. The fitness manager told me that I needed a certification and CPR/AED certification. My first CPT certification was from ISSA and later on I received one from NASM. I received my CPR/AED certification from American Red Cross. Then, he told me to apply online and once that was done, it was basically in corporate's hands. The longer they see you train and bring in and train friends at the gym, the more interested they will be in the hiring process.