A Sonic Crew Member could be charged with any of the duties of the Fountain, Cook or even Skating Carhop positions. Crew Members are clearly open-minded people who like to learn new things. Some of the duties include. Following food safety procedures. Following security policies. Maintaining a clean Drive-In. Exhibiting a sense of urgency. Being a part of our Team and helping out wherever needed. Fountain. A Sonic Fountain is charged with taking ...