As an odor tester, you engage in laboratory testing to adjust a product’s chemical composition and improve or alter its smell. Your responsibilities depend on your workplace and industry. For example, for a company that makes frozen foods, you use your nose (and science) to identify different scents and to test how a product smells upon cooking. In some cases, you might use your sense of smell to identify disparate scents in something, such as a perfume or a room spray. Other duties might include using chemistry to determine a scent, documenting your findings, and collaborating with scientists and engineers to produce a desired effect.