To become an aromatherapist, you will first need to find, apply, and enroll in a college or university that offers an aromatherapy undergraduate program.If you are unable to locate an educational institution that offers this type of program, you will need to find an aromatherapy school or training program.ob Duties. As an aromatherapist, you will be required to document your clients’ medical histories, prior to the therapy. In other words, you will ask your clients about their current physical and mental conditions. You will then discuss possible side-effects, complications, and drug interactions with your clients.