There is a variety of different job roles in 'commercial production for Radio stations' some of these are a creative producer, recording engineer, copywriter and voiceover artists.
Creative Producer: They oversea everything in a radio show and organize everything and everyone such as music, guests and etc... They can also produce recorded content for radio commercials. They can also be the recording engineer and operate the sound, volume levels and etc... im a radio advert.
Recording Engineer: Another name for a recording engineer is a 'Audio engineer', they're in charge of recording, manipulation, mixing and reproduction of sound. Majority of them creatively use technologies to produce sound for radio. Recording engineers concerns are the creative and practical aspects of sounds which includes speech and music, also the development of new audio technologies and advancing scientific understanding of audible sound.
Copywriter: Copywriting is writing a copy for the purpose of advertising or marketing and the copy is meant to persuade the audience to buy a product or even influence their beliefs. They are used to help create a variety of things such as jingle lyrics, radio commercial scripts and a lot of other media products. Copy can also appear in social media content, which includes blog posts, tweets and other social networking site posts.
Voiceover artists: These read out what the copywriter has wrote, they can cover a variety of different things for example voice actors, celebrities and session vocalists.