Seppl once toured the world with indie and psychedelic rock bands, but in recent years he is known as a creative director and music supervisor in the media and advertising industry. He has earned numerous international awards for his work with brands such as Maserati, Heineken, Renault, and Diesel. In 2022, Seppl founded Magma Music Agency, which has since expanded to a team of nine. Magma is dedicated to elevating the quality of music in media worldwide.