Mark Anthon Kiessling (b. February 14, 2000), better known by his stage name JUMEX (also known as goodnightm4rk), is a musician coming straight out of Chicago, Illinois. He was born in Brookfield & raised in Countryside. His father is German and his mother is Mexican. He currently resides in Los Angeles, California. His name comes from the drink "Jumex," which is a Mexican drink. He chose the name because it was his favorite drink when he was younger, it was the only drink he and his friends could afford when he was 12 years old.