Jobst was born on February 17, 1994, in Speedway, Indiana, U.S. to parents John and Amy. While both his parents were athletes growing up, he began playing ice hockey after receiving a hockey stick from his aunt. As a result, he learned how to skate at his grandfather's pond in Illinois and during trips to Pan Am Plaza before eventually enrolling in organized hockey leagues at the age of five. Growing up, Jobst was a fan of the Minnesota Golden Gophers. Jobst originally attended Speedway Senior High School before transferring to Zionsville Community High School to play high school hockey.
