Ingelsby grew up in Berwyn, Pennsylvania and attended Archbishop John Carroll High School, where he was coached by his uncle, Fran Inglesby.
He took a job at Cedar Point amusement park after his first year as a graduate student, where he came up with a story about a character that was released from jail.
After returning to Pennsylvania, Ingelsby was informed that Leonardo DiCaprio wished to star in the film and Ridley Scott wanted to direct it.
The Low Dweller was rewritten and was released as Out of the Furnace in 2013, starring Christian Bale and Woody Harrelson.
It featured Ben Affleck and follows a basketball coach trying to improve a high school team as well as his personal life.