Hoblit was born in Abilene, Texas, the son of Elizabeth Hubbard King and Harold Foster Hoblit, an FBI agent. Much of Hoblit's work is oriented towards police, attorneys and legal cases.
Hoblit has directed and produced the pilot and series of such acclaimed television series such as NYPD Blue, L.A. Law and Hill Street Blues. He also wrote an episode of the latter series. Hoblit received Primetime Emmy Awards for his directing of the pilot episodes of Hooperman and L.A. Law.
He was married to actress Debrah Farentino from 1994 to 2009, they have one child together.