NFL offensive and defensive Coordinators have very little room for error.
All you need is one rough season (or for the head coach who hired you to get fired) and that could be it for you.
This is especially true in Giants world.
Bill Sheridan (2009) lost his job after one season. Kevin Gilbride (two Super Bowl wins) was “let go” after Eli Manning completely collapsed in 2013.
Steve Spagnuolo was fired this past offseason after leading a defense that allowed the second-fewest points in the league in 2016.
Mike Sullivan was fired after just two seasons as offensive coordinator.