A Metro-North engineer who killed four people in a fatal Bronx derailment when he fell asleep at the controls is suing his former employer — claiming that the accident was their fault and whining that he was injured.

William Rockefeller, who was later diagnosed with sleep apnea, is seeking $10 million based on claims that Metro-North could have prevented the accident with better technology.

In a lawsuit filed in Manhattan federal court, Rockefeller called Metro-North a “deficient safety culture” and complained that he was injured in his own accident after he was “violently thrown about the cab.”

Rockefeller’s lawsuit claims the rail operator should have equipped the Manhattan-bound train with a system that would have “automatically” applied the brakes when the train went over a certain speed limit.

The suit also says the rail operator should have equipped his cab with a system of noisy signals that would have let him know the train was speeding.

Federal authorities say the Hudson Line train was traveling 82 mph when it derailed while traveling along a 30-mph curve.