Tyler James Stevens of Cochrane has admitted to criminal negligence causing death and to criminal negligence causing bodily harm.
His sentencing hearing is set for Jan. 4. in Red Deer provincial court.
The remaining charges, which include impaired driving causing death, are to be spoken to that day.
Stevens was charged in March after a crash near Innisfail, just south of Red Deer, in which an SUV travelling north in the southbound lanes of the Queen Elizabeth II Highway hit another SUV.
The workers were all from the Philippines and had come to Alberta to work for an Edmonton hotel.