Murray Stewart raced to the scene in East Linton, East Lothian, after daughter Emma, 22, and his wife Alison, 49, were caught up in the crash on 18 December.
Luckily there were no serious injuries after Emma lost control of her Toyota Yaris due to the road's icy conditions and collided with a Ford Fiesta.
Mr Stewart said: "I've been in the fire service since 1984 but this was the first time I had ever been called out to an incident involving my own family.
"I wouldn't want to go through that again."
Mrs Stewart and Emma were cut free from their car by firefighters from Haddington and East Linton and were taken to the ERI as a precaution.