What was Mr. Pignati's profession in The Pigman?

Angelo
Pignati is a retired electrician, who lives by himself and is
extremely lonely until he meets two teenagers named John and Lorraine. After Lorraine randomly
prank calls Pignati, he agrees to donate ten dollars to their charity, and the teenagers end up
visiting his home. John and Lorraine discover that Pignati is a kind, welcoming old man and
begin to take a special interest in him. Their friendship develops, and the teenagers begin
spending the majority of their free time with Pignati, who desperately needs social interaction
after the loss of his wife, Conchetta. Pignati ends up taking the children to the zoo, buying
them gourmet treats and roller skates, and allowing them to hang out at his home whenever they
want. John and Lorraine begin to view Pignati as a close friend and enjoy the carefree
environment of his home. Tragically, Angelo Pignati suffers two heart attacks, and John and
Lorraine believe that they are in some way responsible for his death.