My maternal grandfather was a master welder, first for the railroad and then for the naval shipyards. Maternal grandmother never worked outside the home, but she did teach piano for several years in her home.
My paternal grandfather had a variety of professions. He was a cave guide in his youth, then a projectionist. He owned and operated movie theaters. He was Electro the Amazing Electric Man in the circus. He owned carnival rides. He was the lighting manager in a large burlesque house. Finally and for the rest of his life he was a house painter, inside painter and a paper hanger, all of which he did with great skill. Paternal grandmother worked a couple of years during the war assembling airplane radio sets and then many years selling quality costume jewelry at "home parties". Oh, yeah, and she was Electro's pretty assistant.