In days of yore when we had a strong manufacturing industry, we employed people to work on drilling machines and we called them Drillers. I suspect that there were thousands of other drillers in mines and in civil engineering but as the other siblings are in a semi-skilled occupation I submit that he worked in engineering Michael Allbrook Nivard , No, I have failed to find him in 1911, so I've no clues: his father was a blacksmith and brothers were drapery asst. and cabinet polisher. Regards , Rosalind ...