Hoof began working on civil engineering contacts with Daniel Pritchard and subsequently became his son-in-law, founding the firm of Pritchard and Hoof, specialist canal tunnel contractors and later railway tunnels and cuttings.
They were the contractor for the construction of the reservoirs, etc. of the East London Waterworks at Lea Bridge from 1829-34, probably in the partnership of Pritchard and Hoof at this time.
Hoof continued working after the partnership split in the 1830s, with his sons James and William as Hoof and Sons, then Hoof and Hill.
 A Biographical Dictionary Of Civil Engineers In Great Britain And Ireland. A. W. Skempton (Editor)