Although his origin and early life are obscure, he was probably born in Somerset and is first known as a wheelwright skilled in "turning iron & Brass, & making machinery for grinding" recruited by Edward Cave to operate a water-powered cotton roller-spinning mill at Northampton in 1741 under licence from Lewis Paul.
Yeoman established himself as a millwright constructing machinery such as ventilators invented by the clergyman Stephen Hales and began to take an active part in Northampton's business.
[1] Yeoman’s talents also extended to surveying, which he was already trying his hand at in 1752 when he drew up a map of the estate of the late Bartholomew Clarke of Hardingstone, a wealthy Turkey Merchant and grandfather of Edward Bouverie, who would later purchase Delapre Abbey.
After this his main work was as surveyor and engineer on numerous canal and river navigations including the Stort, Lea, Chelmer, Medway, Stroud and Thames.
[4] In many of these he worked as an assistant to John Smeaton and a major achievement was the Limehouse Cut which allowed shipping to avoid the sinuous River Lea.
)[2] Yeoman probably made President because of his seniority but it was a position he approached with enthusiasm taking the notes for the first few meetings and also covering parts of its costs.