Employed by a farmer. Plenty of sheep in Yorkshire.
He may have been settled or he may have moved for work. There were hiring fairs.
Busiest times were lambing in Spring, shearing summer, gathering of flock from common land & separation of animals for sale or meat in autumn. Winter - taking hay to sheep when they couldn't graze, digging them out of snowdrifts, perhaps doing jobs on farm such as maintaining walls, sheepfolds, ditches.
Routine jobs for lambs - tail-docking and castration; also checking for & treating foot-rot in sheep; dagging (removing dirty wool from tail-end).
He may have lived in a tied cottage, so if he lost his job he also lost his home.