Yes people with Sarcoidosis are able to work but this depends on how they feel both mentally and physically. We are all different and it affects us differently. Heavy workload, working with aerosols, noisy places of work, driving long journeys, is not appropriate. Office based work is also to be assessed by the responsible employer because sometimes the equipment might not be fit for the worker or the environment might not be suitable.
I am not sure of the % that work in the field because many sufferers have ended up losing their jobs due to this condition.