Moulder
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Trebor, these were found on two different sites of old occupations. Hope it gives some idea of what you asked.
Site 1) IRON INDUSTRY
Supported among others the following occupations: Brazier, Broker, Caster, Founder, Galvaniser, Moulder, Monger, Shearer, Platemaker, Worker.
MOULDER
A maker of moulds or castings, a brickmaker.
MOULDER RUNNER
A pottery moulder's assistant, a young boy who ran between master and drying oven, carrying full moulds and returning with empty ones.
Site 2)MOULDER - maker of molds or castings, brickmaker