Someone working as a Brass Founder meant he was actually involved with the casting of Brass components.
Some components could be as small as a few grams to others as big as a few kilos.
Yes, someone who poured the molten metal would be at the sticky end of the process. While those who were at the finishing end would be dressing the castings, removing the sprues, runners and risers from the casting process, and the more decorative components would be polished until you could see your face in them.
A hard job for anyone.