A professional who operates pumps that add yeast to wort, following standard instructions. Respnsibilities include:

• Turns spigot to drain yeast from pressurized yeast tub into yeast wagon, or starts pump to transfer yeast from storage tank to yeast brink (pressurized tank that pumps measured amounts of yeast to starting tank).
• Connects wort and starting tank lines.
• Signals brewery pumper or starts pump to transfer wort from storage to starting tanks.
• Mixes yeast and wort, using paddle and connects wagon and wort lines, or opens valve on brink tank to transfer yeast mixture or yeast to wort in starting tank.
• Observes flow dials and pressure gauges to ensure that specified ratio of yeast to wort is maintained.
• Opens starting tank valve to obtain sample for laboratory analysis.
• May pump pure yeast culture, prepared by yeast-culture developer, from sterile barrels through successive yeast culture tanks to permit further cultivation of yeast prior to adding it to wort and be designated Culture-Room Worker.