A professional who supervises and coordinates workers engaged in operating either press-and-blow, blow-and-blow, or spin forming machines and controlling auxiliary equipment, such as forehearths and lehrs, used to form glass bottles, containers, and other glassware. Respnsibilities include:

• Reviews production schedules to plan job change-overs, to requisition molds and parts from mold department, and to assign workers.
• Observes machine operations to verify mold pressures and temperatures, plunger pressures, timing of sequences, and size of gob (lump of molten glass), using knowledge of machine operation and product specifications.
• Inspects formed glassware for surface defects and conformance to specifications for size, shape, and weight, using templates, dial indicators, and scales.
• May make or assist in making job change-overs by removing and replacing molds, air lines feeder tubes, and plungers, and by adjusting gob shears and timing mechanism, using handtools and knowledge of job change-over procedures.
• May regulate and adjust temperatures and conveyor speeds of annealing lehr.
• May be designated bottle machines supervisor.
• Performs other duties described under supervisor master title.