A professional who supervises and coordinates activities of workers engaged in operation of stills and related units, such as absorbers, debutanizers, catalyst hoppers, reboilers, heat and vapor exchangers, desalters, clay towers, stabilizers, furnaces, strippers, and desulfurizers, in which crude oil and resultant distillates are processed to separate and recover various petroleum products. Respnsibilities include:

• Confers with laboratory personnel to plan production schedules and to determine temperatures, pressures, rates of flow, and tank levels required for control of process.
• Directs refining operations in assigned units through refinery operator.
• Reviews recording-instrument and flowmeter charts, logsheets, and laboratory analysis reports to verify control of process.
• Performs other duties as described under supervisor master title.