A professional who supervises and coordinates activities of workers engaged in producing phosphoric acid by reaction of sulfuric acid with phosphate rock in continuous strong-acid process. Respnsibilities include:

• Directs workers in changes in operating processes, work procedures, and production rates according to production instructions.
• Observes workers to ensure compliance with safety regulations.
• Prepares work orders for repair or maintenance of equipment.
• Trains new employees or assigns trainees to experienced workers to learn job duties.
• Performs other duties as described under supervisor master title.