A professional who plans and directs mud-sample testing operations. Responsibilities include:

• Consults with oil-field drilling superintendent and interprets drilling logs to determine status of wells being drilled.
• Plans and coordinates itinerary for well-logging captain, mud analysis; well-logging operator, mud analysis and other members of mobile field-laboratory crews to obtain maximum utilization of personnel with minimum disruption of drilling operations.
• Interprets mud analysis logs obtained by crews, for petroleum engineer.