A professional who draws maps, diagrams, profiles, cross sections, directional surveys, and subsurface formations to represent geological or geophysical stratigraphy and locations of gas and oil deposits, performing duties as described under drafter master title. Responsibilities include:

• Correlates and interprets data obtained from topographical surveys, well logs, or geophysical prospecting reports, utilizing special symbols to denote geological and geophysical formations or oil field installations.
• May finish drawings in mediums and according to specifications required for reproduction by blueprinting, photographing, or other duplication methods.