A professional who marks coded instructions on sandstone slabs to specify subsequent processing according to blueprint specifications. Responsibilities include:

• Studies blueprint to determine required dimensions of slab and processes needed to finish product.
• Locates specified slab on conveyor and verifies dimensions, using tape measure.
• Marks coded instructions on slab to specify processing required, such as radius edge, drip groove, and finished butt joint, using chalk.
• Records identification number of pieces on form and engraves number on slab edge, using air-powered engraving tool.
• Pushes slab onto roller conveyor for subsequent processing.