Most concrete masons work for concrete contractors or for general contractors on projects such as highways, bridges, shopping malls, or large buildings such as factories, schools, and hospitals. A small number are employed by firms that manufacture concrete products. Most terrazzo workers work for special trade contractors who install decorative floors and wall panels. About 1 out of 17 concrete masons and terrazzo workers is self-employed, a smaller proportion than in other building trades. Most self-employed masons specialize in small jobs, such as driveways, sidewalks, and patios.
Many masons first gain experience as construction laborers.
They begin with tasks such as edging and jointing and using a straightedge on freshly placed concrete. As they progress, assignments become more complex, and trainees usually can do finishing work within a short time. A written test and a physical exam may be required. In the classroom, apprentices learn applied mathematics, plan reading, and safety. Apprentices generally receive special instruction in layout work and cost estimating.