A mason tender is an onsite assistant to a stonemason. The primary responsibilities of a mason tender are to maintain tools, transport materials, and keep the job site clean. You assist the mason in maintaining, repairing, and constructing surfaces and structures made of bricks and stones. Your duties include helping lay tile, preparing and applying grout, and following all plans and blueprints to complete the project. Some mason tenders work for stonemasons within a specialized field, such as marble setters or brick masons. The most important job qualifications are good physical fitness, the ability to follow directions, and strong tool skills. Many mason tenders use the position to gain experience to become a career stonemason.