SW Mertz Masonry Specialists is a masonry company that centers its work on federal projects. The company has completed juvenile halls, pump stations, fire stations and hospitals. SW Mertz Masonry Specialists does block work and related masonry services throughout northern California. The company recently completed Wilson C. Riles Junior High School in Rosewood, Calif. SW Mertz Masonry Specialist is a unionized company that was founded more than 30 years ago. The company is based in Dixon, Calif.