Metal Fabrication Craftsman. Job Description. Protherm LLC is seeking full and/or part time candidates for day shift. Metal Fabrication Craftsman. in our. Brandon MN. manufacturing plant. Protherm is a leading supplier of custom electric infrared heating equipment sold to companies to make their products. We strive to be. people you can trust. that take pride in making quality infrared products that simply work and last. . We promote a flexible, ...