⭐. Helper 3 (Core Technician). ⭐. PVB Fabrications, Inc. (PVB), a direct-hire, multi-disciplined industrial construction, and metal fabrication company is seeking a Helper 3 (Core Technician) to support our client's mining geological Core Logging Facility. This position is regulated by Mine Safety & Health Administration (MSHA) but it's not an active mining operation. . Type. Full-Time. Base Work Location. Tucson, AZ (Near I-10 & Wilmot). Hourly ...