Builders FirstSource - Lake County FL Construction Serv-19900 Independence Blvd [Production Operator / Machinist] As a Lintel Pump Operator at Builders FirstSource, you'll: Perform pre-trip inspections of concrete pumps; Fill pump water tank before each project and ensure that the valves are properly shut; Evaluate site conditions and work with contractors to set up the truck in the right place; Operate pump as specified to place concrete in desired locations; Load and unload concrete pump attachments and ensure that pump systems are properly cleaned after job completion...Hiring Immediately >>