Shaun Valentine - Business Profile | Preferred Sands LLC .
Reviews from Preferred Sands employees about Preferred Sands culture, salaries, benefits, work-life balance, management, job security, and more. . QUALITY CONTROL TECHNICIAN (Former Employee) - Woodbury, MN - May 29, . Jobs - Career Advice - Hiring Lab - Browse Jobs - Tools - Find Certifications - Employer Events - About - Help CenterPreferred Sands LLC is a frac sand producer and technology company operating in silica sand and proppant technology. With strategic regional plant locations in Arizona and Nebraska, as well as an in-basin plant in Texas, Preferred Sands services expl.