Per Diem Traffic Associate (Sampler) Certified GroupPer Diem Traffic Associate (Sampler)Houston, TXp style="text-align:left">Certified Group is comprised of a set of specialized brands that collectively deliver laboratory testing, regulatory consulting, and certification & audit services across highly regulated industries: Certified Laboratories – Provides comprehensive analytical and microbiological testing, primarily supporting food, beverage, cosmetics, OTC, and dietary supplement industries. To view our Privacy Policy, click the link here: Certified Group Privacy Policy.