Per Diem Traffic Associate (Sampler) Certified GroupPer Diem Traffic Associate (Sampler)Chicago, ILCertified 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. The Per Diem Traffic Associate (Sampler) supports food safety and quality programs by collecting product samples from a variety of client locations, including manufacturers, processors, warehouses, and distribution facilities.