TrinityRail Maintenance Services, Inc. is hiring an. Entry NDT Tech. at our. Shell Rock, Iowa. plant. Our products are an integral part of the supply chain that helps fuel our lives and our economy. Over the last 85 years, Trinity Industries has grown to over 6,000 employees strong with the common purpose of Delivering Goods, For the Good of All. As a member of the Quality Inspection team at Trinity, you’ll perform basic quality control testing a...