Six (6) months or more of experience operating one or more of the following in the construction and/or mining field: -End dump truck - Caterpillar 770 class or larger, -Excavator- Caterpillar 325 class or larger, -Front-end loader Caterpillar 950 class or larger -Dozer- Caterpillar D8 class or large -Wirtgen Surface Miner 2200SM . As a Koch Engineered Solutions company, Optimized Process Designs (OPD) provides clients with detailed engineering packages in all disciplines, single-point procurement for all equipment and materials, fabrication and direct-hired construction services throughout the United States.