The essential functions include, but are not limited to the following: Operate assigned bulk cement trucks, including dry powder bulk units and related Class A CDL/manual-transmission equipment, to transport cement and completions equipment to and from oilfield locations. Must be able to pass DOT drug and alcohol pre-employment testing, DOT-compliant post-offer physical, and job-relevant screens, including vision, hearing/audiogram, musculoskeletal assessment, pulmonary screening, drug screen, and functional capacity evaluation as required for the role.