p>Lead diagnosis and resolution of complex, intermittent, or chronic issues involving: • Engine performance and emissions/aftertreatment (DPF, DOC, SCR, sensors, dosing systems) • CAN-bus and multiplex electrical systems, electronic control modules, and communication networks • Advanced hydraulics for refuse bodies, auto-load arms, high-pressure systems, and heavy truck power take-offs • Plan and execute major component work including major engine repairs, transmission and differential R&R, frame-off repairs, and complex hydraulic rebuilds. The Level A Fleet Mechanic/Technician is the top-tier technical expert in the shop, responsible for advanced diagnostics, complex repairs, and technical leadership across refuse trucks, heavy trucks/tractors, and support assets.