Demonstrated mastery of diesel engine diagnostics, electrical/multiplex systems, aftertreatment systems, drivability concerns, HVAC controls, brake systems, steering/suspension, chassis systems, and safety-critical inspections. Automotive Technician IV (Shop Foreman): Job Summary: The Automotive Technician IV – Service Shop Foreman oversees daily operations within the service center shop while actively participating in hands-on repair, maintenance, and diagnostic work.