A yard switcher is a tractor-trailer or truck driver who works in the commercial sector. Large companies often employ yard switchers to move trailers or products around the yard or in and out of docks by operating warehouse machinery like forklifts and semi-trucks in tight spaces. Job duties include cleaning and moving trailers, operating under safety procedures, checking vehicle maintenance and service, and possibly recording the weight of containers. Qualifications for this career begin with a high school diploma, but professional truck driving education is required as well as a commercial driver’s license (CDL). Mechanical skills are vital for this job, and prior experience in truck driving is helpful.