You mean you jackknifed a truck? I guess it depends on what if anything you were ticketed for. I don't know if you'll get a new job, but get out there and try. If you don't get a position, don't be afraid to ask them why. It might hurt a bit, but at least you'll know exactly what a potential job source thought about you and/or your record.
I take it to mean you jack knifed a tractor trailer? Whether or not you get hired depends on where you apply. Not all companies have the same policies. The Motor Vehicle Department can tell you how long it will stay on your record. It probably depends on whether or not the accident was your fault.