Your new employer’s insurance company may become responsible for your old injury if you have another injury with your new employer that aggravates your old injury or if the nature of the work that you are doing aggravates your old injury. This is often the subject of dispute between the insurance companies for your old employer and your new employer – whether your medical condition is due to the effects of the old injury or whether it’s due to the old injury becoming aggravated by your current job or a new injury in your current job. Either way, you’re covered.