Depending on what the classification of the U.S. student hire is they may qualify for extensions. For example an F-1 student that is nearing the end of their OP

Depending on what the classification of the U.S. student hire is they may qualify for extensions. For example an F-1 student that is nearing the end of their OPT work period (90-120 days) and is working towards a STEM degree can get an F-1 STEM OPT extension of 17 months. The employer they are working for must also be enrolled in E-Verify to qualify to employ an F-1 student with a STEM extension. Then you have Cap-Gap. An F-1 student that has completed their OPT period and with a pending or approved H-1B petition may qualify to remain in F-1 status and get extended work authorization until Sept 30th (H-1B status and work authorization periods start on Oct 1). USCIS publishes the specifics for each fiscal year about Cap-Gap.