Social Security Number On campus Off campus F-1 Curricular Practical Training (CPT) F-1 Optional Practical Training (OPT and OPT extension: STEM OPT) J-1 Academic Training (AT) F-1 & J-1 Severe Economic Hardship Work Authorization Career Center Workshop (2021) H1B Workshop (2021) Social Security Number Anyone employed in the US is required to have a Social