Since you posted this request a few times in years past, Ancestry has "US Headstones Applications for Military Veterans 1925-1963" database online with a scanned image of the card. I don't know where you got your information that he was in the 17th Airborne (or an Officer), but it appears to be wrong.
His application has the following.... James Joseph Bradley dob July 16, 1912 dod Jan 9, 1957 Inducted April 30 1942 Hon Discharge Dec 14, 1945 Service # 31 076 310 NO Pension or VA Claim From Massachusetts Grade- T/SGT (Technical Sargent) Medals- Good Conduct & Victory Branch of Service &unit- U.S. Army USA Transport Bardstown Victory Headstone was a Flat Bronze Marker with a Christian Latin Cross Emblem. Cemetery- St. Mary's in Salem, Massachusetts Applicant for headstone- Dorothy E. Bradley and signed by same. address 23 Maple Street Salem, MA
He burial is not listed at Find A Grave but Dorothy's is at same St. Mary's Cemetery. This birth and death dates on Card match the SSDI dob and Jan 1957 death for James Bradley.
With his correct unit and Service # you can try to order his Service Record from the NARA. SO he was not an Office with a rank of LT or higher nor was he Airborne.