Dear Ms. Campbell,
Thank you for posting your request on History Hub!
To obtain his service/Social Security number, we suggest that you request a copy of his Official Military Personnel File (OMPF).. OMPFs and medical records of officers and enlisted personnel of the U.S. Marine Corps who were separated from service after 1958 and before May 1994 are located at NARA's National Personnel Records Center (NRPC), (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002. To request these records, please mail a completed GSA Standard Form 180 to NPRC. Certain information in the records is not available to the general public without the written consent of the veteran or his next of kin. For more information see Request Military Service Records.
Due to the COVID-19 pandemic, the NPRC is closed except for emergencies. Currently, NPRC will continue servicing requests ONLY associated with medical treatments, burials, and homeless veterans seeking admittance to a homeless shelter. If your request is urgent, please see Emergency Requests and Deadlines. Please refrain from submitting non-emergency requests such as replacement medals, administrative corrections, or records research until NPRC returns to pre-COVID staffing levels. Please check archives.gov/veterans for updates to the NPRC operating hours and status. We apologize for any inconvenience.
We also suggest reviewing NARA’s Locating Veterans and Service Members web pages for some ideas.
We hope this is helpful.