Dear Ms. Hubbard,
Thank you for posting your request on History Hub!
The National Archives at College Park - Textual Reference (RDT2) has custody of microfilm copies of operational records relating to U.S. Air Force units. We searched the Air Force History index to the microfilm and located 5 files that pertain to the 3245th Air Base Group and Hanscom Field from 1967 through 1972. Please read the brief Abstract to determine which records you are interested in and click on the specific PDF icon. In the PDF listing, the IRISREF is the microfilm reel number and note the FRAME and FRAMELST numbers for the location on the reel. Since the reel numbers begin with D - Z, the microfilm is still security classified and RDT2 will not be able to make the reel available to you. The original paper copy from which the film was created is still in the custody of the Air Force Historical Research Agency (AFHRA) and has been declassified. To obtain copies of these records, please follow the instructions on this page.
Finally, you may be able to locate unofficial information about your father’s unit through sites like Together We Served - 3245th Air Base Group.
We hope this is helpful. Best of luck with your family research!
Here is a report and some highlights of the Hansom Field. Please copy and paste the link in your web browser. Also not sure if these MOS or military occupation codes are still the same from the 70s but thought you might want to know because they should be labeled in his file.