Dear Mr. Jacobs,
Thank you for posting your request on History Hub and we are sorry to hear that your request did not return a file for your father.
The National Archives Catalog includes the Civilian Conservation Corps (CCC) Individual Records (Enrollees), 1933 - 1943 in the Records of the U.S. Civil Service Commission (Record Group 146) that may include a record for your father. If you have not already done so, please submit a NA Form 14136, Request Pertaining to Civilian Conservation Corps (CCC) Personnel Records to the address included on the form and include as much information as possible to assist in identifying the correct record.
CCC personnel records are in the custody of the National Archives at St. Louis. Since you've already submitted a file for your father, you may want to follow up with the National Archives at St. Louis by emailing: email@example.com
We hope this is helpful. Best of luck with your research!