Dear Ms. Miller,
Thank you for posting your request on History Hub!
We searched The Signal Corps: The Outcome published by the U.S. Army Center of Military History but the 1058th Signal Corps was not listed. Listings of past commanders and Sergeant Majors may be available from the U.S. Army Center of Military History, 103 Third Avenue, Fort Lesley J. McNair, Washington, DC 20319-5058. The telephone number is (202) 685-2733 and their web site is https://www.history.army.mil/.
You may wish to contact the U.S. Army Signal Corps Museum; ATTN: ATZH-POM-M; Building 29807; Fort Gordon, GA 30905 for more information.
We hope this is helpful. Best of luck with your family research!