Primary source for historical records on WWII German armed forces, is the Deutsche Dienststelle (WASt, Deutsche Dienststelle für die Benachrichtigung der nächsten Angehörigen von Gefallenen der ehemaligen deutschen Wehrmacht).
Internet site: https://www.dd-wast.de/de/startseite.html
They include personnel documents, listings, documents on military losses and a register containing over 18 million soldiers from WW II.
You have to fill a request form and provide known information of the requested person. In your case it is not much: first name initial and Surname. He could have been stationed in Brieg airport durin late war. Because you are not a relative, the reason for requesting information should be scientific research (Wissenschaftliche Forschung).
A large military collection is also held in the United States, in the National Archives and Records Administration's Record Group 242 (Collection of Foreign Records Seized). There are files of the Rasse und Siedlungs Hauptamt (Chief Office for Race and Settlement).