Where is the SharePoint job timer config (OWSTIMER.EXE.CONFIG) file
The SharePoint (on premise) job timer config file is located on the following local path:
C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\BIN\OWSTIMER.EXE.CONFIG
Where the ..\15\.. can be 14,15, 16 or else depending on the SharePoint version.