Railroaders' Nostalgia > searching for grandfathers employment records

My grandfather Paul Chadourne Sr. was a long time CNW fireman and conductor working out of Proviso Il. and Clinton Ia. I think he also did a stint on the Santa Fe in Chillicothe Il.

I would like to find out more information on his employment history. I have been in contact with the CNW Historical Society and they found an old photo of him but so far thats it.
Where else would be a good starting point for railroad employment records? My Grandfather retired in 1971 off the last Kate Shelley 400 between Chicago to Clinton.
Thanks for any help.
JC

Posted from Android

Try the Railroad Retirement Board
https://www.rrb.gov/Resources/Genealogy

Regards,
David C