I a looking for the independent truck drivers union in chicago. is there a address for it?

MY FATHER WARREN SUNDT WAS A MEMBER OF THE UNION AND DROVE FOR SLIVER FLEET IN THE 1950'S AND ALSO INTO THE 1960'S. I RECENTLY FOUND HIS DRIVING SAFTEY METALS. I WOULD JUST LIKE TO FIND OUT THE YEARS HE WORKED FOR THE COMPANIES.AS HIS DAUGHTER AND A SMALL GIRL IN THE FIFTIES I DID NOT PAY ATTENTION TO THIS NOR DO I REMEMBER THE DATES WHEN HE RECEIVED THESE AWARDS. MY GROWN SON IS NOW A TRUCK DRIVER AND I WISH TO GIVE THESE TO HIM WITH SOME HISTORY ATTACHED.