It seems that most of the larger employers of ATCOs (and some countries and government agencies) have a mandatory retirement age for operational controllers (the FAA for example) so the examples given for older controllers are usually empoyed in towers (aerodrome control), as that is most often the realm where the smaller ATC providers operate.
However in Canada there is no mandatory retirement age, so NavCanada has quite a few older controllers in all ATC environments. For example, YVR ACC currently has two operational (and medically validated) controllers over age 70. One is 72, the other is 75.
At a recent get-together it was suggested a documentary should be made about their memories and reminiscences. It would be titled "Pushing Fabric"...
