RailUK forums to the rescue ... https://www.railforums.co.uk/threads/international-rail-jobs.160859/ (thanks for the google-fu @vague 🙏🏻)
Ah, in fact, CP calls them "Rail Traffic Controllers" - thought there might be a terminology difference ! https://www.cpr.ca/en/careers/operations/transportation-operations-and-customer-support
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