ATC authorities

[Trainiee pilot]

Hello,
After deciding not to pursue a career as a pilot due to cost, I am tempted to try as an ATCO. I have been looking at NATS but was wondering what other companies/authorities deal with ATC in Europe/ North America (I know about NAV Canada).
Thanks for the help!

[HEATHROW DIRECTOR]

Eurocontrol plus various government agencies in Europe, FAA in the USA. If you try to do ATC at one of the private colleges it will cost you as much as a pilot's licence. The only sensible way in the UK is via NATS.