Nah, computers/robots will replace the engineers
Haven't come across any systems that spec themselves, design themselves, build themselves, install themselves, commission themselves, maintain themselves or fix themselves. So it's a fair assumption that the more systems NATS have the more work there will be for engineers.
Airbus A380, arguably one of the most computerised aircraft ever. Who got the Quantas 380 back safely on the ground? Wasn't the bloody computers, it was the crew. Same goes for ATC. When the chips are down it's the humans who save the day.
I agree there will always be a need for some expert and experienced staff both on the ground and it the air.