Out of the military and mobile phones area there are still a lot of RF engineering jobs in: cellular Base Stations development, designing devices for Point-to-Point microwave links, developing commercial radars (frequency range from 1GHz to 80GHz), developing wireless circuits for drones (this is a big business today, including anti-drones systems).
If you develop RF circuits and wireless devices using many RFICs this doesn't mean you have to be in RFIC semiconductor design business, but you still need to have deep RF/Microwave skills.
Perhaps there will be a time when all the radio receivers in the world will have the antenna attached directly to the ADC (so, zero RF engineering work) but I guess this will happen many years from now...