Which career best fits the group of the words below? High voltage, lines

Electrical Engineering, and, more specifically, Power Systems Engineering (or simply, Power Engineering).

Explanation:

The words high voltage and lines refer to power transmission lines (transmission of electricity). Power transmissions lines are the main concern of the electric power transmission, which is, at the same time, part of the subfield of the Electrical Engineering called Power Systems Engineering or simply Power Engineering, which "deals with the generation, transmission, distribution and utilization of electric power, and the electrical apparatus connected to such systems" Power Engineering (2020), in Wikipedia.

Then, the career that best fits this group of words is, therefore, Electrical Engineering, and, more specifically, as a subfield of it, the Power Systems Engineering.

I forget the word for it, but probably the guys who set up the power lines in the city.