Dangerous Maintenance

I noticed some cars in the fields, where usually no cars are.
Nosy as I am I tried to figure out what their purpose was.
Until I saw this man on top of a high voltage pylon.
A quite dangerous job. High voltage (110 kV) as such is dangerous.
But in addition the height! It takes the engineer some time to climb up and down his "office".
(I tried to zoom further in, but the quality reduced too much. So only a small picture-in-picture.)