"Sister Alphonsine Ciza spends most of her day in gum boots, white veil tucked under a builder's hat, manning the micro hydroelectric plant she built"

Reuters on the Congo:

She picked up skills as a young nun, repairing electrical faults around the convent, which convinced superiors to send her to study mechanical engineering.

...

She works around the clock with a team of nuns and engineers, greasing machinery and checking the dials of a generator that is fed from a nearby reservoir and lights up a convent, church, two schools and a clinic free of charge.