Heard of rope access ? Go to irata.org

Once you are certified, you can take on 10k kind of jobs like high rise building cleaner, offshore oil and gas kind of jobs.

Of course, you cannot be scared of heights.

Taken from Wikipedia under rope access;

Typical applications include:

Inspection, painting and construction on offshore oil platforms and power plants.
Inspection, surveying, maintenance on wind turbines.
Inspection, surveying, maintenance, and construction on bridges and dams.
Window cleaning, repair and aircraft warning light maintenance on high-rise buildings.
Maintenance on aerials, telecommunication and electrical transmission towers (pylons).
Construction assist on stadiums, spires, and other unique shape structures.
Geologic slopes.
Inspection, documentation and access to large building façades.
Events rigging and installations such as banners, flags, lighting and fireworks.