I can definitely see that working.
Closer framing, contrasty B&W, lovely classic image . . .
However, there's a part of me that likes the different approach with all the equipment to the left and the strong horizontal lines.
There's something slightly more interesting about it (to me) than the more obvious take on the scene.
It definitely needs a straighten. Personally, I'd get that wall level and then crop the top off immediately above the 2nd row of brickwork to give a panoramic aspect ratio.
I think it would minimise the distraction of the concrete blocks and actually make them work with the composition instead.
Maybe a selective curves adjustment on his face just to lighten that a bit too?
IMO the basis of a good image there and a few different directions that you could take it - would benefit from a bit of PP though