As these are akin to 'hero' shots and we get to monday morning quarter back.. here are my thoughts.
Your lighting is great on the equipment, sucks on the people. The lighting on the people sucks because having them turn into the sunlight so they were at a 45* to you, and have them fold their arms, legs apart at shoulder width would have both of them look 'stronger' more in line with the job and the equipment behind them. AND/OR used some strategic fill flash on the shadow side of the people to fill the light in a bit, bare flash will work if balanced right.
Her shadow is covering the nose of that little truck, and it bothers me. Would have moved her around a bit to compensate. Also would have had her holding helmet, tool, something as an alternate.
His placement is just a bit off, IMHO, I would have moved him over the rear tire a bit more, that boom is a cool compositional element that could have been used a bit better.
I do like the pink/green balance you went for here, I do think that was a good way to go.
So I think you did very well for a short 'walk in and shoot this in 5 minutes' and I'm not saying I'd have done any better, other than fill flash, and better posing of the people. The gal in particular I wish would have looked more confident. Hindsight is always a goodthing/badthing.
I do think processing is great, love the color enhancement.