I have few pro-looking, contemporary designs for you. I'm always trying to make visual identities that are not generic, with overused graphic elements, but more unique, clean, simple, with abstract representation of work/business/company behind it. On some of them you have basic logo versions (#77, #79, #82), but also monochromatic/grayscale (#80) and negative space versions (#78, #81),...HQ logo must work well in all these variations (color, monochromatic, negative space) because of different printing and web applications, and they are all deliverable.
Hope you'll like some of them and feel free to suggest improvements (colors, fonts, layouts, etc.) if felt needed! Thank you!
...orange/dark gray color combination on entries #83 and #84,...a bit more Sun in the logo, and addint memorability factor, through stronger contrast. This is just a suggestion,...if you like the concept, but maybe prefer green/blue combo, let me know! Thanks!
Just a quick note! Design on entry #77, might be really unique/recognizable visual identity,...I've used gear element to represent the Sun, since you're doing work that is mostly mechanical construction related, but there's an option to replace this gear element, with actual Sun element,...if you like the idea, let me know, so we can do the modification! Thanks!