I want to clarify that "Mark" and "Entreprenad" in swedish is words for "Ground construction" (Roughly translated). Syd means south, but I'm not totally sure if I should include it into the firms name. Convice me!
The "slogan" is just a signature. H is my first initial, and Wendel is my last name.
Maybe, use a cursive or handwritten style, like a signature?
The company uses excavators, so it must look good on, for an example, the arm.
The biggest advertisement is our clothing, excavators and cars.
One of the best advertisement, in my head, is headcaps. It's a great thing to give as free merch, and we always use it ourself. I also believe it looks better if it's embroided. So it can be too much unnecessary details. I'm thinking maybe dark grey caps and clothing for the most part, but excavators and cars are usually black or yellow.
I will attach a scribble I've done myself, but also a cap with a logo from another company that I just love. Do take in mind, it's not a new cap (therefor, it's a bit dirty), and that the other company works vastly in the same area as me, but I just want you to get an idea of what I like.